What he said. :) I'm particularly interested in the pic with the purple, red and yellow marks showing where to do the volt mod.Quote:
Originally Posted by marauder16
Thanks for the help.
Printable View
What he said. :) I'm particularly interested in the pic with the purple, red and yellow marks showing where to do the volt mod.Quote:
Originally Posted by marauder16
Thanks for the help.
It is not page 1 but page 22.Quote:
Originally Posted by marauder16
For some reason, someone at Extreme is erasing pictures like hell.
They probably need the occupied space, but it forces me to send and resend pictures again and again, which is not exactly my favorite hobby.
Maybe someone has a website where the pictures can be stored, then all we need is a link in the text.
Attachment 49303
Attachment 49304
Quote:
Originally Posted by t024484
Ok,thanks i sinked all 3 of em anyway
Thanks for reposting them! :toast:
How about using Image Shack?Quote:
Originally Posted by t024484
The idea of using Image Shack is not bad, but when trying to use it, I get tons of warnings that Trojan Horses and Backdoor infections are trying to get in my system. Not very motivating.Quote:
Originally Posted by InTheFlow
Thank's t024484, I tried lowering my core down to 600MHz and saw no improvement. Does anyone know what the optimal voltage is for the majority of these cards? Could 2.1v be the sweet spot? Or with the Samsungs is it a fairly direct deal, more volts, higher clocks. I ask because with my 7800GT the Infineons were good up to 2.5v but performed the best at around 2.2v. Either way I'm going to put some pot's on these cards and find the sweet spot myself, but I though I'd ask anyways. Thanks again.\
Edit: I never knew that letting artifacts occur for too long could damage anything, thanks for that advice. In the past I'd overclock and see a few artifacts, but was too lazy to close my game to downclock. Good thing I haven't been lazy with these cards! Cheers!
Any reader in Australia may like to know that MSY Technology Clayton branch are advertising the 256Mb MSI 7900 GT for $345 AUD. I don't know why so cheap, but I can't see that good a price anywhere else in Australia. :toast: :clap: :banana:
Quote:
Originally Posted by t024484
On my card if my core is at stock (450) or 650 my mem is stuck at 810 MAX overclock ( no vmods ) so i run it at 800mhz everyday.
Planning to do a vmod soon, can the resistance be taken on those shaded resistors even if theres no power flowing on the card?
http://xs304.xs.to/xs304/06323/resistors.jpg
the red shaded parts are the ones to be connected right ?
The resistance can ONLY be taken when the power is not connected.Quote:
Originally Posted by Demo
The red connection is O.K.
Be aware that this is a 1 Kohm resistor, but it is standing in parallel to 1.5 Kohm, giving you 600 Ohm.
If you want to go to 2.1 Volt, the 1 Kohm resistor should be pencil modded to 920 Ohm.
Still in parallel with 1.5 Kohm you will then measure 570 Ohm.
I've got a "little" problem with one of my 7900GTs and even though they're both vmoded (and were working without any issue @ 720 / 1900), the problem is not with the vmods. While messing around with my PC, I accidently pulled partially out the card out of the PCI-E slot and the result was that one transistor on the back of the PCB got burned out. It's the Q514 one (with six legs, some of them short circuited), originally "TN" is written on it. I couldn't find such anywhere on any other hardware, so I ask here wheather someone knows what are its measurings, in order to look for something very similar to replace it. Well, the board just can't be RMAd in such condition, so threre is nothing I can do, except trying to fix it on my own. I'll be very grateful if someone here can give me a clue what to look for and how to fix my dead 7900GT...
My experience, for what it is worth, is that when a component gets burned, many other components are dying at the same time.Quote:
Originally Posted by XpuctoC.
This means that the board will be most likely beyond repair.
If you want to persist anyhow, I could find out what Q514 is. At first glance it looks like a dual mosfet. About the function, I have no Idea.
I know there could be other dead components, that are not obviously damaged, however I still want to try replacing the Q514 and see if my XFX is gonna make it, or it's forever gone... So, if you think you can find out what exactly is this, supposingly mosfet, I'll be very happy at least to give the board chance of living :) Thank you for the fast reaction t024484, btw :) :)
In regards to the vmod for the mem, how important is the mem speed on this card, say from my current 800mhz and i can raise it to 900 how good is the speed increase?
also this guide is what i used,what are the max volts that these mem are rated for ? i ramsink on them and active cooling also. is 2.25v save for these babies?
also i had to add heatsinks on that ISL chip it gets as hot as those IC near the edge of the PCB
At page 22 of this thread, I showed a much easier voltmod for the GPU.Quote:
Originally Posted by Demo
Concerning your memory, I would not go much beyond 2.1 Volt.
The memory is specified for nominal 1.8 Volt, so 2.1 Volt is already quite a bit more, and I have very positive experiences at 2.1 Volt.
The effect of Memspeed versus GPU speed is roughly 1:2, meaning that 200 Mhz memory increase has roughly the same effect as 100 Mhz GPU increase.
Quote:
Originally Posted by t024484
yeah ive seen that volt mod guide of yours but i needed to do this in order for me to have a "swtich" like function for the voltmod, i cut some small strips if tape and placed it on the PCB where the link pases so if i need to turn remove the mod i just need to peel that small amout of tape placed and not have to redo everything.
As for the mem il try to keep it in 2.1v
but Samsung states how much is the max for this mem , 2.20v ?
Samsung says 2.25, but not under which conditions or how long.Quote:
Originally Posted by Demo
When the Mem is idling, it hardly draws any current, so 2.25 will be no problem, but under full load is can go as high as 1 Amp, or 2 watt, which is rather hefty for a package with a high thermal resistance.
Concerning memory voltage, I've been staying for a few months at 2,27V (resistance of 535 ohms for the third resistor under TP503) for both of the cards and had no single issue. I cool the ICs and the mosfet on the back of the card with massive heatsinks and a 120mm fan, blowing on them. Even though it had been relatively rare, there have been days when I've been playing Oblivion for 10 hours or so... In fact, no matter what cooling you're using, I wouldn't recommend puting any voltage over 2,15V - 2,20V for everyday use.Quote:
Originally Posted by Demo
t024484, any more accurate clue what is the "TN" element and what is the original resistance between its legs?
so its 2.1 then
I did some investigation and came to the following:Quote:
Originally Posted by XpuctoC.
Q514 is a somewhat unusual component.
Inside is a copper plate, firmy connecting points 1,2,5 and 6.
Below and connected to the copper plate is a piece of silicium which senses how much current is flowing from pin 1,2 to pin 5,6.
In some way this is translated to a signal on pin 3, with pin 4 connected to 12 Volt.
The pins 5 and 6 are connected via a 2.2 Kohm resistor to a ground signal of the external molex connector (since pins 1,3 are at 12 Volt, ca 6 mA of current is flowing).
So this circuit helps to answer the question " Is there an external powersource connected to the molex connector ".
With the external power connector in place, pin 3 becomes 12 Volt. Without a power connector pin 3 is at 0 Volt.
I have newer come across such a component, but all you have to do, is to connect the four pins 1,2,5 and 6 together and to connect pin 3 to pin 4. This situation simulates the presence of the external power connector, which is as it normally should be.
Do not try to test the board without the external power connector, because that will probably ruin your PCI connector.
Good luck.
Does anyone know if the paint mod, will work in the new KOs? N584
10x an awful lot, man! Did what you suggested, with a little bit improvisation, and now the card is just like a new one. Rebuilt SLI is flying in games and 3D tests without a single failure. Great help from you! Greetings from Bulgaria!Quote:
Originally Posted by t024484
Lucky you that nothing else was damaged.Quote:
Originally Posted by XpuctoC.
Glad I could help.
Where can I find the pix for this?Quote:
Originally Posted by t024484
mod: found it :)
Ive had 2 of these runnin in SLI mode without issues. Im runnin 1 now with 635core 740mem no mods stock fan.Quote:
Originally Posted by Kin Hell
Could you pls check your bios version mines is 5.71.22.12.03
kind regards
Well, I am not sure of all the mods as this thread is very difficult to follow and after 30 minutes I have yet to find the illustrations.Quote:
Originally Posted by DeToNaToR.cl
But I have done the simple Vmod to 1.4 on my Reloaded EVGA 584 and it works just fine. I see no reason that other variations wouldn't work as well (GPU vmod) as the only change seems to be from the Samsung memory to the Infineon.
I followed this guide: http://forums.extremeoverclocking.co...d.php?t=216265
It is quite depressing that Xtreme is erasing the pictures after some time.Quote:
Originally Posted by chas0039
I have already republished them a dozen times. This is not what you expect with a "sticky".
It is unfortunate, as many other forums on this subject refer to you as the expert. Thanks for all your work.Quote:
Originally Posted by t024484
BTW, do you still feel that a vMod to 1.4 would be an issue for wear and tear on the GPU now that the source of 7900GT problems has been found in the memory?
I know that there is a difference as the card will not switch between 1.2v and 1.4v, but the major hardware mods to enable the switching are beyond my abilities.
I think that 1.4 and even 1.5 Volt is OK, but if you have a choice it is even better to switch back to 1.2 V in 2D.Quote:
Originally Posted by chas0039
The tactics recently used, was nothing else but "If you cannot sell , confuse". What I mean to say with this, is that the Infineon memory did not solve anything at all.
My impression has always been, and still is, that the GPU is to blame.
The 7950 with a different type branding, seems have an improved G71.
So buying a 7950GT or a 7950GX2 seems to be the best thing to do as long as the G80 is to be expected.
Just for those asking for the pictures, here they are again.
Attachment 50708
Attachment 50709
Thanks for the answers. Almost everything I have read concerning the new series of EVGA cards is positive and no one seems to be experiencing anything like the failures of the old 7900GTs so maybe they did something to the GPU as well. In any case, I am very content at 1.4v and 625MHz and I seem to be running smoothly. As always, keep fingers crossed.
I just did the vmem "pencil-mod" on my eVGA 7900GT RoHS & I modded the rezistor to a 567ohm value. Before the mod I had 599/2040MHz (benchable) and now I have reached 599/2100 (alos benchable). I believe it's a little less then I expected, but in the folowing days I will also do the vGPU mod to reach 1,4V.
Cheers. :toast:
With a Mem frequency of 2040 Mhz, I see no reason whatsoever to do a voltmod.Quote:
Originally Posted by korby
Changing the Vgpu will certainly give you more miles for your money.
I hoped for a higher frecvency, but it I see that it doesn't make a big difference. :(Quote:
Originally Posted by t024484
This v-mod is for benches... I may not have the latest PC, but I always liked to overclock & bench it. Ask the guys from crazypc.ro about this. :)
PS: I lowered it to 561 ohms. This is the final value, but i'll test later.
We got a new shippment of Asus 7900GT on a blue PCB and using Hynix ram chips...
Will report next week how they do...
Woah your mem can do 1020Mhz un modded?!?! in insanely amazing!!! so lucky..
anyway,
im wondering how much the delta clock on the geometric core affect overall overclocking and overall lifespan of the card, the defualt delta on inno3d cards are +20.. i did change it to +50 and my 05 score jumped about 210 points..
Just for benching... :fact:Quote:
Originally Posted by Demo
But I can play games and all others @ 970MHz without problems. :woot:
so 1020 for gaming produces artifacts??
Yes, and believe it will also start to freeze, I haven't tried to play games. Only benches. For games I use standard frequencies because I don't need more. In the future I will overclock it in games too. :rolleyes:Quote:
Originally Posted by Demo
still 920 for stock voltage.. i can only do 810 at stock voltages.. so im running it at 800
I am having trouble measuring resistance on resistor K on my 7900GS. I shut off power, removed the board, then put both points on my multimeter on opposite sides of the resistor and did not get any readout. It doesnt matter if I put black prong to a ground or anything. What am I doing wrong here? I have the multimeter set to 200K and i get no reading, when I put it down to the lowest setting, I get a readout of .06, which happens to be the same resistance if I touch the two prongs together.......
I'm sure I'm overlooking something or just doing something stupid.....
I believe you are talking about the 7900GS. Here's a test (in romanian :p:). 7900GT with less pipes & Hynix 1,4ns.Quote:
Originally Posted by Shark-357
Nope my friend im talking about 7900GT!!!;)
I`l post post pictures of the card when i get home from work.
EDIT
.-------------------------------------
Just got home from work here are the pictures
http://img169.imageshack.us/img169/2...ture001qa8.jpg
http://img175.imageshack.us/img175/1071/2ja8.jpg
I cannot think of any other reason than that you are measuring the wrong resistor.Quote:
Originally Posted by Ramen
There are several somewhat smaller resistors with a resistance of 0 Ohm.
Well, I figured out the problem, it was a bad multimeter. Went out to RadioShack and bought a new one, and I can measure resistance fine. Weird =(
After doing the Resistor K mod, as well as Vmem I am still having trouble with my 7900GS. In fact, it did not help things at all. My memory keeps crapping out on 3D06 Deep Freeze......reallly irritating me, and I'm nearly out of options. I have passed Deep Freeze at 700/700, any higher on the memory and it is a screen full of artifacts at the end. If I drop core down to 600, the memory still artifacts on Deep Freeze at not even 725MHz....
Guess I can't really complain having picked up this card for $145..
About the pic in #640 , which do I join ?
:D
Reading seems to be a hard thing for you.Quote:
Originally Posted by aussie-revhead
I have included a new picture with the connections to be made.
Red = +0.05 volt
Yellow = +0.1 volt
Purple +0.2Volt.
Attachment 51405
So 1.5 Volt (my advice) is Yellow + Purple
!.55 Volt is R+Y+P.
You do not have to solder, conductive paint will do.
Thank you .
:D
Dunno if this has been posted, those of you who hate running 3rd party programs or even Rivatuner/built-in OCing tool in the driver ( both programs give me a ton of alt+tab problems ) if your brave enough to mod the bios clocks i say do so.. as the software based overclock doesnt revert the ram speed back to 2D mode, i reflashed my bios with a different 3D clock values and during 2D mode it reverts it to reference 7900GT core and mem speed.
Anyone have the original pictures from the #1 post?
Hi,
anyone having the Palit/Xpertvision 7900GS?
Pic:
http://139.18.42.44/~pete/tmp/vmod3.jpg
Where is the area shown in the above picture - I guess I'm blind... :( Or does the layout differ?
Looks like it has a different PCB.
Can someone please share the vmod pics on imageshack? I can't see the attachments for some reason, but I think the server transfer had something to do with it.
I have one, but can not see your picture :)Quote:
Originally Posted by dracoonpit
Quote:
Originally Posted by mr_mordred2095
Look at this thread:
http://www.xtremesystems.org/forums/...d.php?t=117220
Where picture jpeg?Quote:
The first card that I modded was an XFX 7900GT.
I noticed that I had to connect a 47Kohm resistor from pin 3 to +5Volt creating an offset in Vref of -30mVolt.
With this resistor I could run "Comanche 4 demo" with 710Mhz on the core, without resistor not above 630Mhz.
Ati Tools ran 710Mhz in all cases.
The reason to my opinion can only be that in demanding applications, like Comanche 4, because of a large fluctuating current demand of the GPU, there is much fluctuation on the Vcore.
These voltage fluctuations go beyond the OVP, which then shuts down the GPU.
By making an negative offset of 30mV, there is 30mV more room before the OVP trips. At the same time Vgpu is lowered by 30 mVolt.
I did not experiment with other values, but 47Kohm gave me the stability I needed to run Comanche at the same speed as Ati Tool.
Now I have modified a second 7900GT ( 1.55Volt, 2.1Volt, 45Kohm), this time from Gigabyte.
Much to my surprise I had to apply the same 47Kohm resistor as before to get Comanche at the speed that Ati tool achieved.
So if you are having some stability problems, the best tool that I know to test this is Comanche 4 Demo, apply a 47Kom resistor between the points that I have encircled in light blue in the Jpeg.
guys i have some :banana::banana::banana::banana:ty problem here .
modded gfx to 1.6vgpu mod , removed the caps voor ovp .
but when i run 800core with 1.6vgpu it reboots . i can do 800core easy on 1.5vgpu :(
gfx is under modded prom . pci-e @ 130mhz .
very strange any one can help me plz ?
already NR1 for 06 with single gfx :) http://service.futuremark.com/compare?3dm06=538646
Attachment 51703Quote:
Originally Posted by PAIIITET
hey guys big :banana::banana::banana::banana: here , 1.5vgpu mod all good , anything above it reboots :s
removed the 2 caps for ovp but still reboot , can some one help me :(
Sorry for the OT but has anyone got a dead card as I desperately need the light grey coloured square ceramic choke shown in the right bottom corner ??? :)Quote:
Originally Posted by Shark-357
I wonder how GPU voltage i can run on my 7950GT on phase safely? And also, how high vmem. I just did a pencil mod and got +0,2v (1,54V) on GPU and ran 3DMark05 @ 710/850MHz, got 12600 3DMarks. Still on stock cooling, with one 120mm fan blowing at the front of the card and one on the back.
Thanks :)
sorry for my ignorance... but is there a vmem mod for this card posted within this thread?
hello
i have a inno3d 7900gs. for some reason vgpu mod doesnt work although i tried the 0.05,0.1 and 0.2 v mod on both areas. the layout is similar to standard 7900 gt. any idea?
hmm... i tried this mod today...
the +0.2 gives me +0.3. strange....
That means 700 core is possible... 1.5v should be enough for that, if it can't then the core sucks ;)Quote:
Originally Posted by shimmishim
benchable or stable?Quote:
Originally Posted by Garrett
i was using atitool last night to test the core
it got up to 686 before giving yellow dots on the test.
it's stable at 675/1800, up from 550/1700.
not too shabby
I applied the 1.4v mod back then, got it 660 stable, but set it at 650 just to be sure, so yeah I guess if you come from 560 @ 1.2v to 660 @ 1.4v then 700 should be possible... stable ;)
Hi guys,
I have done the 1.5 Vmod and can run my core at 700 no problem. Now after I have installed the new Nvidia (with coolbits), my max mem clock adjustable range has changed from 800 to 1.6G (after auto-detect). What is going on there?
Now I re-read this thread and I can see some people quoting their mem setting 19XX MHz but some other has theirs at 8XX MHz. I am confused and would some one explain that, please?
Also I tried benchmarking with 3DMarks06 in 1280 x 1024 and get about 4500, does that sounds reasonable? Also, does the test resolution matter? if so what would we usually use for testing?
If I increase the mem clock to 1600 I get 5500 in 3DMarks06 which IMO is a sigificant gain. Too bad it's showing artifacts in ATITools and I have to lower mem frequency back to 900 before no artifacts is showing anymore. Do you think I should also do the Vmem mod as well?
Cheers,
hello all.. i got Leadtek 7900GS with the same PCB as the 7900GT showen in here :
http://www.xtremesystems.org/forums/...&postcount=543
is that means i should connect with pencil the places with the purple color and i will have 1.4Vgpu?
can some1 show me?
the picture below is a picture of my card..(pictured by me..)
i want someone to paint me on this picture where should i connect with a pencil for getting 1.4V..
Attachment 52632Quote:
Originally Posted by stingush
so i only need to paint this 6 points(2+2+2) with a pencil and it will get me 1.4Vgpu? right? because i dont have a conductive pen\solder in my hands now
ofcourse a regular home pencil is not a problem...
edit : i connected these points and now i was able to run 3dmark05 on core 600(before it only 575\580)
the card get 60c with atitool testing.. but i cant get more from 600.. so i think i only got 1.3V..
the mod is working.. but if i want more from 1.4V without soldering\conductive pen - is that possible?
edit2 : i painted the places with a more conductive B4 pencil and now i can go and bench in 645/890.. before the mod i chould bench on 575/890...
so.. because i dont have a multimeter.. is that means my card is on 1.4V or less? how can i know?
t024484
Good thread, thanks for the information. I have been testing these mods on a eVGA 7950GT KOSC and I think I am having some problems with overcurrent protection.
The 'K' resistor you mentioned was ~80khz on the 7900GT is 50khz on the 7950GT, so it looks like they changed that similar to what you had mentioned.
They have already connected the B and C points on the board for increased voltage.
At 1.55v I can get to 740mhz core stable, however, if I try 1.65v I get a black screen at anything over 700mhz in 3DMark05. I tried soldering the 47kohm resistor like you mentioned for the overvolt protection, but it did not change the black screens in 3DMark05.
Any ideas on what I can try? My 7900GTX did not have this problem and could be run as high as 1.8v without problems. This is on a waterblock from Viper John with loaded temps of 40C.
Thanks!
:toast:
It is all over the place that red=+0.05, yellow=+0.1Quote:
Originally Posted by stingush
and purple is +0.2.
So if you want 1,4Volt, only apply purple.
You have apllied all tricks that I now of. It seems that you have no more hardware options.Quote:
Originally Posted by VETDRMS
Have you tried to set a delta clock in the Bios when running 740Mhz/1.55Volt?
Performance goes up if you use a delta of 40 or 50Mhz. Just try what setting gives you the best results.
Quote:
Originally Posted by t024484
Thanks, I'll shoot John an email and see what he thinks.
The delta can run at 40mhz at ~792mhz GSE. I was expecting a little more from this card, win some lose some. The GTX ran as high as 840mhz core and 2140mhz memory.
I will try 1.6v and see if it still trips it. I have not tried increasing the resistance on the OCP resistor but I may try that.
Thanks!
thanks to your guide i managed to get 715/895 benchable(vmem = stock)
i get 1.5V with a pencil mod(checked with the vgpu monitor)
i get 90c @ full load and 75-80 in games.. is that fine? im currently using stock cooler+80mm fan as in the picture below..
and my score in 3dmark05 is flying :))
http://service.futuremark.com/compare?3dm05=2312727
Hi guys,
New here.
@t024484:First of all a awesome guide good work.:toast:
I have a eVGA 7900 GT KO 512Mb card and the card has a default 3d voltage of 1.45v.At these voltgaes the card clocks to stable gtx clocks ie 650/1600.But i wanted to go a little higher (I play oblivion which kinda needs more power) So I was thinkin to voltmod my card too,I have gone through both the voltmod guides but my card has the switching circuit ie in 2d modes its voltage is 1.2v and for 3d its 1.45v,in one of the post's i had read that the card might also be able to switch to 1.55v so i tried and flashed it with a bios that can give 1.5v but it was not able to do so.I also noticed that the yellow line is not short (0.1v) hence the card gets 1.45v (0.2+0.05v).I would love to increase 0.1v more and see how does my card can do.But again due to the switching circuit i was confused and wanted to make sure which points have to be joined,plase note that I'll be using a pencil as i dont have conductive ink for the time being and I dont want to sholder it.Any tips would be helpful so as how to go ahead with the pencil.
here is the pic of the voltage region of my card (clicked by me).
http://img137.imageshack.us/img137/2...0163ci1.th.jpg
please mark in this pic as which points need to be joined :) .
thax a lot.
Look at the first posting of this thread.Quote:
Originally Posted by i_max2k2
http://www.xtremesystems.org/forums/...d.php?t=103890
Aply the yellow line from the second picture and you will have 1.55 Volt.
Do not worry that your hardware looks a bit different, this mod is O.K. for you.
Good luck.
thx a lot that was a really fast reply.appericiate that.:)
will try this and post the results asap.Also do i need to do the bios to make it work at 1.55v or will the switching is gonna be forced at 1.55v instead of 1.45v?
I think i wont need the bios done.but a clarification would help.
thx again
Quote:
Originally Posted by i_max2k2
Have you measured vGPU using a multimeter. While the Evga bios has a 1.45vid my KO SC was 1.35v under 3D mode, and 1.2v under 2D mode, using the 1.45vid (VID-2) in the bios. My KO SC had both the 'C' and 'B' points connected from the factory yielding a .15v increase over stock = 1.2 + .15 = 1.35v.
:toast:
Kinda confusing here with 600+ posts :p:
t024484:
Can you please update your first post to all possible mods pencil/ink/soldering or at least direct links (with link to post # instead of page) to newly discovered mods. Some users might have different post per page count, so saying page # is not that good :)
hi i have measured it using a multimeter and have found that in 2d its 1.2v and in 3d ie playing a game is 1.45v :( ,i wish it wasnt so coz even with 1.45v my core can only do 650mhz stable.Also urs was a 256mb card and mines a 512mb variant although i'm not sure if that makes any difference ,but look at the pic except the yellow line -purple and red lines are already joined.I have tried using a pencil twice and couldnt connect the points so far,i'll try once again.Quote:
Originally Posted by VETDRMS
Also while doing the vmem mod i have noticed a strange thing ,I did the vmem mod and lowered the resistence to abt 560ohms and my memory was doing 830mhz stable (840 started artifactin in atitool) a few days later i took out the card and measured the resistance had dropped to 526ohms so i rubbed off the pencil mod on the resistor and after a few days did the mod again and lowered the resistance again to abt 550ohms,and while checking the resistance today i noticed the resistance had come down to 526ohms again.I'm unable to understand why would this be happening.After the mods I clean that area by blowing some air and then I measure the resistance with a multimeter before putting the card back in.
Any clues as y this would be happening?
thx
Hmmm, I could have been mistaken. The 7950GT I was working on was a 512MB version with the Infineon 1.4ns ram. I could have sworn when I checked it stock it was only 1.35v. Maybe eVGA is volt modding on their own to get some bad cores to bin with the higher end cards...unlikely.Quote:
Originally Posted by i_max2k2
Mine settled in at 751mhz core and 900mhz memory at 1.58v core and 2.19v memory.
:toast:
hi
yes that probably would be a likely ans,givin more voltage to make sure the core remains stable at those clocks.Well after using riva tuner and quitting on ati tool i'm able to go up to 670Mhz with my stock 1.45v ,that aint great but aint bad either,i mean i'm sure this chip would do a 700Mhz core stable with 1.55v (i hope)
btw
@stingush:dude did u do ur mod wit a pencil? if yes how exactly did u do it?
I havent been able to do this with a pencil and i'm still lookin for a conductive ink pen.
Guys do u know of ny way to do the vmod without pencil/conductive ink pen/solder :p: if yes please post,so that till the time i find a pen i can do the mod and see how far my chip goes .
thx
i connected all the colors together and all the points with a B4(very strong pencil) pencil and its working fine.. i think im limited by the cooling..
im on 1.5V core and 705mhz stable on the core.. my memories is just as good as someone can get - 1780 fully stable and 1800mhz benchstable...
so the mods everyone is talkin about here, the simple connect point mods with pencils: am i NOT to do this with the ink? i have a brand new conductive ink pen and i figure if im cleaning the card and redoing the mod, i should try out hte simple connects instead of the big arc on the top of the card.
but i want to make sure doing it with the ink pen instead of the pencil is ok.
The conductive ink will be more permanent than using graphite. I prefer to solder the connections. I desoldered the bridges that EVGA used and removed the J resistor and replaced it with a 50k resistor and used the bridges to get my target voltage. At 1.6v I would get OCP so I used a 47k resistor on the OVP to get a .3v drop in vcore. Loaded vcore came out to 1.58v with the core at 751mhz.Quote:
Originally Posted by el rolio
ok cool. just wanted to check that it works the same way. i have my isopropyl alcohol and im gonna clean off the entire back of the cards then use a toothpick or something and paint for 1.5 or 1.55v on the gpu i hope. this way it should be clean and should be enough power to get me to 630-650 i hope.
1.55v should give you 700mhz stable on core....
What happened to the link to the bios for this?
The switching from 1.2V to 1.4+...
Link?
Btw, just to confirm (Sorry!!!) you for 1.4V you connect purple ONLY on the third line from the top? Everyone keeps saying "read" but honestly it's not clear anywhere sicne the picture has 3 sets of lines.
Edit: Nm...why isn't http://www.xtremesystems.org/forums/...d.php?t=103890 stickied?
man, i redid the mod and still cant get past 560. is active cooling necessary for this thing to scale clocks? my buddy got 630 easy on these cards so im wondering if i need to throw a fan in there somewheres
well, bought a multimeter today, learnt how to use it, foundd hte points to test and see that im STILL at 1.2v. so i shall clean up and try the mod again, this time shooting for the simple 1.4v mod. i have conductive ink pen and will try to do it as best as possible.
does the pen have to be pointing straight down? does using a tooth pick help? would love to get this right this time.
I like the toothpick method because you can really control how much ink you get on the card... the pens can kind of be erratic in how much shoots/oozes out of the tip.. also, once you get the ink pooled in a spoon or something you have to work fast because it congeals very fast.. you should only need about 2 layers for a good conductive strip.. or one layer with patches in the thin areas..
can't wait to try it tonight!
as far as putting mini heatsinks on spots. i have the one on the top side (like you had it) but nothing on the backside. did i read correctly that that actualy hurt performance sometimes cuz of heat pooling? so leave the bakside of the cards where we do the mods SINK-free?
got to 1.4v finally. MM confirmed. clocked to 650 via ATI tool. even messed with gettin mem from 407.5 stock to 450. but its not as stable up there so im gonna see if 420 or 430 can work.
also got a nice lil 80mm low speed fan zip tied to the ends of the cards. but my oh my how the increased voltage spiked temps in the cards. and there is an effect on my cpu too, the increased heatdump IS notciable. but is'nt that why i have the expensive pump and expensive radiator?
so yea, thanks for all the help voltmod thread! i hope to learn more. oh and 7400 in 3d06 so thats a nice decent score reflective of my speeds now.
question. how do i set hte clocks permanently without coolbits?
You have to Flash the Bios.Quote:
Originally Posted by el rolio
would this do the trick then?
http://downloads.guru3d.com/download.php?det=1118
Hi.
I've just read and read, to make sure, that i didn't burn off my card when starting modding. So I decided to start with the 1.4v mod (connecting one of the purple on page 22). Using my multimeter, I can see that there IS a connection between the 2 points, but my knowledge in using the multimeter to measuring when the computer is on, is equal zero. How do I see that the core gets the 1.4 v, because it don't get any higher clocks at the core using ATITool.
EDIT: got it!
Can anyone tell me if there is one brand of 7900GT that clocks particulary well ? My Calibre hits a wall at around 750/830 but quite a few of you guys have passed 1000 on mem , what would you buy ?
Also , can you tell me what cards have 2d/3d switching ? I believe the EVGA SS does , but what others ? Can I still volt mod a SS ?
Any help would be great .
:rolleyes:
Will a card like this revert back to lower voltage for 2D use if 3D is modded to 1.55 ?Quote:
Originally Posted by t024484
:rolleyes:
anyone else getting random freezing with little coloured blocks all over the screen?
i cant reproduce it, and it is driving me nuts. vgpu at 1.55, switching frequency at 20kohm. vdd at 2.35v.
also, my XFX 7900GS had stock volts of 2.15. the stock volts for this 1.4ns speed bin is 2.0v. hence why people getting good mem clocks.
even though my mem seems to clock like crap.