8800GT voltage mods

[largon]

This guide applies only to G92 based nVIDIA 8800GS, GT, GTS and 9600GSO reference boards. If your card has different layout feel free to report here, and, if possible post clear pictures of the card.

68253
http://www.xtremesystems.org/forums/attachment.php?attachmentid=68253&stc=1&d=1196804211
Higher resolution image (http://img227.imageshack.us/img227/3/8800gtg92gtsvgpuvmemmodgx6.jpg) @ Imageshack:

Addendum:
- stock vGPU voltages for this card are 1.05v (2D idle) and 1.15v (3D load)
- stock vMEM voltage for Qimonda GDDR3 (HYB18H512321BF-10) is 2.0v ±5%
- vMEM mod has been deemed almost useless as Qimonda GDDR3 does not OC any better at higher voltages
- 1kΩ variable resistor can be used for the vGPU mod in order to maintain minimum voltage close to stock. 500Ω VR will be more accurate to tune but it will also force vGPU slightly higher than stock even when the VR is tuned for lowest vGPU = maximum resistance.
- vGPU pencil mod turned out to be virtually impossible
- usage of a multimeter is required for tracking the vGPU
- ENJOY! :up:

----


Complete GeForce 8800 GS/GT/GTS Voltmods (http://www.techpowerup.com/articles/overclocking/vidcard/149) for reference PCB @ techPowerUp!

[metro.cl]

will help when i get home, i'm looking for a vmod becuase that is the limiting factor on my overclock

[largon]

Btw, here are some easily accessible vGPU measuring points (http://img229.imageshack.us/img229/351/g92vgpumeasuringpointskh4.jpg):
http://img229.imageshack.us/img229/351/g92vgpumeasuringpointskh4.jpg

[HousERaT]

Pencil mod anyone if it's possible?

[nordicpc]

I can't wait to see this fall out. I'll have one on Thursday, and am anxious to void some warranties with a VF-900.

[kiwi]

Pencil mod anyone if it's possible?

Only vmem

[largon]

Yup, vMEM is definitely pencil modable and actually, vGPU should be too if you're careful [EDIT: VGPU PENCIL MOD UNTESTED! DO NOT APPLY!]). BUT a multimeter is a MUST for a safe vGPU pencil mod... The resistor is awfully tiny but it is doable, it's possible because the affected resistor has higher resistance than on G80GTS/GTX thus pencilling is easier.

The modable resistor for vGPU is the one marked with numbers 2 and 4 (http://img89.imageshack.us/img89/5458/g92vgpumodtraces1234kx8.jpg), but I need measuments of the requested points to be able to calculate the target values for VRs / pencil resistance.
EDIT: VGPU PENCIL MOD UNTESTED! DO NOT APPLY!

For vMEM I need the measurements for spot7-to-spot8/ground in the second pic (http://img89.imageshack.us/img89/5265/g92vmemresistance78kk8.jpg).

Would someone bother measuring the stock vGPU?
Measuring points can be found in post#3.

[HousERaT]

/subscribed

[metro.cl]

Between 7 & 8 is 612
Between 2 and 4 is 011
Between 2 and ground is 015

1 to 2 = 002
1 to 3 = 002
7 to ground = 002

vGPU 1.06v

[dinos22]

here are all the other photos i posted there




here is an actual image of my card here

http://img89.imageshack.us/img89/3092/img0800cm7.jpg

http://img143.imageshack.us/img143/9908/img0817pc6.jpg






Thanks, dinos22. :)
Need clarification on the existence of certain traces and few resistance measurements, see attachements.

First pic:
There should be traces between points 1, 2 and 3. It certainly does look like there is a trace between 2 and 3, but is there one between 1 and 2? = if there are traces between 1, 2 and 3 then resistance between each is ~4-6Ω.
Also,
Resistance between points 2 and 4? (might be <10Ω)

Second pic:
Resistance between points 5 and 6? (might be around 500Ω)

if i set 200 on dial i get 10.4 on points 2 & 4
if i set 20K on dial i get 1.10 on points 5 & 6

looks like my battery might be going on the DMM

best view i can get with camera
naked eye won't work just can't see that :banana::banana::banana::banana:

http://img86.imageshack.us/img86/2090/img0818bbvp3.jpg

http://img148.imageshack.us/img148/1354/img0830bbbbbq5.jpg

http://img84.imageshack.us/img84/3232/img0820bbbbbbvf3.jpg

[metro.cl]

point 5 & 6? i get similar reading with you Dino just a couple of 0X of diference

[dinos22]

if i set 200 on dial i get 10.4 on points 2 & 4
if i set 20K on dial i get 1.10 on points 5 & 6


so how do you read this as actual values
can someone tell me

would it be 10.4*200=2080Ω or 2.08kΩ
1.10*20K=22000Ω or 22kΩ
:confused:

[largon]

Thanks metro.cl and dinos22!

Between 2 and 4 is 011
Between 2 and ground is 015I'm suprised to hear these points measure that low values. Gonna have to have another look at the vGPU resistor network...
Everything else is like I expected. Especially the vGPU... Lot's of headroom to crank it up, the chip should take 1.4V with ease. :P
point 5 & 6? i get similar reading with you Dino just a couple of 0X of diferencePoints 5 & 6 were discarded because that particular resistor wasn't in the end that very interesting. :)
so how do you read this as actual values
can someone tell me

would it be 10.4*200=2080Ω or 2.08kΩ
1.10*20K=22000Ω or 22kΩ10.4 @ 200 dial = 10.4Ω
1.10 @ 20K dial = 1.10kΩ = 1100Ω
The dial selects the maximum measureable resistance. If the result is higher than the selected dial option then the device will simply display "1". So, in a way, one has to know approximately how much the measurement's result should be in order to accurately measure resistance.




Oh, and here is the vMEM mod (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66518&stc=1&d=1193779680) & vMEM measuring points (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66520&stc=1&d=1193780045) (stock vMEM is 1.8v &#177;5&#37;):

[metro.cl]

Thanks metro.cl!
I'm suprised to hear these points measure that low values. Gonna have to have another look at the vGPU resistor network...
Everything else is like I expected. Especially the vGPU... Lot's of headroom to crank it up, the chip should take 1.4V with ease. :P10.4 @ 200 dial = 10.4Ω
1.10 @ 20K dial = 1.10kΩ = 1100Ω
The dial selects the maximum measureable resistance. If the result is higher than the selected dial option then the device will simply display "1". So, in a way, one has to know approximately how much the measurement's result should be in order to accurately measure resistance.




Oh, and here is the vMEM mod (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66518&stc=1&d=1193779680) & vMEM measuring points (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66520&stc=1&d=1193780045) (stock vMEM is 1.8v ±5%):


any way to pencil mod it? i dont have VR here :(

[dinos22]

interesting. :)10.4 @ 200 dial = 10.4Ω
1.10 @ 20K dial = 1.10kΩ = 1100Ω
The dial selects the maximum measureable resistance. If the result is higher than the selected dial option then the device will simply display "1". So, in a way, one has to know approximately how much the measurement's result should be in order to accurately measure resistance.




i get it now thanks buddy :up:

[largon]

metro.cl,
Sure, just apply a little pencil over the resistor and measure the resulting resistance & vMEM after every application. I don't know how well Qimonda GDDR3 responds to voltage, so, just to be safe make sure you keep the resistance over 530Ω. This way the vMEM doesn't go above 2.0V

[largon]

How about the resistance between these 2 points (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66521&stc=1&d=1193782200)?
Still about 11Ω?

edit:
It's 00:23 AM over here... And I'm recovering from a nasty flu.
I'm gonna hit the bed.
&#166;o

[wittekakker]

VGPU in BIOS is set to 1,05V. I saw 1,1V is the highest possible value, maybe it works and boosts your overclock 2% :)

Made modbios via Nibitor, here is the zipfile, use at own risk.

[K404]

The Primarion datasheet is still essentially private :(

From other cards that use it, does anyone know what pin is the feedback line?

I wanna test the guide on VR-Zone: find feedback pin, measure the resistance between the FB pin and ground. Multiply this value by 20, and get a VR with the resultant value. Solder between FB pin and ground....seems too easy!

There are VMax and Temp-sens pins as well, so might need to find a way of adjusting VID in due time if the limits are too tight

[oohms]

If someone had a datasheet figuring out an OVP mod wouldnt be too hard... It might even be possible to add the missing phase :D

edit: Why are the datasheets private anyway? I dont get it

[dinos22]

guys nvidia will not release the info on those
i already tried with all my guys

[oohms]

I think anyone with a "corporate email account" can get access to the datasheet.. You just have to register here:

http://www.primarion.com/Primarion/RegisterAccount.aspx

(I have no idea what distinguishes corporate email from other email addresses :confused: )

I also found this:
http://www.primarion.com/PrimarionMain/Documents/PDB-3544.pdf

That should at least give us some clues. Only the pin numbers are missing, but with a bit of tracing it shouldnt be too difficult to find them.

[oohms]

Heres an attempt at finding the differences between the working phases and the missing one:

http://i30.photobucket.com/albums/c306/oohms/misc&#37;20oc/img0817pc6mod.jpg

If anyone has a pic to this level of detail of the front of this section i can have a look at it too


edit: From looking at their features list, im not 100% sure its as easy as soldering in the components.



-Multiphase power conversion 1-4 phases
-2-bit VID input for additional voltage control
-Driver detect prior to soft-start disables unpopulated phases
-Autonomous or user controlled phase dropping based on current balance and 12V supply faults

[oohms]

Resistor for OVP mod:

http://i30.photobucket.com/albums/c306/oohms/misc%20oc/img0818bbvp3mod.jpg

This thread by hipro5 will tell you more:
http://www.xtremesystems.org/forums/showthread.php?t=162124

[oohms]

MIGHT be the vcore solder point:

http://i30.photobucket.com/albums/c306/oohms/misc%20oc/img0830bbbbbq5mod.jpg

(Got info from http://xtreview.com/review164.htm )

Dinos22: What is the resistance between point 1 and ground?

Gawd this is so much more fun than studying for exams :D

[dinos22]

MIGHT be the vcore solder point:

http://i30.photobucket.com/albums/c306/oohms/misc%20oc/img0830bbbbbq5mod.jpg

(Got info from http://xtreview.com/review164.htm )

Dinos22: What is the resistance between point 1 and ground?

Gawd this is so much more fun than studying for exams :D

LOL i know what you mean about taking a break from studying

i used to go play golf of all things (actually just practice shots myself :rofl: a looooooong time ago :D)

what is point 1 that you refer to

[oohms]

what is point 1 that you refer to

The circled point in the last pic (connected to vsense)

[metro.cl]

VGPU in BIOS is set to 1,05V. I saw 1,1V is the highest possible value, maybe it works and boosts your overclock 2% :)

Made modbios via Nibitor, here is the zipfile, use at own risk.


i get 015 between those points

[dinos22]

VGPU in BIOS is set to 1,05V. I saw 1,1V is the highest possible value, maybe it works and boosts your overclock 2% :)

Made modbios via Nibitor, here is the zipfile, use at own risk.
can you alter RAM timings in the bios?

[largon]

MIGHT be the vcore solder point:

http://i30.photobucket.com/albums/c306/oohms/misc&#37;20oc/img0830bbbbbq5mod.jpg

(Got info from http://xtreview.com/review164.htm )

Dinos22: What is the resistance between point 1 and ground?^This spot-to-GND is essentially the same as spot2/spot3-to-spot4 in this pic:
http://img89.imageshack.us/img89/5458/g92vgpumodtraces1234kx8.jpg

I'm pretty sure we're talking about the right soldering spot for the vGPU mod... But here (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66544&stc=1&d=1193813767)'s a safer (it's not a populted SMD solderpad) and much easier soldering point:

[largon]

11Ω (or 15Ω?) between vSense pin and ground is a horribly low resistance. I was expecting something around 45Ω since G80GTS/GTX which measures to 35Ω output 1.28v, and since the GT has lower vGPU thus the sense resistance should be higher than those on GTS/GTX as all use the same PWM IC. <20Ω is very low and IMO somwhat suspicious...

If someone is willing to be a guinea pig then I would suggest soldering a 500Ω multiturn VR between this point (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66544&stc=1&d=1193813767) and ground. Before soldering measure the resistance between soldering points (should be ~15Ω), set VR at max resistance (500Ω), solder the VR, measure resistance between soldering points (should be ~14.5Ω, if much less don't turn the card on) tune down for more vGPU.

[metro.cl]

^This spot-to-GND is essentially the same as spot2-to-spot4 in this pic:
http://img89.imageshack.us/img89/5458/g92vgpumodtraces1234kx8.jpg

I'm pretty sure we're talking about the right soldering spot for the vGPU mod... But here (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66544&stc=1&d=1193813767)'s a safer (it's not a populted SMD solderpad) and much easier soldering point:

that one to ground? what VR value should i get? the space is pretty small and my soldering skills bad but i'll give it a try.

There is no way for a vGPU pencil mod?

[metro.cl]

we need shamino to enlighten us here

[metro.cl]

The circled point in the last pic (connected to vsense)

015 from what i get.

Pin 1 to ground

[largon]

Easiest soldering point for vGPU mod:
http://www.xtremesystems.org/forums/attachment.php?attachmentid=66544&stc=1&d=1193813767
^This point to ground, 500Ω VR at max, tune down for more vGPU.
Be sure to measure the resistance before and after soldering before powering up.

[oohms]

15Ω... thats a bit off the GTS/GTX

I guess its possible, the other resistor might be of a lower value too..

[Garrett]

Does the 8800GT card have the same layout as the 8800GTS or the 8800GTX?
I haven't seen pics of it without cooler yet...

-edit- never mind
Left card:
http://www.xtremesystems.org/forums/showthread.php?p=2523668#post2523668

[largon]

The vGPU mod needs beta testing but otherwise the mods are technically the same as for 8800GTS/GTX only the tracing and solder points differ. Unfortunately pencil vGPU mod doesn't seem to be possible - unlike it was first thought. :(

!WARNING, BETA, UNCONFIRMED!
Reference 8800GT 512MB vGPU, vMEM, pencil vMEM mods (http://img225.imageshack.us/img225/5030/8800gtg92vgpuvmemmodspj0.jpg)
!WARNING, BETA, UNCONFIRMED!

[wittekakker]

can you alter RAM timings in the bios?

Yes, that is possible. 8 different timingsettings, no clue if it really changes anything in real life.


The vGPU mod needs beta testing but otherwise the mods are technically the same as for 8800GTS/GTX only the tracing and solder points differ. Unfortunately pencil vGPU mod doesn't seem to be possible - unlike it was first thought. :(

Reference 8800GT 512MB vGPU, vMEM, pencil vMEM mods (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66562&stc=1&d=1193841497)

My thoughts went for the some spots yesterday, Vgpu didn't work out for me :(

[BenchZowner]

Yes, that is possible. 8 different timingsettings, no clue if it really changes anything in real life.

You don't need to play with the timings-sets, just click on Advanced ( I don't remember if that's the name of the button in the timings tab ) and you'll get to the timings editing page ( where you can edit each timing individually )

[largon]

I hate to say this but it's possible nVIDIA somehow prevented vGPU vmodding by some nefarious board design feature. If the vsense pin doesn't react to resistance changes it certainly doesn't look good...
:( :confused:

[K404]

I hate to say this but it's possible nVIDIA somehow prevented vGPU vmodding by some nefarious board design feature. If the vsense pin doesn't react to resistance changes it certainly doesn't look good...
:( :confused:

I refuse to believe thats true!!

Cards only been publicly available for 3 days...the mod will be found eventually :up:

[wittekakker]

You don't need to play with the timings-sets, just click on Advanced ( I don't remember if that's the name of the button in the timings tab ) and you'll get to the timings editing page ( where you can edit each timing individually )

Indeed, but I think not many have the time available to search for ultimate timings for their card, having predefined sets works easier. On the other hand, the extra gain is rather small. If you are 2 3D Marks away from the world record, I might want to put effort in it, otherwise I would just neglect this feature.

[BenchZowner]

I hate to say this but it's possible nVIDIA somehow prevented vGPU vmodding by some nefarious board design feature. If the vsense pin doesn't react to resistance changes it certainly doesn't look good...
:( :confused:

Have you tried soldering the VR directly on the Vsense pin on the primarion ic ?

[largon]

As it happens I don't have the card, yet. So I haven't done any soldering. :\
But it doesn't matter what point the VR is soldered as long as the solder point is directly connected with the sense pin.
There are atleast 4 points (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66563&stc=1&d=1193851215) that could be used for soldering the VR - if the mod worked that is...

[BenchZowner]

As it happens I don't have the card, yet. So I haven't done any soldering. :\
But it doesn't matter what point the VR is soldered as long as the solder point is directly connected with the sense pin.
There are atleast 4 points (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66563&stc=1&d=1193851215) that could be used for soldering the VR - if the mod worked that is...

AFAIR this Primarion IC has a more complicated Vsense/FB circuit.
Anyway, as soon as more people get the card, the Vmods will be out for sure ;)

[largon]

What really bugs me is that those 2 resistors connected to the vsense pin don't appear to ground with the actual ground plane which is just a quarter of a millimeter away from the resistor, instead both traces end in copper vias and dive into the PCB. I wonder where those traces really ground...

edit:
Here's a pair of pics to compare the vsense network on G80GTS and G92GT, they're physically almost identical if the layout difference isn't considered (left=G80GTS, right=G92GT, red color=vsense):

[LardArse]

What really bugs me is that those 2 resistors connected to the vsense pin don't appear to ground with the actual ground plane which is just a quarter of a millimeter away from the resistor, instead both traces end in copper vias and dive into the PCB. I wonder where those traces really ground...

edit:
Here's a pair of pics to compare the vsense network on G80GTS and G92GT, they're physically almost identical if the layout difference isn't considered (left=G80GTS, right=G92GT, red color=vsense):


i dont have a card, if it doesnt work with the red line, try the blue line, they are probably just vsense + and vsense -

[wittekakker]

Got some good news and some bad news.

Bad news is, the variable resistor I've laying around seem to be dying :(

Good news: this is what caused the modification not to work. Had some more time today to find out what really went wrong, just got another VR on it today &#233; voila, variable GPU voltage :up:

No need for me to paint it out, Largon's picture is allready clear enough, VSEN+ to ground ;)

Have fun

[largon]

wittekakker,
Awesome!
I was really beginning to worry since first impression was it didn't work, I just couldn't see another way to do the mod and ofcourse since the mods are almost identical to those on 8800GTS/GTX it really put me off.
Whew!

Anyone planning on executing the vMEM mod?
i dont have a card, if it doesnt work with the red line, try the blue line, they are probably just vsense + and vsense -Good to know that. :)
Thanks!

[metro.cl]

the chip and legs is freaking small i'm afraid if i try to voltmod it i will kill the card :(

[GoldenTiger]

Nice!

EDIT: So just one point is needed such as the red one in the top-left of the picture in the OP (I read through the thread, looked like you had found a few spots) for this? It'll be my first time modding a GPU, I've soldered before but want to be sure before I put the iron to my pair of boards?

EDIT2: Would RadioShack have any suitable variable resistors? I don't see any in their online catalog :(, would hate to have to order them online for such a small item.

EDIT3: Would this work? http://www.radioshack.com/product/index.jsp?productId=2062300&cp=&sr=1&origkw=potentiometer&kw=potentiometer&parentPage=search

EDIT4: OK, and one REALLY stupid question, how exactly does a multimeter "clip on" to the measure points on this sort of board?

[largon]

GoldenTiger,
That one is single turn (revolves only <360&#186;). Not good because a single turn VR causes a really steep decrease in resistance once you tune it.
I always use multiturn Spectrol VRs for applications where accuracy of the resistance is critical.
Here's a good 500Ω 24 turn VR from Spectrol:
http://export.farnell.com/jsp/Passive+Components/Resistors,+Thermistors+&+Potentiometers/VISHAY+SPECTROL/64Y-501/displayProduct.jsp?sku=9608710

[GoldenTiger]

I always use multiturn Spectrol VRs for applications where accuracy of the resistance is critical.
Here's a good 500Ω 24 turn VR from Spectrol:
http://export.farnell.com/jsp/Passive+Components/Resistors,+Thermistors+&+Potentiometers/VISHAY+SPECTROL/64Y-501/displayProduct.jsp?sku=9608710

Any U.S. based vendors of that sort of thing? :)

[GoldenTiger]

One final thing... what exactly is the procedure for this? Solder the red point (or one of the orange optional points) to a wire, the wire goes onto the variable resistor while a ground-soldered wire goes onto the other leg of the VR? Set it to max resistance, and then... ? How do I measure the vGPU exactly, with a clipping multimeter leg? How do I determine the actual voltage with these cards? Sorry for so many noob questions, but better safe than sorry on this :).

[nordicpc]

"Out for delivery" my favorite phrase :cool:

So we're looking at a VR to get voltage increase? Any chances of a 8600GTS-like "Solder here and solder there" kind of mod? Also, what kind of core speeds are we looking at?

Cheers! and thanks a ton! Ya'll ROCK!

[GoldenTiger]

"Out for delivery" my favorite phrase :cool:

So we're looking at a VR to get voltage increase? Any chances of a 8600GTS-like "Solder here and solder there" kind of mod? Also, what kind of core speeds are we looking at?

Cheers! and thanks a ton! Ya'll ROCK!

My pair of cards are about 45 minutes away, being held at a UPS station because I paid for 3-day shipping, not 2-day, until tomorrow :mad: :mad: ... so stupid :(.

[largon]

One final thing... what exactly is the procedure for this? (...)Pretty much like you described.
First solder a wire onto the middle leg of a VR (they have 3 legs) and another wire onto either of the outer legs. Tune the VR to 500Ω. Solder one wire into a ground and the other to red/orange dot. Measure the circuit's resistance (should be close to 14.5Ω by now), easiest way is to probe the legs of the VR. Also, make sure the third (unused) leg doesn't touch 'n' accidentally short things.

Plug the card in and power up. Immediately measure the vGPU by sticking the black lead in molex ground and poke one of the vGPU measuring points with the multimeter's red lead. You'll see a bit over 1.1V. Tune down the resistor for more voltage. If you used a multiturn VR you will need to turn the VR's dial couple rounds before you start seeing results.

Any U.S. based vendors of that sort of thing? Sorry, I'm not very familiar with US based electronics resellers.
:(
So we're looking at a VR to get voltage increase? Any chances of a 8600GTS-like "Solder here and solder there" kind of mod? Also, what kind of core speeds are we looking at?The vGPU mod can be done by soldering a fixed resistor (valued <500Ω) instead of a VR...
But exact values for fixed resistors are not available ATM.

[GoldenTiger]

largon, I really appreciate your help. That makes things much clearer for me :)!

[jason4207]

Very nice information! I will have to try this once I get my new card (step-up from 320GTS...eVGA ROCKS!). I would like to see more results first, though. This is my 1st gfx card vMod. Good w/ a soldering iron, though. I modchipped my PS2, and Wii...had an R/C car when I was a kid as well.

So, 1.4v is safe for the GPU...how far can you push these things, and how easy is it to kill a chip? Should I just crank it to 1.4v, see how far I can OC (while observing temps), and then proceed w/ caution if I want more?

The memory mod sounds more dangerous. I know DRAM can fry easily, so I'm guessing vRAM is the same. 2.0v is safe, right? How dangerous is it to mess w/ the vRAM voltages?

How about shader clocks? Will the additional vGPU also allow me to OC the shader clock higher?

I've seen reports of 8800GT's running in the 60's and other reports of the cards running in the 90's. I'm not sure what to believe yet, but I'll know for sure when I get my card. I'm guessing a good aftermarket cooling solution is recommended for these vMods, correct? I'm thinking about getting the HR03.

I just got an email from eVGA, and they are ready for me to send in my 320GTS for step-up. I may have to wait for Monday...I don't want to go the weekend w/o my PC.

[GoldenTiger]

The stock vGPU on these is 1.1v, I wouldn't adjust it to 1.4 off the bat as a "safe" voltage if I were you :). You can cause damage to the chip, and with these, you can't just lower it back down to fix it like with a CPU usually. You will *definitely* need a beefy after-market cooler for a voltmod on these, the stock cooler can handle some overclocking but runs borderline scorching when doing so, let alone volt-modded. The HR03 would be an excellent cooler (make sure it's the NON-plus version, the plus one *doesn't mount* on these cards), just be aware it takes up a few slots. I'm personally trying a pair of Thermaltake ND1's, which are coming in with my two cards tomorrow:

Picture of it mounted on a 7900GT (Thermaltake ND1):

http://img463.imageshack.us/img463/400/thermaltakend1062xs1wf3.jpg

These should cool well for me :D, assuming they fit (which it looks like they will, but I can confirm tomorrow).

[wittekakker]

For VGPU, 500 Ohm VR is really good, almost no overvolting, less then with 8800GTS/X

[GoldenTiger]

For VGPU, 500 Ohm VR is really good, almost no overvolting, less then with 8800GTS/X

You mean when it is at max resistance, that is?

[wittekakker]

Lol, off course, what else do you suspect?

[MaSell]

For VGPU, 500 Ohm VR is really good,

Can I use 50k without big problems?

[GoldenTiger]

Lol, off course, what else do you suspect?

Just making sure ;). Would a 1k OHM work once adjusted? I can get those locally, would save me a lot of time and some money over ordering the stuff online.

[jason4207]

Golden Tiger - I followed you over here from OCForums, so I know all about it!

So it sounds like setting the 500VR to max is the best starting point. See how high I can OC at that vGPU, and then raise a little bit at a time. Once I start getting to the point where extra voltage doesn't seem to help more or temps get too high, stop. Is there a voltage I should definitely stop at no matter what?

I know these are new chips, but are there generally accepted guidelines like:
up to 1.2v is safe
1.2-1.4v should be OK
1.4+v is dangerous?

I said 1.4v earlier b/c of this post:



Everything else is like I expected. Especially the vGPU... Lot's of headroom to crank it up, the chip should take 1.4V with ease.

[GoldenTiger]

Golden Tiger - I followed you over here from OCForums, so I know all about it!

I said 1.4v earlier b/c of this post:

Sorry if I sounded rough with my post, it was not meant to be rude :). The general guideline you just outlined yourself should be right, though.

[jason4207]

Sorry if I sounded rough with my post, it was not meant to be rude :). The general guideline you just outlined yourself should be right, though.

You were fine (no roughness detected). I just found it funny the way you responded w/ your explanation of which HR03 to get. I was the main guy telling everyone over at OCForums that there are different versions of the HR03, and just b/c one review said "the HR03 doesn't fit" it was b/c they used the one designed for the GTS/GTX (HR03+), not the one designed for the 6/7 series (HR03-Rev.A). Rev.A "should" fit, but I may wait a bit and see if TR releases a specific version for the GT, to make sure I get the right sinks for the RAM and Vregs. Or I'll just buy a bunch of small sinks and make it work!

I should be good on slots. I plan on staying single-card. I have the P5K-Premium. Only PCI device is my Auzentech Xplosion sound card...I might get a HD Tuner card at some point, though.

Also your pic, which I've seen posted several times over there, made me laugh just b/c I've seen it so many times.

I can't wait to see your results! I may let you be my guinea pig if you don't mind. :p:

[GoldenTiger]

I just found it funny the way you responded w/ your explanation of which HR03 to get. I was the main guy telling everyone over at OCForums that there are different versions of the HR03Also your pic, which I've seen posted several times over there, made me laugh just b/c I've seen it so many times.

I can't wait to see your results! I may let you be my guinea pig if you don't mind. :p:

Ahhhhhhh LOL, I didn't realize you were the same person :). Yeah, that is pretty funny then :D.

I'll guinea pig... :yepp: :shocked: , but only if I can get the 1k ohm one locally and have it work I think, the cost because of minimum order + shipping is too high online at the place I found with 500 ohm VR's :(. Anyone know if the 1k ohm will work (i.e. could I just turn it to 500 ohms with the knob and it would work)?

[largon]

btw,
Is there someone kind enough to take a pic of the backside of the board of the area of the RAM chips? I could pinpoint vMEM measuring points if a pic was available.
Can I use 50k without big problems?I'm afraid no.
Such a high value VR would have way too big change of resistance per degree of rotation of the dial.
edit: Meaning dangerously steep, sudden increase of voltage after a certain amount of rotations.
Would a 1k OHM work once adjusted?1kΩ VR is OK.

[jason4207]

Does increasing vGPU allow you to OC shaders higher as well?

Golden Tiger - Do you plan on vModding the memory as well?

What do you guys think these cards are capable of w/ good aftermarket cooling, and some volt modding goodness? Any speculations? 850/2200/2200?

[GoldenTiger]

btw,
Is there someone kind enough to take a pic of the backside of the board of the area of the RAM chips? I could pinpoint vMEM measuring points if a pic was available.
edit: Meaning dangerously steep, sudden increase of voltage after a certain amount of rotations. 1kΩ VR is OK.


Great! I will take a picture of the backside tomorrow if no one has at that area, as that's when my pair comes in.


Does increasing vGPU allow you to OC shaders higher as well?

Golden Tiger - Do you plan on vModding the memory as well?

What do you guys think these cards are capable of w/ good aftermarket cooling, and some volt modding goodness? Any speculations? 850/2200/2200?


vGPU affects the entire core, including shaders.

I'm considering the vmem mod, yes.

Honestly, I saw someone who got up to 770ish with aftermarket air cooling but was volt-limited, had temps of 45ish load celsius, so who knows how high they could go with a voltmod... I have a hunch VERY high. Clocks like you are speculating would not surprise me :D!

[nordicpc]

Card's here, but I have work to do still for a few hours. Stupid job.

My first impression is that while I was able to do the easy part of the 8600GTS voltmod on two different cards, this one looks very cramped and very small. I'm quite scared to be honest. I think that unless we see some serious clock increases like we did with the G84, I'm gonna have to pass on this one.

Anyone have working clock speeds yet?

[VETDRMS]

Evga SSC is @ home on the table waiting. Will have some prelim numbers up tonight with vGPU and vMEM mods using an MCW-60 water block and Swiftech H20-220, single loop on GPU.

:cheers:

Edit: and some pictures, finally I get to use the Canon 40D on computer parts, should be a good night.

[GoldenTiger]

Evga SSC is @ home on the table waiting. Will have some prelim numbers up tonight with vGPU and vMEM mods using an MCW-60 water block and Swiftech H20-220, single loop on GPU.

:cheers:

Edit: and some pictures, finally I get to use the Canon 40D on computer parts, should be a good night.

AWESOME, can't wait for your post!

[cowie]

For VGPU, 500 Ohm VR is really good, almost no overvolting, less then with 8800GTS/X

hows your results?

[Jigsaw]

how heat sensitive are the resisotrs you solder to in order to read voltages?

[GoldenTiger]

So anyone with the mod done have any results clock-wise? I see a couple of people who have watercooling/aftermarket air-cooling hitting upward of 770-800mhz core without the mod, I'm darn curious how high these will go with more voltage.

:eek2:

[breakfromyou]

Will a VF-900cu be able to handle the wrath of G92?

stock/vmodded...either? no? maybe?

[GoldenTiger]

Stock, pretty well but it will probably max out... vmodded, not so sure :(.

[metro.cl]

Got some good news and some bad news.

Bad news is, the variable resistor I've laying around seem to be dying :(

Good news: this is what caused the modification not to work. Had some more time today to find out what really went wrong, just got another VR on it today é voila, variable GPU voltage :up:

No need for me to paint it out, Largon's picture is allready clear enough, VSEN+ to ground ;)

Have fun

Sorry to ask but which of both legs is Vsense+? could you upload a picture of the modded card.

Regards

[VETDRMS]

Hey, no 500ohm VRs around like I thought.

Stock metered voltages on SSC are vGPU-1.107 at desktop, 1.137 loaded; vMem-1.995.

With MCW-60 can run 800mhz core at 29-30C loaded.

Sorry, out of time, pics ect to follow this weekend.

[metro.cl]

11Ω (or 15Ω?) between vSense pin and ground is a horribly low resistance. I was expecting something around 45Ω since G80GTS/GTX which measures to 35Ω output 1.28v, and since the GT has lower vGPU thus the sense resistance should be higher than those on GTS/GTX as all use the same PWM IC. <20Ω is very low and IMO somwhat suspicious...

If someone is willing to be a guinea pig then I would suggest soldering a 500Ω multiturn VR between this point (http://www.xtremesystems.org/forums/attachment.php?attachmentid=66544&stc=1&d=1193813767) and ground. Before soldering measure the resistance between soldering points (should be ~15Ω), set VR at max resistance (500Ω), solder the VR, measure resistance between soldering points (should be ~14.5Ω, if much less don't turn the card on) tune down for more vGPU.

Damn i found a couple of VR but i think they are not good for the mod i got a 50kΩ and a 10kΩ VR here.

i'll have to find 500Ω VR but i think it will be hard :(

[VETDRMS]

I will probably just order a few from McMaster.

Someone asked about the SSC bios, and I think it was in this thread, so I attached it. The voltage identifier is 1.05 like the normal 8800. However, my vGPU and vMem are higher than normal.

[wittekakker]

hows your results?

Unfortunately this card aint mine, just did a quick research so to please the OC-community. No results, but I can tell you that I could increase to 1,2VGPU. Anyway, XS counts enough people owning such card, it will not take too long before those cards are running at 1GHz I suppose :)


Sorry to ask but which of both legs is Vsense+? could you upload a picture of the modded card.

Didn't picture it, you will have to take me on my word here :(
Vsen+ is the pin marked below:
http://i30.photobucket.com/albums/c306/oohms/misc%20oc/img0830bbbbbq5mod.jpg

[cowie]

so it only works to pin right??

[largon]

No, all these spots work.
If not, there's something wrong with the VR/other equipment.
http://www.xtremesystems.org/forums/attachment.php?attachmentid=66563&stc=1&d=1193851215

[nordicpc]

Heat is a killer on my card at least. On the first 3D '06 run I hit 83c. I pulled off the HSF and applied AS5, got down to 75c on the second run. I almost burnt my finger on the heatsink though. I guess those NVIDIA engineers who have been saying "We're good to 100c" are pushing it a bit here.

Needless to say, the card was very stable at 700mhz core, and ran through a '06 pass as high as 733. I couldn't get much more out of it without doing better cooling and maybe this volt-mod. We'll just have to see how the cores do with about 1.2v.

[Diverge]

Heat is a killer on my card at least. On the first 3D '06 run I hit 83c. I pulled off the HSF and applied AS5, got down to 75c on the second run. I almost burnt my finger on the heatsink though. I guess those NVIDIA engineers who have been saying "We're good to 100c" are pushing it a bit here.

Needless to say, the card was very stable at 700mhz core, and ran through a '06 pass as high as 733. I couldn't get much more out of it without doing better cooling and maybe this volt-mod. We'll just have to see how the cores do with about 1.2v.


i have no heat issues what so ever with my stock cooler, even overclocked >770/1800/1000. I think my last 3dmark run peaked at 72°C. The only thing you have to do to keep the heat down is max the fan @100%... of course it sounds like a hair dryer then, but i only do that for 3dmark runs.

edit: sorry to go off topic (volt mods)

[nosleep]

The problem is definitely the Overvolt Protection. The 8600gt/gts can hit 1000 core with volt mod's and no OVP.

[trans am]

lets see a shot of someones modded card.

[GoldenTiger]

The problem is definitely the Overvolt Protection. The 8600gt/gts can hit 1000 core with volt mod's and no OVP.

Didn't see anyone with a problem with OVP yet, can you link the post you're saying has the problem :confused: ?

[georgesod]

Well, are there any results yet?

[nosleep]

Didn't see anyone with a problem with OVP yet, can you link the post you're saying has the problem :confused: ?

Meant to post this in the 8800GTS thread

my bird

still though, I wouldn't be surprised if these GT's are restricted by the OVP

[cowie]

yes i see its working
last night i tryed but to no luck
i seen today that my ground wire was off.
testing 1.29 load now
thank you from me and the others who dont thank but use
best wishes
cow

[96redformula]

So what are you all hitting with increased volts?

[dinos22]

yes i see its working
last night i tryed but to no luck
i seen today that my ground wire was off.
testing 1.29 load now
thank you from me and the others who dont thank but use
best wishes
cowhey cowie

are you planning to put it on dry ice

if so are you able to tell us how much droop there is

also can you also let us know where the OVP limit is at if you are brave or crazy enough to stick a lot of volts into it....hence why i asked if you're on DICE :D

[cowie]

well i just had it at 1.55 3d and 3c
no blacksreen and i did not get the clocks i thuoght i might hit only benchmark stable at 810-825.
but its only been a few hrs
i'll start slow and backdown for 24/7 to 1.28 that did not effect temps much but gained me 50mgz on core
i just play around not going for the kill to early

[dinos22]

how much drop and droop are you seeing

1.55V :shocked: LOL

what cooling are you on

[VETDRMS]

Vgpu and Vmem installed.

With Vgpu at 1.155 loaded and vmem at 2.025 here is a prelim. I get slight artifacts at 820 core and 2000 shader.

So far so GOOD!

vGPU Will be heading north shortly...

:)

[dinos22]

PLEEEEEEEASE provide info on cooling and vdrop and vdroop you guys are seeing after the mod :) :up:

[jay_lee300]

nice clocks, what brand card do you have and what are the clocks, type of cooling is being used i have a gpu block and some ramsinks for the chips is there ne where else that needs to be cooled

[jay_lee300]

nvm about cooling just seen last page, nice temps on the swiftech block, ive got the same one going on, easy as just putting some as5 on and slapping block on?, heard the core can break easy cause its missing s shim or something that the g80 has

[VETDRMS]

nvm about cooling just seen last page, nice temps on the swiftech block, ive got the same one going on, easy as just putting some as5 on and slapping block on?, heard the core can break easy cause its missing s shim or something that the g80 has

If you are using the 7900GTX MCW-60 mount, do NOT tighten all the screws down like you usually do. The G92 core it taller and you will notice the "feet" on the mount do not touch the PCB when the waterblock is resting on the core.

I used the stock mount and slowly tightened the screws while checking the clearance between the feed on the GPU side and slowly pulled them down to where i felt the block both sat flat on the die (all feet approximately same clearance, slightly touching on outter edge possible due to flex) and did not exert too much pressure. You have to feel it out, LOL.

The rest of the cooling system is 1/2" line, Swiftech 220 radiator and MCW-650 pump. The CPU is air cooled at the moment.

:cheers:

Edit: This is the card. The ramsinks, and that mounting ring are from Viper John. I am using the MCW-60 at the moment as even with some good 90s I did not have room in my case for the X-Fi, so the top two ram chips now have low profile sinks on them to clear the barbs.

[VETDRMS]

PLEEEEEEEASE provide info on cooling and vdrop and vdroop you guys are seeing after the mod :) :up:

I am not seeing any vdrop/vdroop while running ATITool. Unloaded desktop vGPU is now 1.161v and loaded vGPU goes from 1.198v to 1.201v.

Prelim Results at 1.2v

[dinos22]

excellent news

what was you gain in 0.5v increments can you give us a rough idea

[VETDRMS]

Here is 5 minutes of ATITool at 848mhz core. The next step up for ROP is 864mhz. ATITool runs without errors but you can see the occasional yellow pixel.

Current vGPU is 1.260v. The memory is pretty much crap, not sure if Nibitor is reading the right timing set but I will probably loosen the timing up and see if there is anymore headroom in them.

Not so bad, too bad the system it is in can't keep up with the card. :rolleyes:

:cheers:

[dinos22]

excellent man

really excellent

you are not wrong about system not being able to keep up

you'll need a bloody 4.5Ghz+ Quad to just start to keep up :D

[VETDRMS]

That 900mhz is just teasing me. I'm not quite ready to go over 1.3v yet, gonna play some games for a bit first at this setting.

When I say the system can't keep up, I mean it. LOL

FX-60 @ 3ghz
DFI NF-4 Ultra
2GB G.Skill DDR @ 550mhz, 3-4-4-8

Been holding out for Penryn, Phenom looks like a turd so I'll be building a system in the coming months. My 3Dmark05 score does not change between 700mhz and 800mhz... :rofl:

[dinos22]

When I say the system can't keep up, I mean it. LOL

FX-60 @ 3ghz
DFI NF-4 Ultra
2GB G.Skill DDR @ 550mhz, 3-4-4-8


zOMG my condolences :D :rofl:

[jason4207]

Is your shader still at 2GHz? Or did you get it higher?

So, voltage isn't helping the vRAM get any higher than 1GHz? What voltages have you tried?

[VETDRMS]

Is your shader still at 2GHz? Or did you get it higher?

So, voltage isn't helping the vRAM get any higher than 1GHz? What voltages have you tried?

Yeah, shader is at 2000mhz. Next shader step is 2064mhz which shows some artifacts in ATITool. vRAM is currently at 2.015v. 2.056v did nothing, have not tried higher. With VDDQ tied to VDD on these cards it will probably freak out around 2.1v and at 2.056 it does nothing so I'm not too hopeful there.

EDIT: Hey, looks like the timings that are used in the bios are actually for Samsung GDDR specs. They are a lot tighter than the Qimonda data sheet timings for 1ns chips. I am going to loosen a few timings in the bios and see if it helps the memory OC.

[VETDRMS]

zOMG my condolences :D :rofl:

Hey now, it still gets the job done. ROFL

Seriously though, at 700mhz core my 3DMark05 score is the same as it is at 800+mhz core. :shrug:

[metro.cl]

Awsome results, could any of you run some 3dmarks to see how well the card does and scales.

850MHz on the core is huge, i also think this GDDR3 is crap hopefully someone will use another brand.

[cowie]

dinos
rememer card does not droop /drop at load
umm 3c cooling lol
in a few minutes a zalman vf-1000 with modded fan

[georgesod]

So VETDRMS can you show us some pictures of the mod? What's the right way to do it? Also what vr did you use for vgpu and vmem?

[GoldenTiger]

Amazing results... I half-want to try the mod, but A) I don't think my Thermaltake ND1's will keep up, and B) I'm honestly worried I would kill the cards trying due to the tiny size of the solder point and adjacent components. GRATS and keep us posted :D!

[VETDRMS]

Awsome results, could any of you run some 3dmarks to see how well the card does and scales.

850MHz on the core is huge, i also think this GDDR3 is crap hopefully someone will use another brand.

The benchmarks wouldn't mean much on my system, it is way outpaced by the video card. Sorry. :shrug:

[GoldenTiger]

After some advice from you, I could probably hit it I think now, was picturing a different method in my head. The big question mark is, would my cooler keep up? Think stock-8800GTX cooler, it's basically the same thing.

[VETDRMS]

So VETDRMS can you show us some pictures of the mod? What's the right way to do it? Also what vr did you use for vgpu and vmem?

Sure. I would normally not use the Radioshack VR but I had none around that were low enough.

I used 50K on the vmem as my card came with stock VDD of 1.95 and a 20K bumped that up to 2.056 right away. The 1K on the vGPU is only a 15 turn but the vGPU increments are still fine. It would look better if I had the Bourns type. Oh well.

:up:

[largon]

VETDRMS,
I take you glued the VRs the PCB?
Solder alone won't hold them...
:)

[VETDRMS]

VETDRMS,
I take you glued the VRs the PCB?
Solder alone won't hold them...
:)

I used some strong double stick adhesive. Has worked well all the way back to my poor 9700Pro. :ROTF:

[metro.cl]

Sure. I would normally not use the Radioshack VR but I had none around that were low enough.

I used 50K on the vmem as my card came with stock VDD of 1.95 and a 20K bumped that up to 2.056 right away. The 1K on the vGPU is only a 15 turn but the vGPU increments are still fine. It would look better if I had the Bourns type. Oh well.

:up:

That vmod looks a lot easier i might try it i only need to get the 1k VR :)

Your Vram doesnt seem to overclock over 1000mhz is that right? i can bench at 1040mhz stock volts

[VETDRMS]

That vmod looks a lot easier i might try it i only need to get the 1k VR :)

Your Vram doesnt seem to overclock over 1000mhz is that right? i can bench at 1040mhz stock volts

Yes, it craps out at 1026mhz, even at 2.025v. :rolleyes:

[VETDRMS]

Man, this memory sucks. I loosened the timings to Qimonda spec (the stock bios is closer to Samsung 1ns spec - come on partners, put Samsung in the board). And even at 2.075v Mem it craps out real fast at 1044mhz.

That being said I seem to have hit a new problem. The core will not clock over 864mhz. No matter how high I go in the overclock setting in RivaTuner the ROP clock stays at 864mhz. :shrug:

Anyone else been this high?

[VETDRMS]

Well, the shader seems to like the extra voltage. 2052mhz shader is 100% stable, while the core seems mostly stable at 864mhz. As I mentioned before I can't go any higher with Rivatuner, it will not change ROP over 864mhz.

Shader will run for a while at 2104mhz, but will artifact after a minute or so.

I'm pretty impressed, at 1.315v its rocking!

[Chris']

oh my god thats just sick..thanks for your sharings...gonna get this card soon.

btw: whats the best avaible cooler for 88gt? air cooler, i mean.
and: may it be too risky putting the voltage on something like 1.3v when cooling with air?

thanks for your reply!

[hstuehmeyer2000]

may it be too risky putting the voltage on something like 1.3v when cooling with air?

i would say so

[GoldenTiger]

i would say so

What do you think of say 1.2v-ish? I'm planning on doing the voltmod, but there's no reason to if it's gonna just make it overheat on me and give me no gain that way :p.

VETDRMS, that's bad luck on the memory :(... on stock voltage on mine still, and I get up to 2100 (1050) stable easily, haven't tried higher yet.

[dinos22]

you are very lucky with your shader clocks there not to mention core

:up:

[dinos22]

no point touching RAM so maybe back down in case you kill it

goes out to finder a soldering iron and 1K VR :D:D:D:D:D

what do you guys suggest in terms of soldering irons

i want 1GHz core :D:D:D:D: and some dice :D is that too much to ask :rofl:

[VETDRMS]

Hey, the next step from 864mhz for setting the ROP clock is 918mhz. No go there, instant hard lock. LOL

I am having some memory problems at the moment. :(

With the high ROP/Shader clock it will artifact at 1000mhz. At 900mhz memory its rocks table. Ran loops of 3DMark at 864/2106mhz at 1.281v with no problem.

If your going to drop some dry/ice LN2 on it, I think 1ghz won't be a problem at all.

Shader will go as high as 2160 mhz now, but will artifact a bit.

Also, Nibitor is reporting some strange memory timings when I try to make changes and flash the bios. The settings don't get set right or Nibitor isn't readin them right, just FYI.

[GoldenTiger]

LOL @ 918mhz being the next step :eek:.

Still trying to debate with myself if my cooling will be enough, if so I'm gonna do it :D.

[NJDevilsFan21]

What are the chances that we see some super easy conductive ink mods?

[VETDRMS]

What are the chances that we see some super easy conductive ink mods?

IMHO the soldering is super easy. LOL


Oh, by the way, I wouldn't waste your time with the vMem mod. The Qimonda chips on my board at least hate high VDD, most likely due to the VDDQ voltage being tied in with VDD. Even at 2.020v it would freak out at 1000mhz. I unsoldered the VR and now at 1.995v (stock form EVGA is high for some reason) the memory is fine at 1000mhz.

So, final stable clock for now in games/3DMark ect is 864/2106/1000.

[oohms]

What are the chances that we see some super easy conductive ink mods?

Zero, lol, this doesnt use the same method that the 7900gt/gs use :D

Hey how hot do the voltage regulators get when you run 1.3v GPU?

[GoldenTiger]

Nice :D.

I really want to do this mod, but not positive my cooling'll handle it. Take a look and let me know :)? Also, should I sink the MOSFETs/etc.? I'm hitting pretty good clocks but I'm wondering if doing so would let me get further, especially if/once I do the vGPU mod.

http://img139.imageshack.us/img139/5736/8800nd12tc5.jpg

[theteamaqua]

nice, but i intend to keep my warranty, therefore no vmod...

unless there is a pencil vmod , which is irreversible

[uwackme]

Proper soldering iron would be Weller EC3001 or equivalent.

Source in US for parts... pots, etc is Digikey.

Go to Radioshack and get some KYNAR 30ga rework wire. Use it for these things. Makes for much cleaner work, and easier to work with SMD. Also, look into getting a nice magnifying ringlight, makes it alot easier to work on tiny SMD stuff.

[VETDRMS]

GoldenTiger:

I don't think 1.175 or 1.200v would be a problem, those are some decent heatsinks. My stock SSC was 1.137 on the single slot cooler.

Unless you like the smell of roasted mosfet I would advice you install some sinks on them. They do get pretty hot and when you up the voltage they will get much hotter. The copper sinks on my mosfets get up to around 122F.

So, what kind of clocks are you getting??? :)

[NJDevilsFan21]

Zero, lol, this doesnt use the same method that the 7900gt/gs use :D

Hey how hot do the voltage regulators get when you run 1.3v GPU?

Damn, but conductive ink... if you ever destroy the card you pull out the acetone and bam it never happened! :(

I want to put the FC-ZV9 that I have on my 7900GT, but I have to break 75C with stock cooler, fan set to 70&#37; with 720/1836/2000 clocks at 73F room temp. I just don't have any extra ram sinks for the mosfets.


Unless you like the smell of roasted mosfet I would advice you install some sinks on them. They do get pretty hot and when you up the voltage they will get much hotter. The copper sinks on my mosfets get up to around 122F.

You are also running 864MHz on the core and 2100MHz shader!! :eek:

Right now the only possible vmod for me is if that BIOS soft mod from 1.05V to 1.1V actually works, or else I'll just forget about it. Crysis now runs well all settings high, that's all I care about.

[GoldenTiger]

GoldenTiger:

I don't think 1.175 or 1.200v would be a problem, those are some decent heatsinks. My stock SSC was 1.137 on the single slot cooler.

Unless you like the smell of roasted mosfet I would advice you install some sinks on them. They do get pretty hot and when you up the voltage they will get much hotter. The copper sinks on my mosfets get up to around 122F.

So, what kind of clocks are you getting??? :)

Music to my ears :D.

No, thank you, but I prefer french vanilla coffee if anything has to roast :p . I'll remount and put sinks on those MOSFETs tomorrow :), and do the mod soon (getting a new PSU in to make sure I'm not being power-limited, seems iffy).

The max clocks I can do right now are 736/1836/2100 core/shader/ram in SLI... I have a feeling more power would help, because if I overclock even one ROP notch above this, the screen goes black, flickers on a couple seconds, etc., seems like a power issue even on the overclock limiting me, let alone the system/performance.



Damn, but conductive ink... if you ever destroy the card you pull out the acetone and bam it never happened! :(

I want to put the FC-ZV9 that I have on my 7900GT, but I have to break 75C with stock cooler, fan set to 70% with 720/1836/2000 clocks at 73F room temp. I just don't have any extra ram sinks for the mosfets.

You are also running 864MHz on the core and 2100MHz shader!! :eek:

Right now the only possible vmod for me is if that BIOS soft mod from 1.05V to 1.1V actually works, or else I'll just forget about it. Crysis now runs well all settings high, that's all I care about.

Haha, I guess that's one way of thinking of it :D! I have RAMsinks since they came with my coolers, they're perfect height too :)... didn't own any otherwise, but each ND1 came with 4, so that's plenty. I bet having those high clocks sure help the power circuitry heat up. As far as the BIOS soft-mod, it turns out 1.05v is "idle" and 1.1v is "3d-mode" normally, so there is no soft-mod currently thought of.

[GoldenTiger]

Just ordered a nice, hefty PSU, it should be here Tuesday, which is when I'll probably do the voltmod, if I can push the CPU up easily :D. Otherwise I'll do it later once I've sorted that bottleneck out.

Getting this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

[Lastviking]

Anyone know if all brands use Qimonda mems on all 8800 gt cards? , and i wonder one more things also can a new bios or something remove the big overclocking steps?. The clocks steps are realy to big.

GoldenTiger what psu do you using? and are you trying to clock in sli?

[largon]

Clock steps, I believe, are what they are because of the clock crystal used on the board. No amount of BIOS modding will change that. Only would be to desolder the stock crystal and replace it with a smaller one and voil&#225;; you got lower steps.
The crystal on GT looks like an all-metallic rectangle chip and it's located near the GPU, just by it's left side.

[Marco André]

Impressive grapich card! Congratz to all for the results :up:

[theclash]

864 core and 2000+ on shader?!?!?

maybe I'll have to retire my 6800 after all

[pinto]

Hi,

Stock cooling with 1.180v i break the 16K barrier:

http://img521.imageshack.us/img521/5430/3d06160878800gt1di9.jpg (http://imageshack.us)
http://img521.imageshack.us/img521/5430/3d06160878800gt1di9.dd6bb9d6ca.jpg (http://g.imageshack.us/g.php?h=521&i=3d06160878800gt1di9.jpg)

only 70&#176;c with fan at 100&#37;

[trans am]

Just ordered a nice, hefty PSU, it should be here Tuesday, which is when I'll probably do the voltmod, if I can push the CPU up easily :D. Otherwise I'll do it later once I've sorted that bottleneck out.

Getting this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

waste of money. You would've been better off with this single 12v rail@ 41A
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004

[dinos22]

waste of money. You would've been better off with this single 12v rail@ 41A
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004

why?

[kiwi]

Nice :D.

I really want to do this mod, but not positive my cooling'll handle it. Take a look and let me know :)? Also, should I sink the MOSFETs/etc.? I'm hitting pretty good clocks but I'm wondering if doing so would let me get further, especially if/once I do the vGPU mod.

http://img139.imageshack.us/img139/5736/8800nd12tc5.jpg

So ND1 fits 8800gt fine?

[Diverge]

So ND1 fits 8800gt fine?

you either have to mod the card by removing the fan connetor, or cut a notch in the heatsink of the cooler for the fan connector to sit in. I notched my heatsink. It's pretty easy, 2 cuts with a hacksaw.

[Eagleclaw]

Ahh didn't know you can notch the heat sink, got any pics?

edit: Just noticed your pics in another thread, you cut the copper part away is that correct?


thanks


you either have to mod the card by removing the fan connetor, or cut a notch in the heatsink of the cooler for the fan connector to sit in. I notched my heatsink. It's pretty easy, 2 cuts with a hacksaw.

[GoldenTiger]

Ahh didn't know you can notch the heat sink, got any pics?

edit: Just noticed your pics in another thread, you cut the copper part away is that correct?


thanks

Yep, that's what he did. If I had thought of a hacksaw (DOH!!!!) I would have done the same :rofl: . It amazes me that I didn't for some reason.

[dinos22]

Yup, vMEM is definitely pencil modable and actually, vGPU should be too if you're careful. BUT a multimeter is a MUST for a safe vGPU pencil mod... The resistor is awfully tiny but it is doable, it's possible because the affected resistor has higher resistance than on G80GTS/GTX thus pencilling is easier.

The modable resistor for vGPU is the one marked with numbers 2 and 4 (http://img89.imageshack.us/img89/5458/g92vgpumodtraces1234kx8.jpg), but I need measuments of the requested points to be able to calculate the target values for VRs / pencil resistance.

hmmm might be worth looking into

what sort of resistance should we be looking at for "safe initial test"???

[largon]

dinos22,
The problem with pencil vGPU mod is the low resistance between vsense and ground. Pencil vGPU modding was quite difficult on G80GTS/GTX eventhough their vsense_pin-2-ground resistance was 35Ω and since G92GT's vsense reads even lower (15Ω) pencilling becomes one step more difficult. 15Ω is awfully low to be penciled; it leaves very little room for error. Vsense-2-ground resistance could easily dip way too low consequently yielding a dangerously high vGPU.

But ofcourse, there's nothing that really prevents from experimentally pencilling the little bugger and measuring the resultant resistance, no harm done there. Just remember to apply pencil very slightly, and do not power up the card blindly without being sure the resistance doesn't get too low. And since I don't have the card I can't tell how low a resistance yields what vGPU. Hence, I have no idea what are safe resistances. We need someone who has done the VR mod to provide resistance readings...
People who have done the mod with VR: How low Ω between the vGPU mod solder points @ 1.2V / 1.3V / 1.XV?)

!CAUTION, UNTESTED MOD! READ THE ABOVE TEXT BEFORE MODDING!
Here's the pencillable resistor (optionally, you can pencil the one next to it on the right side):
!CAUTION, UNTESTED MOD!
66784
!CAUTION, UNTESTED MOD!

[dinos22]

i think pencil modding *looks* to be a bad idea and maybe some extra loud warnings are necessary in posts referring to it i think

[largon]

Now, if some were to unsolder those two resistors and measure their values we would know if the pencilmod is safe... If we're in luck the other resistor would be low value (close to 15Ω) and the other considerably higher (some couple hundred Ω), if this was the case penciling the higher rated resistor wouldn't result in dangerous resultant resistance thus pencilmod would be safe.
Anyone?
:P

[T_M]

Dino, as a starting point any $10 30W soldering iron will do, as long as the tip is nice and pointy.
Get yourself some fine roll of solder and you are off and away :)

[nordicpc]

Very nice clocks guys, at those speeds we're looking at twice my G84.

I may have to be the first to try a pencil mod. Just try to change it a hair and see what happens. I'll let ya'll know if I get bored tonight.

At stock everything but fan speed, my XFX seems to like 733/18xx/1050 just fine, but another 10% wouldn't hurt if it's easy to come by.

[winbond]

Thanks for figuring out the volt mods.

I did this voltmod, and almost destroyed my card.
I'm actually surprised it is still working.
I have soldered many times before and have a good soldering iron but the wire i used was too thick and it ripped off couple times, taking the soldering points with it, and those resistors are really small too, but should be better next time around

ok so i turned it up to 1.35v and the stable overclock i got is 864/2106/970

the next step is 879.5 for the core and 2160 for the shaders, both unstable with this voltage

the ram is really bad, only got few mhz out of it, i can bench it @1025 but it's unstable in games

i wonder if it can go any higher with more voltage,
but i want to play couple games before i fry it :yepp:

[dunn2953]

what are your temps and what type of cooling do you have?

[winbond]

watercooling with maze4 gpu block, heatsinks on ram (useless) and vregs,

idle 36 load 45

[npk]

watercooling with maze4 gpu block, heatsinks on ram (useless) and vregs,

idle 36 load 45

does the maze4 fits without any modification? also guys, so far what vgpu would you consider "safe" (please don´t say stock) for 24/7 on water?

[winbond]

yes, the maze4 gpu fits without any modification, 24/7 voltage? i don't know but i would say if everything is cooled well 1.3v shouldn't be a problem

[Renegade5399]

Guys, listen up. Running the memory at 2000 or higher for long period of time can be an issue.

See here:

http://www.hardforum.com/showpost.php?p=1031607668&postcount=13
And here:

http://i4memory.com/showthread.php?t=5030

Sorry if linking across forums is taboo, but it's important. You can slowly kill the memory running it over 2k.

EDIT: I have been debating on an 8800GT or the new ATI offering. Since my volt modded 7900GT was so good to me I think I will go with the 8800GT as well. Just wanted to get this post up for you guys.

[Garrett]

Just like I thought... 256-bit ;)
Still these cards clock like crazy...hmmm tempting :up:

[winbond]

just want to post an update, 849/2052 is the highest stable clock regardless of voltage, i went up to 1.47v

the 864/2106 is stable in crysis and benchmarks, but unstable in stalker,

my ram actually maxes out @ 956, im pretty sure the cards that came with 1000 ram clocks are unstable since its the same ram, voltage and timings

[winbond]

......ok , new discovery, at anything over 1.3v the card crashes, so i suggest you stay around 1.3 max for now, unless you have some super cooling,

(to me) it looks like some component on the card is overheating, my max overclock plays fine for 2/5 minutes then crashes. i have the heatsinks on all vregs and a big fan blowing on it so those are fine and my core is @ 45 so it's got to be something else.

if you are able you should test the temps of all the components on the card during load, i have no room to work with at all and don't have a good thermometer either

[d44ve]

I think I am going to have to give this a shot tonight. I will report back to you what I get.

[VETDRMS]

......ok , new discovery, at anything over 1.3v the card crashes, so i suggest you stay around 1.3 max for now, unless you have some super cooling,

(to me) it looks like some component on the card is overheating, my max overclock plays fine for 2/5 minutes then crashes. i have the heatsinks on all vregs and a big fan blowing on it so those are fine and my core is @ 45 so it's got to be something else.

if you are able you should test the temps of all the components on the card during load, i have no room to work with at all and don't have a good thermometer either

I had no issues running at 1.320v, but there was no need to as I am now 100% stable at 864/2106 at 1.281v. It probably varies by card, my loaded temps at 1.320v were 33C.

[Hazaro]

I had no issues running at 1.320v, but there was no need to as I am now 100&#37; stable at 864/2106 at 1.281v. It probably varies by card, my loaded temps at 1.320v were 33C.

How many minutes stable is this?
Is it possible to run some under AtiTool 0.27?
Can you open up Crysis (Not benchmark, get some explosions in there) and play for over 15 minutes?
Any other games?

It just seems to good to be true, I am looking into doing one of these as I have a Accelero S1 cooler and my load temps are only 52C atm with 713/1728/948 clocks. (713 = Crysis stable [As in blowing up 40 trucks at a time and detonating 3 nukes simultaneously]) 740/1890/948 = UT3 Stable.

Of course clocks for Crysis are the only things that matter :lol2:

That's for all the stuff you've ran so far. :up:

p.s. Where can I order a 500 Ohm variable multi turn resistor cheaply from California ;)

[VETDRMS]

:up: [QUOTE=Hazaro;2539122]How many minutes stable is this?
Is it possible to run some under AtiTool 0.27?
Can you open up Crysis (Not benchmark, get some explosions in there) and play for over 15 minutes?
QUOTE]


30 minutes in ATITool, 6 hours in WoW at 1650x1050 8xAA, 30 minutes or so in NFS: Pro Street, Loops of 3Dmark05/06. I have done 6 loops or so of Crysis timedemo too, no artifacts/locks, ect..

[nelsmar]

500 ohm variable multi turn restistor: Radioshack. in their lil bins in the middle of the store that hold resistors led's etc etc. they should have some VR's there i bought a 10k and 500 from there.

[Hazaro]

:up: [QUOTE=Hazaro;2539122]How many minutes stable is this?
Is it possible to run some under AtiTool 0.27?
Can you open up Crysis (Not benchmark, get some explosions in there) and play for over 15 minutes?
QUOTE]


30 minutes in ATITool, 6 hours in WoW at 1650x1050 8xAA, 30 minutes or so in NFS: Pro Street, Loops of 3Dmark05/06. I have done 6 loops or so of Crysis timedemo too, no artifacts/locks, ect..

Awesome.

How are you measuring GPU voltage? (multimeter?)
If so, isn't there something to be concerned about putting extra current or something along the lines? (Or am I thinking about other extremely sensitive components?)

I was under the impression that the ones at RadioShack were single turn?
I wanna get this done :D

Thanks so far guys.

[nelsmar]

the one i got from radioshack def wasnt single turn. its a blue rectangle. i dont ahve the box hadny otherwise ide snap you a shot of it :) they should have one even if its not online just ask for a multi turn VR or call them up and haev them check. its onyl a dollar or two as well

[Mysterfix]

I just picked up a 1k-ohm VR from radioshack and it's a 15 turn so I think it should be ok.

[Hazaro]

So I checked my card again.

That point is ridiculously small.

I have almost no soldering experience so I'm a "bit" hesitant to do this. :yepp:

I shall wait longer :(

Work on my CPU lol...

[Mysterfix]

I'm going to be doing this with no solder at all.

How?

Well I know a little trick with conductive ink and superglue. Simply put you mix up a solution of conductive ink and superglue (gel type works best). Preattach your VR to the card with some double sided tape so it doesn't move around and make sure you prebend one leg of your VR so it makes conact with your solder point when you attach it with the double sided tape.

Once you have the VR in place simply apply the glue solution with a safety pin or any other small tip you happen to have handy and waite for it to dry.

You should also preattach the ground wire to your VR before you place it on the board and follow the same steps above to attach the other end to ground.

[Hazaro]

I'm going to be doing this with no solder at all.

How?

Well I know a little trick with conductive ink and superglue. Simply put you mix up a solution of conductive ink and superglue (gel type works best). Preattach your VR to the card with some double sided tape so it doesn't move around and make sure you prebend one leg of your VR so it makes conact with your solder point when you attach it with the double sided tape.

Once you have the VR in place simply apply the glue solution with a safety pin or any other small tip you happen to have handy and waite for it to dry.

You should also preattach the ground wire to your VR before you place it on the board and follow the same steps above to attach the other end to ground.

At the surface it doesn't seem like it would give a solid connection or conductivity if you mixed in superglue with conductive pen, is the distance just negligible? We aren't talking about a lot of volts here.

Although I guess you could always lower or raise the resistance to accommodate.

But what do I know :rolleyes:

How many times have you done this before? Does a liquid superglue really matter? ;)

[Mysterfix]

All I'm doing is making the connections with the resistor using the conductive ink solution instead of solder. I've done it on a couple of cards, X800XT and 7800GT were the latest. The gel type dries slower giving you more time to work with it and it doesn't run.:up:

[jason4207]

So I checked my card again.

That point is ridiculously small.

I have almost no soldering experience so I'm a "bit" hesitant to do this. :yepp:

I shall wait longer :(

Work on my CPU lol...

Find an old PCB and practice. :up:

[Hazaro]

Find an old PCB and practice. :up:

Hey Jason :)

Joining the migrating flock are we? :D

I need:

Soldering iron
Multimeter
Solder
Old PCB

:up:

***

I realize what you are doing with the pen, but I was wondering if the superglue + ink would weaken the conductive properties of it.

I need to get some double stick tape and a pen now. Off to RadioShack I guess. Oh, and a multimeter:rolleyes:

[HighT3ch]

Has anyone tried to increase vgpu through bios mod. I increased the stock bios' 3D voltage with Nibitor to 1,22v and flashed it back to my card. It appears to be working as I get far more stable core clocks over 700MHz and up to 800MHz. I guess the voltage increase is small (I didn't have the time to measure it with a DMM) but is probably not even close to the set value. When I'll get home I'll measure it so not to speak hypothetically.

[winbond]

how did you increase the voltage in bios to 1.22v when the highest available voltage is 1.1v?

[d44ve]

I'm going to be doing this with no solder at all.

How?

Well I know a little trick with conductive ink and superglue. Simply put you mix up a solution of conductive ink and superglue (gel type works best). Preattach your VR to the card with some double sided tape so it doesn't move around and make sure you prebend one leg of your VR so it makes conact with your solder point when you attach it with the double sided tape.

Once you have the VR in place simply apply the glue solution with a safety pin or any other small tip you happen to have handy and waite for it to dry.

You should also preattach the ground wire to your VR before you place it on the board and follow the same steps above to attach the other end to ground.


That is defenitly an idea

[jason4207]

Hey Jason :)

Joining the migrating flock are we? :D


Yes sir!

This is where the volt-mod action is! :yepp:

[HighT3ch]

winbond there is an option in Nibitor that enables you to modify voltages for the bios in process. Go to Tools > Voltage Table Editor

[jason4207]

winbond there is an option in Nibitor that enables you to modify voltages for the bios in process. Go to Tools > Voltage Table Editor


Have you tested this w/ a DMM yet to confirm it's working?

[Hazaro]

We need pics!

Off to Radioshack now to see if I can pick up anything.

[VETDRMS]

[QUOTE=VETDRMS;2539282]:up:

Awesome.

How are you measuring GPU voltage? (multimeter?)
If so, isn't there something to be concerned about putting extra current or something along the lines? (Or am I thinking about other extremely sensitive components?)

I was under the impression that the ones at RadioShack were single turn?
I wanna get this done :D

Thanks so far guys.

Sorry for the delay in getting back to you. Yes, I meter with a multimeter. There is virtually no risk metering the voltage using a decent multimter.

The blue 1kohm pots from radioshack are 15 turn. I posted a picture of the mod, VRs included a few pages back. I prefer to use Bourns 25turn pots, but time was of the essence.

:cheers:

[Hazaro]

[QUOTE=Hazaro;2539356]

Sorry for the delay in getting back to you. Yes, I meter with a multimeter. There is virtually no risk metering the voltage using a decent multimter.

The blue 1kohm pots from radioshack are 15 turn. I posted a picture of the mod, VRs included a few pages back. I prefer to use Bourns 25turn pots, but time was of the essence.

:cheers:

I guess $20 radioshack aren't quality :)

I will worry about the multimeter later, I picked up the 15 turn 1kOhm resistor from radioshack, had to visit two to get it. Neither had conductive ink pens, as well as the local hardware store. Internet time for me.

*also what &#37; superglue / ink pen?

[JKDC]

Does anyone have resistance readings for voltages? I have the 1k VR from Radio Shack and would like to know what value to preset the resistance. 1.2 volts would be a good start and 1.3 a good ending.

I replaced the stock heatsink with the Thermalright V2 and have 48C load so I have 20C to play with now. :) It looks like 1.2 volts will be safe, maybe even 1.28 as was posted earlier. So if someone could give resistance readings it will be much appreciated and would benefit future posters/lurkers as this could be a very popular mod soon. Thanks VETDRMS/largon and others for posting pics.

[VETDRMS]

Does anyone have resistance readings for voltages? I have the 1k VR from Radio Shack and would like to know what value to preset the resistance. 1.2 volts would be a good start and 1.3 a good ending.

I replaced the stock heatsink with the Thermalright V2 and have 48C load so I have 20C to play with now. :) It looks like 1.2 volts will be safe, maybe even 1.28 as was posted earlier. So if someone could give resistance readings it will be much appreciated and would benefit future posters/lurkers as this could be a very popular mod soon. Thanks VETDRMS/largon and others for posting pics.

Always start out at the highest resistance and work your way down. So, attach the VR at 1k-ohm. Measure vGPU on startup, and adjust accordingly. Some people don't like to make adjustments while the system is powered up but I have never had a problem with it, just make them slowly. Give the VR a slow full turn and see how much vGPU went up. This is a decent gauge for adjustments, but keep in mind it will not stay linear. As you approach 0-ohms (lets hope you don't) it will go up much faster.

A little patience goes a long way, but not too much patience. LOL

Edit: I would not recommend the conductive ink/superglue as you will find that the attachment points for vGPU are VERY close together. If you can be 100&#37; certain not to get it spread out, maybe. Soldering is not difficult, it just takes some practice, so find a dead board or an old soundcard or something and practice. Too much heat will kill those small thin-film resistors we are soldering to, just keep that in mind.

[JKDC]

Can't I start it at 500 ohms? It was stated earlier in the thread that a 500 ohm would work also. I hooked it up to my MultiMeter and it took me 2 minutes of cranking to go 250 ohms. LOL It would be nice to set it closer to the actual value I need.

[HighT3ch]

Have you tested this w/ a DMM yet to confirm it's working?

Jason no, not yet - didn't have the time. I'll do it during the weekend as I'll have more spare time. All I can say for now is that it actually affects the OCing ability but I don't know any real voltage figures.

[largon]

Can't I start it at 500 ohms? (...):yepp:

[JKDC]

Has anyone tried to increase vgpu through bios mod. I increased the stock bios' 3D voltage with Nibitor to 1,22v and flashed it back to my card. It appears to be working as I get far more stable core clocks over 700MHz and up to 800MHz. I guess the voltage increase is small (I didn't have the time to measure it with a DMM) but is probably not even close to the set value. When I'll get home I'll measure it so not to speak hypothetically.

I can confirm that this is working. I tried 1.25 and 1.3 but got the same results. I now set it to 1.2 volts and have the same OC. I imagine this only goes to 1.15 on the card. My OC went from 702/1722 to 756/1836. I set the lowest voltages to 1.1 and the two highest to 1.2. You have to edit the voltages before they show in the table. My temps went up 2C idle and 3C load with a thermalright V2 cooler. With stock cooling you better have the fan speed up to 50&#37;+ before trying this.

It's still not enough to stop the vmod unfortunately but it is free and easier. Make sure you have the latest NBitor (v3.5a) and NVflash (v5.57). Previous versions don't support the 8800GT. Use the thread on extreme bios mod for the 8800GT for switches and floppy DOS image. Remember to back up original BIOS first and have a spare PCI card just in case you need to flash it back.

[Merc1212]

JKDC - that's great news. I was getting ready to do the voltmod, but I'd be happy with another 50mhz from just the bios mod. Can you confirm how much more voltage it is sending with a dmm? Which brand of card are you using?

Thanks!

[aznsniper911]

In the picture I see a Vmem mod but no Vcore mod, so I'm assuming there isn't out one yet for the pencil?

[winbond]

i sold my card, the core overclocks well but i think the design of the card is too weak to sustain high voltage and overclocks for long periods of time,

i read that there are new galaxy and palit 8800gt with 3 phase power, i will be hunting for one of those and hope it comes with better ram, should be interesting

[Unseen]

Only vgpu mod @ 1,22v and on water.
http://xs121.xs.to/xs121/07456/84213.jpg (http://xs.to)

[Achill3uS]

Thx for the mods guys, I'm ready to testing :D

[Hazaro]

Thx for the mods guys, I'm ready to testing :D

Any chance we an get bigger and closer pics?

I wanna see your connection :)

*Sweet Achill3uS!
This is gonna be one hectic weekend

[Mysterfix]

Doe's anybody know what max safe 24/7 voltage is on these cards?

I got mine in yesterday and the volt mod went smoothly but I have no idea what's safe for 24/7 use. I've had the card clocked as high as 900/2000/2000 bench stable but it took 1.4v to do it. I'm currently running it at 875/2000/2000 @ 1.28v, still in the process of testing the shaders and memory though.

[Achill3uS]

Any chance we an get bigger and closer pics?

I wanna see your connection :)

*Sweet Achill3uS!
This is gonna be one hectic weekend

Thx mate :) i edited the pic, will upload better for you! btw tomorrow I will test the card outside with my 6850 under DI, and next week my gpu pot will finished and after the FUN begins :D

[Hazaro]

Thx mate :) i edited the pic, will upload better for you! btw tomorrow I will test the card outside with my 6850 under DI, and next week my gpu pot will finished and after the FUN begins :D

Link/picture not showing to me. Did you just remove it? (Or pm me)

*A DI run... shame you don't have a quad to pump your benches!

[JKDC]

Would anyone post the resistances to get the 1.22v and 1.4v please?

[GAR]

Anyone try the pencil mods????? for the vcore??? i dont wanna be the test dummy LOL

[GAR]

ok, so i tried that pencil mod, and it didnt work, nothing happened.....did both resistors and temps and overclock stayed the same...........

[Mysterfix]

Thanks guys, for not slapping me silly for missing those 3 glaring post about the max voltage applyable to these cards.:rolleyes:

Just in case anybody else missed it 1.4v on the core should be safe but caution is advised.:up:

[Hazaro]

I can confirm that this is working. I tried 1.25 and 1.3 but got the same results. I now set it to 1.2 volts and have the same OC. I imagine this only goes to 1.15 on the card. My OC went from 702/1722 to 756/1836. I set the lowest voltages to 1.1 and the two highest to 1.2. You have to edit the voltages before they show in the table. My temps went up 2C idle and 3C load with a thermalright V2 cooler. With stock cooling you better have the fan speed up to 50%+ before trying this.

It's still not enough to stop the vmod unfortunately but it is free and easier. Make sure you have the latest NBitor (v3.5a) and NVflash (v5.57). Previous versions don't support the 8800GT. Use the thread on extreme bios mod for the 8800GT for switches and floppy DOS image. Remember to back up original BIOS first and have a spare PCI card just in case you need to flash it back.

What is stopping you from putting 1.4V in the BIOS? The chip?

[Renegade5399]

http://www.vr-zone.com/articles/Galaxy_Own_Designed_8800GT_w_3_Phase_Power/5387.html

Any news on how this will volt mod?

[largon]

Renegade5399,
Need pics of the backside of the card.

[GAR]

I tried the bios vmod and nothing doin, this crap card i have is a dud.........at this moment i will try any kind of a mod, my next mod is a real solder vmod.

[sluggo]

Anyone know if all brands use Qimonda mems on all 8800 gt cards? , and i wonder one more things also can a new bios or something remove the big overclocking steps?. The clocks steps are realy to big.

GoldenTiger what psu do you using? and are you trying to clock in sli?
The programmable clock generators used on these boards are capable of thousands of frequency setpoints. The steps that the overclocking tool allows are only those steps allowed to it by the board's BIOS. Modifying the BIOS to permit finer control of the clock generator is not something I know how to do, but the limitation is definitely not the hardware.

[Mysterfix]

Core clock stepping seems to be proportional to the shader clock, meaning if you set your shader clock around 1800 you should get smaller jumps in core clocks. It works tha way on my card (eVGA SC 8800GT), I get some pretty big jumps when the shader is at default value but upping it to beyond 1800mhz makes the core clocks move in smaller increaments.

[F@32]

Has anyone tried to increase vgpu through bios mod. I increased the stock bios' 3D voltage with Nibitor to 1,22v and flashed it back to my card. It appears to be working as I get far more stable core clocks over 700MHz and up to 800MHz. I guess the voltage increase is small (I didn't have the time to measure it with a DMM) but is probably not even close to the set value. When I'll get home I'll measure it so not to speak hypothetically.
Are you 15min AtiTool artifact free at 800MHz? Have you tried DMM measurement to be sure it changes anything? I set my to 1.2v and same clocks as 1.1v. I squeezed extra 25MHz going from 1.05 to 1.1 though...

Regards

[Renegade5399]

Renegade5399,
Need pics of the backside of the card.

As soon as I get my grubby hands on some, they will be posted!

[pinto]

VGPU:1.3v wtercooled:

3DMark Score 17231 3DMarks
SM 2.0 Score 7218 Marks
SM 3.0 Score 6777 Marks
CPU Score 6352 Marks

http://img135.imageshack.us/img135/3316/3d06172318800gt1hw1.jpg (http://imageshack.us)

[4Qman]

VGPU:1.3v wtercooled:

3DMark Score 17231 3DMarks
SM 2.0 Score 7218 Marks
SM 3.0 Score 6777 Marks
CPU Score 6352 Marks


Mate does it scale any more with more GPU voltage?,. Also is the memory voltage stock?

What brand card also :p:

Nice results and thanks for sharing. :up:

[pinto]

OVP protection, i think, above 1.3v (or my card doesn't like more volt)
stock volt on memory but not max out (at least 1070mhz possible but not tested with 860mhz gpu)
My card is a BFG OC
temp wasn't really good 49&#176;c full load (the Q6600 at 1.64v gets really hot)

[Hazaro]

VGPU:1.3v wtercooled:

3DMark Score 17231 3DMarks
SM 2.0 Score 7218 Marks
SM 3.0 Score 6777 Marks
CPU Score 6352 Marks



:clap:

Nice...

[Mysterfix]

OVP protection, i think, above 1.3v (or my card doesn't like more volt)
stock volt on memory but not max out (at least 1070mhz possible but not tested with 860mhz gpu)
My card is a BFG OC
temp wasn't really good 49°c full load (the Q6600 at 1.64v gets really hot)

Yep, you are correct about OVP, 1.3v is the max you can get without it kicking in. Anything above 1.3v and my card will stop responding after a few minutes and mm reading is 0.01v until computer is powered down and restarted.

[dinos22]

hmmm 1.3 that's bad news

[riptor]

Maximum Volt Mod

[dinos22]

just gotta see now whether that OVP point that was pointed out earlier in the modding thread will work....just need to get someone to test this out now

[Mysterfix]

Is it possible to do the OVP mod by penciling the resistor? If so I'd be willing to play guinea pig.

[Hazaro]

Is it possible to do the OVP mod by penciling the resistor? If so I'd be willing to play guinea pig.

Does the OVP play any role in BIOS max voltage?

[dinos22]

i don't think bios can select that much voltage
'
from what people are reporting max 1.2v
so you have to hard mod but if only 1.3v it is not worth it unless you are going to push it on DICE

[metro.cl]

VGPU:1.3v wtercooled:

3DMark Score 17231 3DMarks
SM 2.0 Score 7218 Marks
SM 3.0 Score 6777 Marks
CPU Score 6352 Marks

http://img135.imageshack.us/img135/3316/3d06172318800gt1hw1.jpg (http://imageshack.us)

that is really nice for such a cheap card

[Renegade5399]

Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

http://www.xpcgear.com/be880gtt3.html

Hurry up, they still have stock!

[winbond]

Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

http://www.xpcgear.com/be880gtt3.html

Hurry up, they still have stock!

i was going to get one from them, but they have some really bad reviews at resellerratings.com

..also i read that one guy ordered this card from them and got the regular edition with refference cooler and probably without the 3phase power

[Hazaro]

Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

http://www.xpcgear.com/be880gtt3.html

Hurry up, they still have stock!

It doesn't say phase 3 anywhere on it and the picture even says "Actual item may differ from image shown"

The part number doesn't come up on google, and the reference name is like this one:

http://www.hardwareschotte.de/hardware/preise/proid_9142680/preis_XPERTVISIONPALIT+GeForce+8800GT+NE8800TT352

Their main webpage doesn't list a product or part number either :/

Be wary...


i was going to get one from them, but they have some really bad reviews at resellerratings.com

..also i read that one guy ordered this card from them and got the regular edition with refference cooler and probably without the 3phase power

Not a good sign.

[trans am]

okay doing the mod. now. Freaked out this is my 1st one. What do I do 1st/

I have 1kohm vr ready to go and wire from a fan. multi meter =/ good rosin core 2.5 oz .032 diameter solder. HELP

using this as a guide http://www.xtremesystems.org/forums/attachment.php?attachmentid=66691&stc=1&d=1194114049

[metro.cl]

Ok Mod BIOS and overclock testing again:

This is Max shaders i tried the next step but it is 2000MHz a big jump, not max core yet, vRAM didnt play much but at least it didnt get worst that before the mod.
http://i191.photobucket.com/albums/z25/Metr0/8800GT&#37;20voltmod/vmod792-1944-1035.jpg

[trans am]

Ok Mod BIOS and overclock testing again:

This is Max shaders i tried the next step but it is 2000MHz a big jump, not max core yet, vRAM didnt play much but at least it didnt get worst that before the mod.
http://i191.photobucket.com/albums/z25/Metr0/8800GT&#37;20voltmod/vmod792-1944-1035.jpg

Okay soldiering is done. Now what? do i measure something? plug it in? turn pot? HELP MAN!


okay if I measure on the points I just soldered. (see image) I get 014.1 ohms does this help?

[jason4207]

okay doing the mod. now. Freaked out this is my 1st one. What do I do 1st/

I have 20k vr ready to go and wire from a fan. multi meter =/ good rosin core 2.5 oz .032 diameter solder. HELP

using this as a guide http://www.xtremesystems.org/forums/attachment.php?attachmentid=66691&stc=1&d=1194114049

You're going to need a 500Ohm or 1kOhm VR for the vGPU. Where are you using the 20k?

[jason4207]

Ok Mod BIOS and overclock testing again:

This is Max shaders i tried the next step but it is 2000MHz a big jump, not max core yet, vRAM didnt play much but at least it didnt get worst that before the mod.


I'm confused? :confused: Did you mod the BIOS to get extra volts? Or did you use a VR?

[Mysterfix]

Does the OVP play any role in BIOS max voltage?
I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.:D

It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.:rolleyes:

[Hazaro]

I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.:D

It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.:rolleyes:

How hot is it getting?!

[metro.cl]

Okay soldiering is done. Now what? do i measure something? plug it in? turn pot? HELP MAN!


okay if I measure on the points I just soldered. (see image) I get 014.1 ohms does this help?

If you soldered you need to lower the resistance to get more volts, turn a little and check vGPU with a tester, and then try OC.


I'm confused? :confused: Did you mod the BIOS to get extra volts? Or did you use a VR?

only bios so far

[Mysterfix]

How hot is it getting?!

Not hot at all really, went up 2ºc on the core (40ºc-42ºc)

Mosfets and vregs are in hte mid to upper 40's sinked without a fan and mid to upper 30's with a fan.

[jason4207]

only bios so far

How did you change vRAM?

[metro.cl]

How did you change vRAM?

i didnt there is a pencil mod for that and it is quite easy, but this vRAM doesnt seem to respond good to volts

[jason4207]

i didnt there is a pencil mod for that and it is quite easy, but this vRAM doesnt seem to respond good to volts

Well I am hoping my RAM will fare better w/ a little extra volts. I was only getting 929 stable earlier. Now it seems 951 is stable...gonna try a little higher. I know 972 isn't stable. I don't understand why doing the BIOS mod would affect the maximum RAM clocks, but I'm not complaining. Maybe they just needed to break in?

Yes, I did the BIOS volt mod. I just want to thank you guys for the valuable info, and thanks to Mavke for his hard work!

I was only getting 712/1674/929 (pretty low) stable earlier on my vanilla GT. I actually got a card w/ stock 600/1500/900 clocks despite the fact a lot of folks got SC factory clocks on their vanilla GT's. (got it through eVGA's step-up...320GTS-->GT)

Now I'm getting 741/1728/951 artifact free under ATI Tool...so far. Temps are 70 on the stock cooler w/ 100&#37; fan.

Next step is to get the HR03GT (when it's released), and a good fan on there. Then some VRs will help me get in the 800/2000's...I hope!

edit: I may just leave my RAM alone if it'll run at 950. No use to go higher until I understand better this rumor I hear of the RAM dieing if you OC it to 1000.

[Renegade5399]

I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.:D

It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.:rolleyes:

Which one is the OVP resistor?

[GAR]

so is the bios mod working for you guys????? if so can you share a screen shot of the bios settings....thanks.

[kiwi]

so is the bios mod working for you guys????? if so can you share a screen shot of the bios settings....thanks.

Go to bios section you will find it :) Yes, you can increase voltage by 0.05V from bios and it really works.