GTX285 VGPU and OCP mod

[crotale]

Here is the VGPU mod for nvidia GTX285 to start with, I will update the thread as soon as I have the OCP mod image done.

I will also post some more info from our Tri-SLI benchmarking at CeBIT 2009.

! IMPORTANT INFORMATION !
These mods have been tested, BUT I take no responsibility for how you use
the mods and what happens to the card. Make sure the cooling is sufficient etc.
The soldering order is crucial, make sure it's done exactly as the images show.

Mod overview:
http://www.nordiccrew.com/crotale/vmod/gtx285vgpu.jpg
Image copyright of W1zzard at www.techpowerup.com

This is how it looks when soldered to the card.
http://www.nordiccrew.com/crotale/vmod/gtx285vgpu2.jpg

We ran 1.4V+ and no sign of OVP.

OCP will trig at some point and here is the mod for that:

http://www.nordiccrew.com/crotale/vmod/gtx285ocp1.jpg
Image copyright of W1zzard at www.techpowerup.com

Please post at what frequencies it triggers for you with what type of cooling.

[Orangeblast]

wow, who's going to be the first to try this out?

[trueg50]

wow, who's going to be the first to try this out?

I will probably be doing this mod for a friends 285 if the results are good from Crotale.

If he really can do 900 mhz on the core, I may have to do this on my card too.

[8800's@over]

Pencil Mod ??

[crotale]

I think 900 core would be a stretch with air or water. With LN2 it's another story. We were doing some quick single card tests at 1100/2200+ core/shader with around 1.4V, so the achitecture is capable of it.

[crotale]

Pencil Mod ??

Please have a look at this thread for some pencil mods:

http://www.xtremesystems.org/forums/showthread.php?t=215224

[Gautam]

Is this some sort of voltage divider?

Also nice Vantage scores :up: What kinda clocks were you guys running for those?

[crotale]

Is this some sort of voltage divider?

Also nice Vantage scores :up: What kinda clocks were you guys running for those?

Exactly. I guess the 0 ohm resistor is there to simplify routing. Lucky for us :)

Around 1000/2000/1400 core/shader/mem.

[hipro5]

Around 1000/2000/1400 core/shader/mem.

Thanks crotale........ :) :up:

I didn't have much time to start seaking for the mods (except the OCP triggering) and you've helped me with the VCore mod...... :)

1026/2267/1404 with 1.4VCore.....1.44V for 1058 core and 1.5V for over that at -102*C
I haven't done the Vdimm mod yet.... :D

[crotale]

Thanks crotale........ :) :up:

I didn't have much time to start seaking for the mods (except the OCP triggering) and you've helped me with the VCore mod...... :)

1026/2267/1404 with 1.4VCore.....1.44V for 1058 core and 1.5V for over that at -102*C
I haven't done the Vdimm mod yet.... :D

Nice runs :up:

The shader was slightly more stubborn on the card we tried.
1120/2200 has worked, but we had to lower the memory for those speeds.

vmem rises slightly with vgpu and at some point we need to lower the mem clocks. :rolleyes:

*Updated the first thread with OCP*

[BenchZowner]

Have you seen George's mem clocks ?
He's done GDDR3-1500 @ 3D Mark2001SE ( and without any Vmods for the memory like he said ) jeez.
I tested a GTX 285 yesterday on LN2, and only managed to get it up to 1040/2106 ( GPU/SPs ) at -105C approx. :(
About 1.45Vgpu

[NapalmV5]

thanks for sharing the mods crotale :toast:

vmem mod: http://www.xtremesystems.org/Forums/showpost.php?p=3617311&postcount=39

[CryptiK]

Thanks for posting the mod crotale, excellent work.


Have you seen George's mem clocks ?
He's done GDDR3-1500 @ 3D Mark2001SE ( and without any Vmods for the memory like he said ) jeez.
I tested a GTX 285 yesterday on LN2, and only managed to get it up to 1040/2106 ( GPU/SPs ) at -105C approx. :(
About 1.45Vgpu

Some of these cards can hit 1500+ mem easily. Mine has no issues at those mem speeds, others seem to struggle or artifact though.

http://i720.photobucket.com/albums/ww206/CryptiKone/aqm45ghz278181.jpg

[crotale]

Please report voltages, frequencies and cooling so we get some references.

[hipro5]

Don't look at the low score....It's because by old trusty PATA HD has failed during benching and I used a SATA one with only 120MHz PCI-E or the score whould have been 91k++ ... :(

GPU = 1.41Volts
Rams = default Voltage (I did't have the time nor the willing to mod it)
-102*C

http://www.hipro-tech.com/images/hipro5/1_ASUS_Rampage_Extreme/2k1_4000MHz_SINGLE_90553.png

[hehee]

need help...
vgpu moded@1.35 solid color screen hang on DIRT even on default clock.ATItool 10mins OK
if turn down to 1.22v everything fine.
on water temp not an issue around 45-50 C only.
would OCP help this ..?
wat value to turn OCP vr ? how to indicate ?
if over turned will fry my card .?

[crotale]

need help...
vgpu moded@1.35 solid color screen hang on DIRT even on default clock.ATItool 10mins OK
if turn down to 1.22v everything fine.
on water temp not an issue around 45-50 C only.
would OCP help this ..?
wat value to turn OCP vr ? how to indicate ?
if over turned will fry my card .?
Solid color can be OCP.
Try just soldering in a 100k VR as the OCP mod describes and see if it helps.

[hehee]

Solid color can be OCP.
Try just soldering in a 100k VR as the OCP mod describes and see if it helps.

ya it's OCP .
after added OCP mod no more solid hang screen.
only 1.4vgpu ,check temp at the back of card power phase area lotsa heat.bout 85c on FURmark
reduce to 1.35 for 24/7.
thkz man you're great.

[Brian y.]

Thank you for sharing your mod crotale:clap::clap:

[trueg50]

ya it's OCP .
after added OCP mod no more solid hang screen.
only 1.4vgpu ,check temp at the back of card power phase area lotsa heat.bout 85c on FURmark
reduce to 1.35 for 24/7.
thkz man you're great.

What sort of clocks have you been able to get with the mod?

How is the card cooled?

[BenchZowner]

Thanks for posting the mod crotale, excellent work.



Some of these cards can hit 1500+ mem easily. Mine has no issues at those mem speeds, others seem to struggle or artifact though.

http://i720.photobucket.com/albums/ww206/CryptiKone/aqm45ghz278181.jpg

Well, then I guess it's my bad luck once again.
2 out 2 cards failed to hit anything higher than 1378 without artifacting, and would crash nearly instantly at anything over 1400.

[Yellowbeard]

I assume this is the mod done on those 3 awesome 285s you had at CEBIT?

[NapalmV5]

well believe it or not i had to ocp mod my unmodded 285 ftw/stock cooling

again thanks for the ocp mod crotale

air/even water cooling ocp mod is a must


edit: if you guys want higher mem.. ocp mod will take care of that too

ive gained 100mhz mem @ heavy load

you want lower temps? ocp mod will do that too


edit2: ive never been able to clock my ftw @ 1512 which would cause blank/black screens

here i am @ 1548 mem clock @ heavy load thanks to the ocp mod

overall 150+mhz mem gain @ heavy load @ stock air cooler

once again thanks crotale for the mod :toast:

[crotale]

I assume this is the mod done on those 3 awesome 285s you had at CEBIT?
Hey Mike, yes they were :)

Speaking of which, thanks for your support. The Dominators and the HX1000 served us well :up:

[hehee]

What sort of clocks have you been able to get with the mod?

How is the card cooled?

so far
vgpu =-1.35v
core 795/shader 1700/mem1450
mcw 60 and ram sink

[KingK76]

so far
vgpu =-1.35v
core 795/shader 1700/mem1450
mcw 60 and ram sink

I'm hitting those clocks (792core, 1692shader, 1485mem) with the stock SSC volts (1.22v). I also have the MCW-60 blocks on my cards (SLI). I will try these new mods in the next week or so and let you guys know if I can it push further! As it is now both cards idle @ 30c and under heavy load max out @ 40c.

[Sn@ke:~]

Hey guys I just can't hold my self to ask you guys what sort of gain in FPS you are getting with Vmod? Is it really worth it? Or is it only for benching?

If you could just bench in FPS for one or two game at stock clock and then at overclock mod that would be really nice to give an idea to see if it is worth it or not.

[hehee]

Hey guys I just can't hold my self to ask you guys what sort of gain in FPS you are getting with Vmod? Is it really worth it? Or is it only for benching?

If you could just bench in FPS for one or two game at stock clock and then at overclock mod that would be really nice to give an idea to see if it is worth it or not.

for personal reason.... i just like to make my $$$ worth more than i spend...

[trueg50]

Hey guys I just can't hold my self to ask you guys what sort of gain in FPS you are getting with Vmod? Is it really worth it? Or is it only for benching?

If you could just bench in FPS for one or two game at stock clock and then at overclock mod that would be really nice to give an idea to see if it is worth it or not.


for personal reason.... i just like to make my $$$ worth more than i spend...

Not to mention that it honestly is like crack, you just can't stop volt modding your cards.

I don't know if it is the joy of working with small solder points, or the wonderful aroma of lead solder, but I find it very fun and relaxing.

[Sn@ke:~]

Not to mention that it honestly is like crack, you just can't stop volt modding your cards.

I don't know if it is the joy of working with small solder points, or the wonderful aroma of lead solder, but I find it very fun and relaxing.

I see and I understand, but Could you still make a FPS benchmark on one or two game just to see how many FPS can be squeeze out of a Vmod.

It is kind of sad to see people benching with all sort of benchmark but still never bench with the number one main reason why people buy new card " they want more FPS in game"

[trueg50]

I see and I understand, but Could you still make a FPS benchmark on one or two game just to see how many FPS can be squeeze out of a Vmod.

It is kind of sad to see people benching with all sort of benchmark but still never bench with the number one main reason why people buy new card " they want more FPS in game"

I know what you mean.

Very tough to find info for volt modded cards. What I do is basically look on review sites and see how much of a difference their overclock makes, and you can sort of guess if the volt mod will yield good results.

[Dr.No.pt]

This OCP mod doesn't work in a GTX295, right ? :rolleyes:

:up:

[crotale]

This OCP mod doesn't work in a GTX295, right ? :rolleyes:

:up:

No, completely different vreg.

[ChinStrap]

This OCP mod doesn't work in a GTX295, right ? :rolleyes:

:up:

http://www.xtremesystems.org/forums/showthread.php?t=215521

295 vmod thread :)

[bahlgren342]

Do vmods void being able to step up with Evga?

My guess is yes.

[Dr.No.pt]

http://www.xtremesystems.org/forums/showthread.php?t=215521

295 vmod thread :)

Thanks ChinStrap but what i really need is OCP mod.
My problem is OCP that is kicking in @ 1,2v.
I'm "only" reaching 755 mhz with 1,1875v.

It's great that this OCP is working for GTX285 users. Hope someone find the same for GTX295.

:up:

P.S. Sorry for this Offtopic post.

[inzer890]

Hey guys I just can't hold my self to ask you guys what sort of gain in FPS you are getting with Vmod? Is it really worth it? Or is it only for benching?

If you could just bench in FPS for one or two game at stock clock and then at overclock mod that would be really nice to give an idea to see if it is worth it or not.

it's so easy to find plenty of reviews on the net, where the results of OC'd card vs stock clocks are presented. The main meaning of VMods - is to push the limit of stable clocks higher, in comparison with nominal voltage. And after that, You can make your own investigation:do those new framerates worth VMods, or it's better to leave stock? :ROTF:

[10acjed]

Do vmods void being able to step up with Evga?

My guess is yes.

Yeah, Im pretty sure it would be difficult to hide the fact that you soldered wires to your gpu..

the soft mods in the other thread are removable though.....

[bahlgren342]

Well you can always de-solder and use a solder sucker. But it would still probably be hard to hide completely.

No softmod for gtx 285.

[dengyong]

I haven't gained anything from the mods other than the bridges and caps. (stopped at 1.3v core)
My card will clock much higher with the mods, but benchmark scores go way down from my every day clock without the mods (774/1728/1512 actual).
3dmark06 score dropped from 24,000 to a little over 21,000 with anything more than my regular core/shader settings .
I'm not complaining and I thank NapalmV5,cryptic and crotale for sharing their work.
I'm going to tune my vr's back to stock volts and be happy with what I have.
96498

[KingK76]

Here is the VGPU mod for nvidia GTX285 to start with, I will update the thread as soon as I have the OCP mod image done.

I will also post some more info from our Tri-SLI benchmarking at CeBIT 2009.

! IMPORTANT INFORMATION !
These mods have been tested, BUT I take no responsibility for how you use
the mods and what happens to the card. Make sure the cooling is sufficient etc.
The soldering order is crucial, make sure it's done exactly as the images show.

Mod overview:
http://www.nordiccrew.com/crotale/vmod/gtx285vgpu.jpg
Image copyright of W1zzard at www.techpowerup.com



This is how it looks when soldered to the card.
http://www.nordiccrew.com/crotale/vmod/gtx285vgpu2.jpg

We ran 1.4V+ and no sign of OVP.

OCP will trig at some point and here is the mod for that:

http://www.nordiccrew.com/crotale/vmod/gtx285ocp1.jpg
Image copyright of W1zzard at www.techpowerup.com

Please post at what frequencies it triggers for you with what type of cooling.

I have a question about the vGPU mod. I know leg 1 and 2 must be soldered to the proper pads where the SMR was. But my question is for leg three. Do you have to solder to the spot shown or can you use any proper ground. You have it labeled as ground so I hope I can just use any proper ground because when I attempted the spot you pictured the wire kind of flipped up before I could secure it and it took off about half of the end I had it soldered to. I took readings before the screw up and it still shows the same reading it's just very difficult to attach the wire there now, not to mention I'm a little gun shy of using that SMD because it took VERY little pressure to pop half the tinned end off. My card is an XFX Black Edition and everything else seems to be of high quality, but even before I attempted that spot I had a bad feeling about the way that SMD looked. It just looked bad to begin with. Anyway I hope somebody can answer this question... It would be greatly appreciated!

Sorry to add this in but I guess I should ask before attempting step 2. The OCP mod. Is leg 3 on that also just a ground or does it have to be soldered to that specific point.

Thanks!

[crotale]

I have a question about the vGPU mod. I know leg 1 and 2 must be soldered to the proper pads where the SMR was. But my question is for leg three. Do you have to solder to the spot shown or can you use any proper ground. You have it labeled as ground so I hope I can just use any proper ground because when I attempted the spot you pictured the wire kind of flipped up before I could secure it and it took off about half of the end I had it soldered to. I took readings before the screw up and it still shows the same reading it's just very difficult to attach the wire there now, not to mention I'm a little gun shy of using that SMD because it took VERY little pressure to pop half the tinned end off. My card is an XFX Black Edition and everything else seems to be of high quality, but even before I attempted that spot I had a bad feeling about the way that SMD looked. It just looked bad to begin with. Anyway I hope somebody can answer this question... It would be greatly appreciated!

Sorry to add this in but I guess I should ask before attempting step 2. The OCP mod. Is leg 3 on that also just a ground or does it have to be soldered to that specific point.

Thanks!

Yes, leg 3 in both cases are ground.

[KingK76]

Yes, leg 3 in both cases are ground.

Thanks for that! What a relief! I was worried I wouldn't be able to do the mod.
I'll let everyone know how it goes once I'm done. It will be on the weekend.:up:

[EL RICHARDO]

I'm getting GOOD results with the vGPU mod... Thank's crotale!!! :) 1 (maybe silly) question... If later on i want to sell my card do i need to solder again the resistor from the vGPU mod?

[crotale]

I'm getting GOOD results with the vGPU mod... Thank's crotale!!! :) 1 (maybe silly) question... If later on i want to sell my card do i need to solder again the resistor from the vGPU mod?

Either that, or any other zero ohm SMD resistor, or just a blob of solder between the two pads.

[EL RICHARDO]

Either that, or any other zero ohm SMD resistor, or just a blob of solder between the two pads.Thanks! ;) I am also having GREAT results from the OCP mod! :) In 3DMark 06 with my current clocks 756c/1692s/1404m i was getting instant black screens... Now they are GONE! :clap: Thanks again!

[Sebastione]

Hello, my PNY card is currently under water doing 760/1700 24/7 stable on 1,13 V :)
Given that max stable on air was about 720/1555 I find this a nice increase.

I´m interested in doing the Vmod now. Which voltages will be usable 24/7 for gaming without frying the chip? Someone said under 1,5 Volt but isnt around 1,4V on water still too much for a chip that comes at 1,13 V? Any suggestions ?

Thanks Sebastione

[EL RICHARDO]

In OCP mod when the 100K VR is soldered it measures between leg 2 and 3 with max resistance 21.3K ohms... Is this right?

[Hazzan]

very nice indeed guide tutorial VMOD on GTX 285...:):)

[trueg50]

For the vGPU mod; I was going to use a slightly different VR; would the numbering (and corresponding connections) be the same with this model ?

https://www.egr.msu.edu/eceshop/Parts_Inventory/images/100%20Ohm%20Square%20Precision%20Multiturn%20Poten tiometer.jpg

When ever the heck my card comes in (I won it in the Bjorn3D folding contest back at the beginning of March, and am still waiting on it) I am definitely doing the OCP and vGPU mod, as well as possibly removing the IHS. I will certainly post results once I mod it.

[babalouj]

For the vGPU mod; I was going to use a slightly different VR; would the numbering (and corresponding connections) be the same with this model ?


Yes, it is the same numbering. 2 being the wiper.

[trueg50]

Yes, it is the same numbering. 2 being the wiper.

Thank you very much sir.

[G4h4o8s6T]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs :p:

[trueg50]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs :p:

Any luck with this G4h4o8s6T? You should set the VR to 100k ohm then solder it down. After you solder both legs, you then proceed to tune it to maybe 15k; I think it is just measured between both legs.

I am so close to breaking the 200gb/s memory bandwidth mark, I am just dying to get the mod done and get the extra 50 mhz (ish) to break the mark.

[crotale]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs :p:

That sounds correct.

Without the VR soldered in, it has a specific resistance and the feedback circuitry has another resistance (~20-25k). When the VR is soldered in and you are measuring the resistance over the two legs the reading is the parallell resistance between the VR and the onboard resistance.

What actual resistance the VR has is not important.

[ibm390s]

just received two EVGA FTW cards few days ago and i started to tweak them. First of all installed a waterblock one one card and left the stock air cooling on the second. with this config i was able to clock both of the cards at 735MHz/1445MHz. after that i removed the air cooled card and left only the watercooled card which was able to hi 770MHz/1480MHz. Today i'll mount the second waterblock on the second card and hope that the second card will be able to keep up the clocks. In the mean time i ordered some VR's but here in romania is a PITA to obtain good electronic parts.

http://i39.tinypic.com/wbpd2e.jpg

http://i39.tinypic.com/14lu0x5.jpg

I hope to achieve 790-800MHz on the gpu's and 1500 for the memory with voltmods and watercooling on each card.

[NapalmV5]

crotale - ocp/vgpu mod for the 2gb 285 ?

[crotale]

crotale - ocp/vgpu mod for the 2gb 285 ?
What IC does it sport?

[NapalmV5]

i have no idea lol didnt check under the hood yet

i can say the pwm is better than that of 1gb 285 just going by loads

let me search a bit..

[Mayk-Freak]

crotale - ocp/vgpu mod for the 2gb 285 ?

Yes I also interested in.

[crio]

Post a pic of the card.The front and back of the naked car will do to trick...

[Mayk-Freak]

I don´t have the card yet, I will buy this card in the next week.

[Sebastione]

Okay i have totally fxxxx up this mod and my card wont post :(
I have blown both resistors that show number 3 in both pictures.
The resistor between 1 and 2 is also missing but someone said you could just use a blob of iron instead....
Would someone with good soldering skills get my card back to life and do the OCP/Vmod/Vmem Mod as well? I am offering a Aquagraphx GTX285 block (still sitting on the card ;) ) or if you prefer a Corsair HX520.I am located in Germany though....

[Mayk-Freak]

My MSI 285GTX OC-SuperPipe 2GB



http://www.abload.de/thumb/imag0163ff35.jpg (http://www.abload.de/image.php?img=imag0163ff35.jpg)

http://www.abload.de/thumb/imag0168zcth.jpg (http://www.abload.de/image.php?img=imag0168zcth.jpg)

[S_A_V]

My MSI 285GTX OC-SuperPipe 2GB

Here you can find Vgpu/OCP/Vmem for this card:
http://phpbb3.ocmag.eu/viewtopic.php?f=155&t=147

[Mayk-Freak]

I thank you very much. But can you explain it a bit simplier and perhaps more objectiv? Which results can you get with this mode? Does it works?

[chispy]

Guys i got the same PCb as the 2GB model but instead its a 1GB model , eVGA vanilla new revision PCB v1.1. It looks exactly the same as Mayk-Freak pictures. I went thru the mod that SAV posted(Tx a lot SAV) (used google translate of course :)) and im ready for the mod but the lowest VR that i can get on the island of Puerto Rico where i live its a 1K ohm :( , it is required a 100 to 300 ohms VR , it will be too risky to dial the voltage with such 1K ohms VR its a 15turn cermet ?

If pictures are needed let me know as my card is naked right now :D.

[Mayk-Freak]

Guys i got the same PCb as the 2GB model but instead its a 1GB model , eVGA vanilla new revision PCB v1.1. It looks exactly the same as Mayk-Freak pictures. I went thru the mod that SAV posted(Tx a lot SAV) (used google translate of course :)) and im ready for the mod but the lowest VR that i can get on the island of Puerto Rico where i live its a 1K ohm :( , it is required a 100 to 300 ohms VR , it will be too risky to dial the voltage with such 1K ohms VR its a 15turn cermet ?

If pictures are needed let me know as my card is naked right now :D.

When you wish I could sent you some VRs? You only should give me your adress.

[TiN_]

chispy

You can use 1k VR, just add 100-200 ohm normal fixed resistor serial. Like this:

VR solder point <<<< Fixed 200ohm resistor <<< VR center dial pin

You will get protection from shortcurcuit on VR, if you get to the end in benching action :D.

[chispy]

chispy

You can use 1k VR, just add 100-200 ohm normal fixed resistor serial. Like this:

VR solder point <<<< Fixed 200ohm resistor <<< VR center dial pin

You will get protection from shortcurcuit on VR, if you get to the end in benching action :D.

Wow , Tx a lot glad to hear theres an easy fixed :up: yes i can get those fixed 200ohm resistors at my local radio shack :) , will post results here and pics after the v.mod its done and tested.


@ Mayk-Freak , Thanks a lot very kind of you bro , appreciated much. I think i got it fixed. If it does not work maybe i will bother you for one :up: , Thanks a million for you good intentions you are a good man.



Chispy.

[Mayk-Freak]

Wow , Tx a lot glad to hear theres an easy fixed :up: yes i can get those fixed 200ohm resistors at my local radio shack :) , will post results here and pics after the v.mod its done and tested.


@ Mayk-Freak , Thanks a lot very kind of you bro , appreciated much. I think i got it fixed. If it does not work maybe i will bother you for one :up: , Thanks a million for you good intentions you are a good man.



Chispy.

If your mod works, can you please put in some photos of the mod, that I can see it better.

[chispy]

Sure bro , im done with the mod , i need someone to guide me to the read out point for the V.Core.

This is my Revision 1.1 eVGA GTX 285 vanilla card with new PCB th same as the 2GB PCB. Can someone help me out finding the read out point for the V.Core GPU Please :) , thank you. Volt Mod its done but i need the V.core read out point for verification before i test the card.






Front of the card with volt mod done already , ready to test. but i need v.core read point.
--------------------------------------------------------------------------------------





http://img140.imageshack.us/img140/8118/picture020p.jpg
By chispy (http://profile.imageshack.us/user/chispy), shot with FinePix A340 (http://profile.imageshack.us/camerabuy.php?model=FinePix+A340&make=FUJIFILM) at 2009-07-28

[Mayk-Freak]

perhaps here?

http://www.abload.de/img/redpunktmhuv.png (http://www.abload.de/image.php?img=redpunktmhuv.png)

[chispy]

Mayk-Freak i wont be home for a few days , i will test when i get home from taking my son to a boyscout Jamboree :D


chispy.

[Mayk-Freak]

I´ve done the GPU Volt Mod, results with 1,26 V watercooled.


3DMark 06 MSI 285 GTX 2 GB 781/1751/1320MHz
http://www.abload.de/thumb/reckord2u6so.png (http://www.abload.de/image.php?img=reckord2u6so.png)

Vantage Physik on
http://www.abload.de/thumb/modundpysik05ph.png (http://www.abload.de/image.php?img=modundpysik05ph.png)

Vantage Physik off

http://www.abload.de/thumb/modohnepysikv2cj.png (http://www.abload.de/image.php?img=modohnepysikv2cj.png)

[chispy]

[QUOTE=Mayk-Freak;3937528]I´ve done the GPU Volt Mod, results with 1,26 V watercooled.

Great to hear that it worked for you bro :) , i just came back from a boyscout jamboree i was with my little son , so now i have some spare time to test this volt mod , did you find the v.core meassuring points ?
Where exactly are you meassuring voltages for V.core bro ? Thanks in advanced.


chispy.

[Mayk-Freak]

my bro...look at the white arrow, there was my meassuring point from the gpu voltage...my new result is 1,29 V...the dimm-mod I haven´t done yet

http://www.abload.de/thumb/imag0165dxb1.jpg (http://www.abload.de/image.php?img=imag0165dxb1.jpg)

[chispy]

my bro...look at the white arrow, there was my meassuring point from the gpu voltage...my new result is 1,29 V...the dimm-mod I haven´t done yet

http://www.abload.de/thumb/imag0165dxb1.jpg (http://www.abload.de/image.php?img=imag0165dxb1.jpg)

Thanks m8 , i was poking around with my DMM on the card with power on and it short it :( , i know the mod works :up: , wednesday my new card will be here and i will try again :).


chispy.

[KingK76]

Hey guys I had to RMA my XFX card and in return I got one of these new PCB 1.1 models. After throwing a man style hissy fit I checked back here to see if there is a Vmod for this card (as I already have a EVGA SSC volt modded and waiting for it's brother to re-join it in Vmodded SLI bliss). Anyway I have looked over the last couple of posts but feel the directions for the mod are a little confusing. Look I was easily able to perform the last Vgpu and OCP mod but I have no formal skill or schooling for this type of thing and am having trouble following the directions (it doesn't help that they aren't in english). Anyway could someone please help me out as I really feel like crap now that I will either have to un-mod may other card or sell this one. I don't want to do either of those. BTW am I correct in that to perform this mod you have to solder to the tiny leg of the voltage chip?! :shocked:

[KingK76]

Okay I may have gotten a little overwhelmed by one of the photos on the link to the vMod. I just took a look at Chispy's vMod and it seems that you solder the middle leg of a 100ohm VR to the 19th leg of the ISL6327 chip and the other leg of the VR to ground and then I would imagine have it turned up to 100ohm and then go down to raise vGPU. Is this correct? If so I will attempt this on the weekend when I have the time to perform such an operation (I have never soldered to anything that small before!:eek:). Anyway please let me know if this is correct and I can go ahead and let you guys know how it turned out. Thanks!

Oh and another quick question. Is there an issue with OCP or OVP kicking in here? Or does this mod not run into that issue? I'm looking to run about 1.3 to 1.35v.

[RSDXzec]

yeah im also trying to figure out how to do the mod on a rev 1.1 285. could anyone help out in my thread please?

Cheers

[chispy]

Guys the Mod works , just follow the pics at that website , use google translator and you will be fine :). Its very very hard to solder that tiny pin # 19 just take your time and be careful , i have killed a card already trying this mod ok , beware of the risks involved ;).


Chispy.

[RSDXzec]

Guys the Mod works , just follow the pics at that website , use google translator and you will be fine :). Its very very hard to solder that tiny pin # 19 just take your time and be careful , i have killed a card already trying this mod ok , beware of the risks involved ;).


Chispy.

thats why im trying to be really careful with this. Would you be able to answer some of the questions in my thread? and help with the procedure of the vmod? Google translate doesnt clarify much. any help in my thread would be greatly appreciated.

Cheers

[KingK76]

Okay I successfully performed the mod and I am able to increase the voltage to the GPU but I seem to be running into the dreaded OCP issues with the 1.0 PCB revision (solid green or purple screen) at anything over 1.29-1.30v. Now I know the instructions mentioned that OVP or OCP was not an issue but it seems it is for me. Looking at the picture with the wires going everywhere (the shot that initially intimidated me) it seems he does have a OCP mod done with a 100kohm variable resistor. Now I am having trouble seeing the proper solder point there and would like to know at what setting should the vresistor be set at. Any help on this one would be awesome as my version 1.0 PCB 285 is able to hit 828core and 1836shader and I would like to be able to run both of these cards at the same clocks. And so you know the 1.1 card actually runs cooler by about 3 or 4 degrees celsius then the rev 1.0 card at equal volts so it shouldn't be temperature messing things up. Thanks.

[Mayk-Freak]

My GPU Mod MSI 285GTX 2GB sorry for the bad pictures thy were made with the handy.


http://www.abload.de/thumb/voltmod16nr4.png (http://www.abload.de/image.php?img=voltmod16nr4.png)

http://www.abload.de/thumb/voltmod22moo.png (http://www.abload.de/image.php?img=voltmod22moo.png)0

http://www.abload.de/thumb/voltmodan06.png (http://www.abload.de/image.php?img=voltmodan06.png)

[EL RICHARDO]

I have now a Asus 285 TOP with the uP6208AM / VGK939 voltage controller like the one on this page: http://www.syndrome-oc.net/articles.php?article=178&page=4&lang=en I know that pin 9 is the one to use. Anybody has a clue what pot value should I use? Many thank's.

[NapalmV5]

285 1gb/2gb ver1.1 OCP mod :toast:

dont thank me.. thanks goes to crotale for the ver1.0 ocp mod :up:

pic by chispy :up:

http://i47.tinypic.com/jg40pd.jpg

i used a 1k resistor and gained a boat load of clocks @ stock/air cooling on the 2gb evga ftw

good luck!!


ill post results shortly

[NapalmV5]

ocp mod results

ocp: only mod
vgpu: default
vmem: default
cooling: stock/air

clocks gained from ocp mod
core: 18mhz
shader: 36mhz
memory: 162mhz

the 1250mhz mem is actually 1242mhz

http://i29.tinypic.com/15wfdie.png

if i got time today ill try vgpu mod

[chispy]

Thanks for sharing napalm:up:

chispy

[Sebastione]

Hi ,
is anybody willing and able to perform the OCP/VGPU mod on the 2GB model against payment? I figured that i simply cant do it ....

[Sebastione]

The OCP Mod:
Does it have to be that tiny resistor or can i use another ground?

[CryptiK]

You can use whatever ground point you want technically.

[NapalmV5]

if you do the ocp mod.. decide to remove it.. and may remove more than need be removed.. your 285 doesnt boot

heres the fix

connect whatever is left of the ocp point to the resistor in the blue encircled area
http://i46.tinypic.com/2uzqaae.jpg

[Hazzan]

working perfect...thanks all especialy @Crotale :up::up:

http://img193.imageshack.us/img193/4484/img0659wx.jpg

http://img42.imageshack.us/img42/1528/img0664j.jpg

[Brama]

if you do the ocp mod.. decide to remove it.. and may remove more than need be removed.. your 285 doesnt boot

heres the fix

connect whatever is left of the ocp point to the resistor in the blue encircled area
http://i46.tinypic.com/2uzqaae.jpg

Is the connection 3 on SMD component a ground? If yes, I suppose I could connect a simple resistor of 15 K between point 2 and any ground nearby.

Do you agree?

[Turrican]

a buddy mine a question about this mod:)



hello, i got some questions concerning the ocp-mod.
which resistor values are measured between the marked points without mod?
I measured about 26.1 kohm at my BFG OC.

after mod, which resistor value is recommended for stock/air cooling?

[@Starsky]

hello, I am Turrican´s quoted buddy.
additional, I did step 1 (pencil mod) successfully, the card does quite fine (max. : 750/1700/1512). but after longer period of gaming at that clocks card is throttling or I get bsod, so ocp-mod maybe could help?

[CL3P20]

...the GTX275 I mod'd recently showed solid gains from adding input caps on the power phases...it appears as if the OCP mod is helping with excess ripple "tolerance" that is common when you have insufficient capacitance in the circuit. Would be nice to see some results on adding 4x input caps to these 285's... if someone would be willing to test. I used 16v 1800uf caps btw..GPU was running small bump in voltage at 1.25v, 756c/1625s on stock cooler.

Thanks @ the OP ..mods are always appreciated :up:

[CryptiK]

I have modded my 285 with 4 x 220uf Tantalum caps but on the phase outputs, and gained 36MHz core at the same voltage.

Napalm experimented with larger electrolytics on the input side with reported gains also.

[@Starsky]

I soldered ocp mod like shown, resistor values were ok but the mod doesn´t work and furthermore the display shows only black. :(
system starts, card fan is blowing, the card´s status led shows green and the system boots normal into os (I can hear the windows 7 jingle).

any ideas what could have gone wrong? :shrug:

tia

[CL3P20]

Sounds like you activated OCP instead of disabling it ... you sure resistance levels are appropriate..?

[KingK76]

NapalmV5 that is great news! Listen what VR should I use and how should I tune it? Also should I just use a fixed 1Kohm resistor? Please let me know as I have been waiting months for this mod!!!:up:



285 1gb/2gb ver1.1 OCP mod :toast:

dont thank me.. thanks goes to crotale for the ver1.0 ocp mod :up:

pic by chispy :up:

http://i47.tinypic.com/jg40pd.jpg

i used a 1k resistor and gained a boat load of clocks @ stock/air cooling on the 2gb evga ftw

good luck!!


ill post results shortly

[CryptiK]

This mod's been out for months what were you waiting for hehe. A fixed 1K resistor can work, but you'd be better off using a VR, so you can tune it for your needs.

[KingK76]

This mod's been out for months what were you waiting for hehe. A fixed 1K resistor can work, but you'd be better off using a VR, so you can tune it for your needs.

You know what? I kind of gave up on it. I stopped checking in around December and just figured on looking into it again. Thanks for the info. I just was curious about how far would you generally tune it down when running about 1.3v. And while your here, does this mod work with the vmod for the ISL6327 where you connect at pin 19 with 100ohm VR? You see that mod has already been done but I have never been able to get any benefit from it even though my multimeter shows voltage increase. I always figured it was an OCP issue. Is there any other mods supposed to coincide with the v1.1 PCB ISL6327 pin 19 vmod? :shrug:

[CryptiK]

Just vmod and OCP mod that I've seen, no real need for a memory mod as there's minimal gains anyway. Vmods and OCP (sometimes OVP mods) work together, one raises the voltage and the other moves the over current trip point up and out of the way allowing the use of the higher voltage. Occasionally the only mod needed is the vgpu mod, depends on the VRM architecture and design limits. Both mods should let you OC higher with this particular card.

[subaruwrc]

somebody knows a bridge method pencil vmod for new design pcb posted in 102# ?

[aussie-revhead]

I just bought a 285 for some retro benching so Im going to try these mods , fingers crossed.

[aussie-revhead]

Can anyone show me the mod points for a Gigabyte GV-N285-1GH-B ? What clocks can I expect on water with vmod?

http://img12.imageshack.us/img12/2605/gtx2851.jpg (http://imageshack.us/photo/my-images/12/gtx2851.jpg/)


:)