7900GT over voltage protection?

Printable View

Show 100 post(s) from this thread on one page

04-04-2006, 10:02 PM
***Deimos***

Quote:

Originally Posted by Roger_D25

Deimos,
Thanks for the quick reply, yeah my card is on water with a DD maze4 block (1/2" ID). The thing is I've had this card water cooled since I bought it with the same setup. I guess I should mention though that I took it off to gain better access to the memory IC's because I installed 8 OCZ ramsinks.

It was very late last night when I was finally able to start testing sytem after the ramsinks and VGPU mod so I wasn't able to pull the card out to take a much better look at it but I will today after I get out of class. I will take a close-up shot of the voltage mod I did but I think everything was done right (But I will leave that up to you guys)!

After I wrote my first message above I shut down my system and scraped off a small gap in the conductive ink trace I made between the D511 pad and ground, unfortunetly the problem still persisted. Also, I had mentioned that when I hit the "Detect Optimal Frequency" button my machine would just shut down, well that happened most of the time but after I made the gap in conductive ink it doesn't shut down anymore. Now as soon as I hit the button my screen gets a bunch of tiny colors dots all over, similar to snow flakes but they are different colors. Also at the same time the screen starts to blink on and off, on and off!

Last but not least everything seems to be fine until I either hit the "Detect Optimal Frequency" option or when I manually change either the core/memory clockspeed and then hit the "Test Frequency" button. My computer does the same things either way, lots of tiny colored dots and then screen starts blinking on and off. I'm expecting bad news guys but I truely was very, very carefull when doing this. I did it on a non-conducitve mat and also used a wrist strap. Plus I've done voltage mods to my last 3 cards with no problems.

PS, Did anyone have any idea as to what the ERROR MESSAGE means or what it has to do with? Thank you guy so much, I know you guys know how bad it sucks when a piece of your hardware is on the frits.

I've seen similar problems (dots, blinking, restart), with poor heatsink contact (in your case the waterblock). Try this. Remove waterblock, and go back to the stock heatsink.

(That is all assuming that the PSU you are using has worked properly with similar high-power video card, since that may also have caused this)
04-04-2006, 10:15 PM
***Deimos***

Quote:

Originally Posted by skankinred

Will the attached picture work on a 7900GT as well????

Deimos has it listed under GTX. But on this wesite: http://sg.vr-zone.com/print.php?i=3330 it shows the instructions under the GT section.

-----------------------
All you need is conductive paint. Copper or silver, make sure it's 100%. I reccomend CircuitWriter http://store.caig.com/s.nl/sc.2/category.174/.f
First remove the resistor marked above and replace it with a 50K ohms resistor. This will give you 1.5v for VGPU.

If more voltage is desired, I suggest you move onto step 2: removing the 2 resistors marked to disable overcurrent protection for the card.

You can then move onto step 3: Soldering and connecting this point to any grounded spot. This will give you 1.6v.

Instead of step3, you can do step 4 if 1.7v is required.

Found on:
http://www.xtremesystems.org/forums/...&postcount=188

Many have done it at xtreme:
http://www.xtremesystems.org/forums/...t=92874&page=8

User Powerstrip to OC:
http://www.entechtaiwan.com/util/ps.shtm

Nvidia 7900GT compared to other graphics cards:
http://sg.vr-zone.com/?i=3335

Details @ VR Zone: http://www.vr-zone.com/print.php?i=3437
Power Consumption/Heat Output/Chart
Geforce 7900GT @ Default voltage/Speed 64 watts
Geforce 7900GT @ 745MHz 1.5v 87 watts
Geforce 7900GT @ 780MHz 1.6v 101 watts
Geforce 7900GT @ 800MHz 1.7v 111 watts

READ THE THREAD

It seems (like others) you are confusing MANY different things together:
* initially, a typical variable resistor volt-mod was developed. It worked perfectly fine.. up to +0.07-0.09V. The IC monitors and ensures voltage is withing +/-0.1V.

* some clever guy noticed that the IC can use two voltage tables... replaced resistor mod to change from 1.2V->1.5V.

* however, to change the voltage all you have to do is give the IC a different Vid signal! Its like selecting a number from a list... thats how easy it is.
D508 to gnd => +0.1V
D511 to gnd => +0.2V
both => 0.3V
for 99% of people that's all you need to know.

* if you have the appropriate extreme cooling, and want 1.7V, yes, you follow Shamino/LardArse guide at vr-zone. It is both applicable to 7900GT and 7900GTX... however, remember that the Vid pins MUST still have a valid selection. (ie you CANT do both D511 and D508 to ground AND replace resistor.. that would be 1.5V +0.3V = 1.8V -> invalid)
04-04-2006, 11:25 PM
skankinred

Look, I understand the instructions perfectly. For 1.7V with water cooling, replace resistor with 50k pot and remove both voltage regulator resistors. Then ground D511 to gnd => +0.2V for a total of 1.7V.

My question was will this work with GT since YOUR post says it's for the GTX. Over at VR Zone it is shown under the GT section. Since VRZone said they took the information from YOUR post, I trust what you have to say first. But since your post says for "GTX" I wanted to know if it still works for GT, that's all.
04-05-2006, 06:33 AM
Richteralan

Quote:

Originally Posted by skankinred

Look, I understand the instructions perfectly. For 1.7V with water cooling, replace resistor with 50k pot and remove both voltage regulator resistors. Then ground D511 to gnd => +0.2V for a total of 1.7V.

My question was will this work with GT since YOUR post says it's for the GTX. Over at VR Zone it is shown under the GT section. Since VRZone said they took the information from YOUR post, I trust what you have to say first. But since your post says for "GTX" I wanted to know if it still works for GT, that's all.

Quote:

Originally Posted by ***Deimos***

READ THE THREAD
It is both applicable to 7900GT and 7900GTX...

Case closed.
04-05-2006, 07:18 AM
skankinred

Quote:

Originally Posted by Richteralan

Case closed.

He never said if it work on the GT before. I was simply asking if it does. Of course I read the thread. Look what I posted under my question .

edited for flaming.
04-05-2006, 11:07 AM
Roger_D25

Deimos,
Thanks for the suggestion, it's probably the only thing I havn't done yet! It's now been almos 2 days and most of my problems have worked themselves out as weird as that sounds. Initially I was unable to run benchmarks, play games, or change clockspeeds either manually or by using the "Detect Optimal Frequencies" option. I could physically change the sliders to different speeds, and I could also hit the "Test Changes" button. The problems didn't start until after that when the "OK/Cancel" window would pop up after hitting the "Test Changes" button. If I clicked OK, my screen would immedietly fill up with artifacts, blinking on/off, and eventueally shut my system down.

Then late last night I tried for the hundredth time to manually change the clock speeds, well this time it worked fine, I clicked "Test Changes" and it did it's little test with no problems. After that I tried playing CODII for the hundredth time (every other time I played anygame it would just shut my system down within 3 minutes), again this time it worked fine! I played for about 2 hours with no major issues. The only problem was very minor artifacting when the background color was white, oddly enough after playing for about an hour this just went away and now I can play any game with no artifacts at all even if my card is overclocked.

The only remaing problem is if I hit the "Detect Optimal Frequencies" button. I just did and unlike every other time it actually went through the whole testing phase, then after it was done I went to hit "Apply" on the driver control panel and everything froze along with the same artifacting again? Because the problem is so random I can't make heads or tails of it?

All I have left to do is to pull the card out again and completly go through it with a visual inspection and to try the stock heatsink like you said. I didn't have any solvets to help remove conductive ink so I just used a tiny flat-head screwdriver and a magnifying glass to carefully scrape off resisdual ink but someone suggested using alcohol to remove any leftover stuff because it doesn't take much conductive ink to create a path between two things that shouldn't be connected! Thanks again guys for bearing with me through this!
04-05-2006, 02:52 PM
MoaFun

Hi all :D i m new here :p

I am very interested in this 1,40 even 1,55v pen mod

I m about to buy a 7900gt

I wanna ask.. is there a difference between between these CO Superclocked (evga) or Extreeme TOP edition (asus) if i do the 1,55v mod (in the picture below) which are sold with higher clocks

I ll change the fan to VF900...

i have the fallowing choice..

XFX GeForce 7900GT XXX Edition 256MB PCIe 2xDVI/TV - Retail EUR 359,90
XFX GeForce 7900GT 256MB PCIe 2xDVI/TV - Retail EUR 309,90
XFX GeForce 7900GT Extreme Edition 256MB PCIe 2xDVI/TV - EUR 339,90
Club3D GeForce 7900GT 256MB PCIe 2xDVI/TV - Retail EUR 309,90
Gigabyte GeForce 7900GT 256MB PCIe 2xDVI/TV - Retail EUR 314,90
PNY Verto GeForce 7900GT 256MB PCIe 2xDVI/TV - Retail EUR 319,90
Asus Extreme N7900GT TOP 256MB PCIe 2xDVI/TV - Retail EUR 349,90
Asus Extreme N7900GT 256MB PCIe 2xDVI/TV - Retail EUR 319,90
MSI NX7900GT-T2D256E PCIe 256MB 2xDVI/TV - Retail EUR 304,90
Gainward Bliss 7900gt...
Pixelview 7900gt...

Any suggestion ?

Thx for any help in advance

http://img458.imageshack.us/my.php?i...vmod1552oc.jpg
04-05-2006, 03:26 PM
Roger_D25

I am pretty sure that all of the different 7900GT cards are very similar as far as hardware goes MoaFun, the main difference between the cards you metion (eVGA superclocked, Asus Extreme Edition) are their stock clockspeeds. Besides the clockspeeds and heatsink designs there is not much else differnt between any of the new 7900GT's. With that being the case and the fact that you will be replacing the stock heatsink anyway I would just get the cheapest one you can find. I say this because you will be putting a better heatsink on the card which should allow it to run cooler and there for allow you to run higher stable clockspeeds. I wouldn't even get the extreme edition or superclock cards as they are more money and part of the increased price is the better stock heatsink which you'll be replacing anyway. BTW, welcome to the forum!
04-05-2006, 05:17 PM
***Deimos***

MoaFun,
First of all, before all else, you should look at distinguishing features. eVGA has trade-up program. XFX has double-lifetime warranty.

As for clock speeds, you dont have to get the fastest one, but I would not advise getting the reference clock ones (450/1320), especially from smaller manufacturer. I posted about this already, but guess that nVidia does preliminary test, and ships fully functional at 450Mhz cores to board manufacturer's. After initial testing at 1.4V, the absolute best cores probably go to GTX (this would explain that even after 1.4V mod, GT's barely hit GTX clocks, whereas GTX get near 700). Now, I pressume manufacturer bins for OC versions.. ie the best cards go to OC versions.

Some OC versions have really high clock rates, but also price! But for only a few extra dollars you can get 500/1500 or 520/1500 versions which I think are the best deal.
04-06-2006, 12:17 AM
MoaFun

:D haha Deimos.... almost the opposite of Roger_D

I'm am purchasing it online.... at the next stock available..(13/06/2006)
at a very popular online shop :D

sorry to ask but whats a trade-up program :D (my english sucks)...

well i was thinking about an XFX

XFX GeForce 7900GT XXX Edition 256MB PCIe 2xDVI/TV - Retail EUR 359,90 (550)
XFX GeForce 7900GT 256MB PCIe 2xDVI/TV - Retail EUR 309,90 (450)
XFX GeForce 7900GT Extreme Edition 256MB PCIe 2xDVI/TV - EUR 339,90 (520)

well I "just" want to get 700/1800 with an VF900 ... (with 1.55v pain mod)
I'll see which one is first available since all 7900 are out of stock everywhere :D
04-06-2006, 01:17 AM
iL .PoLLo

i have done the 1.4 volt mod.
Now i want to try the 1.55 mod. :rolleyes:

The blu line represents my actual mod

http://img388.imageshack.us/img388/5737/provamod9oq.jpg

I soldered the two points, I didn't use a pencil or silver paint.

To get 1.55v do i have to change the second soldered point from 511 to 508 (from the blu line to the yellow line?) Or I have to solder the 511 AND the 508 point?

And I also want to increase the memory voltage from 2.02 to 2.22

I tried whit a pencil but it doesn't work

Can i solder the 2 points whitout resistor? like the picture

http://img220.imageshack.us/img220/645/memorymod8jh.jpg

Thank you :woot: :woot:
04-06-2006, 09:29 AM
Dazog

What is the best chemical to use to remove the conductive ink.

I want to redo my 1.55v it seems i don't have a good enough trace to keep it running smoothly above 650.
04-06-2006, 09:36 AM
Haltech

It should actually just lift off with the use of a fine point needle. Otherwise, try Alcohol and if that doesnt work, finger nail polish remover :)
04-06-2006, 09:38 AM
Per Hansson

Quote:

Originally Posted by Dazog

What is the best chemical to use to remove the conductive ink.

Rubbing Alcohol

Quote:

Originally Posted by iL .PoLLo

To get 1.55v do i have to change the second soldered point from 511 to 508 (from the blu line to the yellow line?) Or I have to solder the 511 AND the 508 point?

/usr/bin/Rant
I wont even bother answering; I'll do just as you, post another question when the answer has already been told atleast 10 times in the same thread.
killall -9 Rant

Quote:

Originally Posted by iL .PoLLo

And I also want to increase the memory voltage from 2.02 to 2.22

I tried whit a pencil but it doesn't work

Then it did not have enough lead in it...

Quote:

Originally Posted by iL .PoLLo

Can i solder the 2 points whitout resistor? like the picture

No, you can not solder the points, since you will then leak all current to ground that would otherwise go to the vsense pin on the voltage regulator
it will think the chip is not getting any current at all and ramp it up as high as it can, blowing it up!
04-06-2006, 10:03 AM
snakeskinner

Quote:

Originally Posted by Per Hansson

/usr/bin/Rant
I wont even bother answering; I'll do just as you, post another question when the answer has already been told atleast 10 times in the same thread.
killall -9 Rant

ROFL, now that made me laugh. You made my day.

Marlon
04-06-2006, 03:59 PM
doom_st

1 Attachment(s)

with this mod i can raise the core voltage in 0.05v steps from 1.2v up to 1.55v
04-06-2006, 04:15 PM
OmegaMerc

Quote:

Originally Posted by Per Hansson

Then it did not have enough lead in it...

Pencil's have been lead free since way back. They only contain graphite.
04-06-2006, 10:37 PM
iRoNeTiK

Quote:

Originally Posted by Roger_D25

Deimos,
Thanks for the suggestion, it's probably the only thing I havn't done yet! It's now been almos 2 days and most of my problems have worked themselves out as weird as that sounds. Initially I was unable to run benchmarks, play games, or change clockspeeds either manually or by using the "Detect Optimal Frequencies" option. I could physically change the sliders to different speeds, and I could also hit the "Test Changes" button. The problems didn't start until after that when the "OK/Cancel" window would pop up after hitting the "Test Changes" button. If I clicked OK, my screen would immedietly fill up with artifacts, blinking on/off, and eventueally shut my system down.

Then late last night I tried for the hundredth time to manually change the clock speeds, well this time it worked fine, I clicked "Test Changes" and it did it's little test with no problems. After that I tried playing CODII for the hundredth time (every other time I played anygame it would just shut my system down within 3 minutes), again this time it worked fine! I played for about 2 hours with no major issues. The only problem was very minor artifacting when the background color was white, oddly enough after playing for about an hour this just went away and now I can play any game with no artifacts at all even if my card is overclocked.

The only remaing problem is if I hit the "Detect Optimal Frequencies" button. I just did and unlike every other time it actually went through the whole testing phase, then after it was done I went to hit "Apply" on the driver control panel and everything froze along with the same artifacting again? Because the problem is so random I can't make heads or tails of it?

All I have left to do is to pull the card out again and completly go through it with a visual inspection and to try the stock heatsink like you said. I didn't have any solvets to help remove conductive ink so I just used a tiny flat-head screwdriver and a magnifying glass to carefully scrape off resisdual ink but someone suggested using alcohol to remove any leftover stuff because it doesn't take much conductive ink to create a path between two things that shouldn't be connected! Thanks again guys for bearing with me through this!

The problem you been experiencing is felt by many. Myself and a few others on hardforum.com and MANY more on the evga forums..it seems this problem is widespread so go here and read more stories of peoples problems like yours

http://www.evga.com/community/messag...TOPIC_ID=13545

I just found this out today from someone on hardforum. I been meaning to tell you but it took forever for a moderator to activate me fully hehe.

Here is the link to the guy and myself having problems with eVGA 7900gt

http://www.hardforum.com/showthread.php?t=1040429

Let us hope for the best. I know some people alreayd RMA their card to get a 2nd one and have the card have the same problem after a couple days! :(
04-06-2006, 10:59 PM
loser7787

yup

So, i did the 1.4v mod and it worked great, I actually tried with a pencil and some compressed air first with no luck actually after my second attempt it turned all my screens blue normal boot, just gave everything a blue hue after that i went and got a defrost repair kit and some tape and it worked great, got 7900 gtx speeds, 650/1650 and even using the stock 7900 gt crappy cooler only hitting about max 60 and between 40-45 idle. I was wondering if their is an easy way to increase the memory voltage a little to squeeze more speed out of it?

Athlon 3000+ Venice at 2.6Ghz at 1.5v
Asus A8N SLI
1GB PQI Turbo DDR566
EVGA 7900 GT CO Superclock at 650/825 at 1.4v
250GB 7200RPM Maxtor Diamondmax
ULTRA X-CONNECT 500W PSU
04-06-2006, 11:05 PM
loser7787

Quote:

Originally Posted by Roger_D25

Deimos,
Thanks for the suggestion, it's probably the only thing I havn't done yet! It's now been almos 2 days and most of my problems have worked themselves out as weird as that sounds. Initially I was unable to run benchmarks, play games, or change clockspeeds either manually or by using the "Detect Optimal Frequencies" option. I could physically change the sliders to different speeds, and I could also hit the "Test Changes" button. The problems didn't start until after that when the "OK/Cancel" window would pop up after hitting the "Test Changes" button. If I clicked OK, my screen would immedietly fill up with artifacts, blinking on/off, and eventueally shut my system down.

Then late last night I tried for the hundredth time to manually change the clock speeds, well this time it worked fine, I clicked "Test Changes" and it did it's little test with no problems. After that I tried playing CODII for the hundredth time (every other time I played anygame it would just shut my system down within 3 minutes), again this time it worked fine! I played for about 2 hours with no major issues. The only problem was very minor artifacting when the background color was white, oddly enough after playing for about an hour this just went away and now I can play any game with no artifacts at all even if my card is overclocked.

The only remaing problem is if I hit the "Detect Optimal Frequencies" button. I just did and unlike every other time it actually went through the whole testing phase, then after it was done I went to hit "Apply" on the driver control panel and everything froze along with the same artifacting again? Because the problem is so random I can't make heads or tails of it?

All I have left to do is to pull the card out again and completly go through it with a visual inspection and to try the stock heatsink like you said. I didn't have any solvets to help remove conductive ink so I just used a tiny flat-head screwdriver and a magnifying glass to carefully scrape off resisdual ink but someone suggested using alcohol to remove any leftover stuff because it doesn't take much conductive ink to create a path between two things that shouldn't be connected! Thanks again guys for bearing with me through this!

My fathers EVGA 7900GT Superclock was just having the same problems, couldnt adjust core or memory speeds at all or it would lock up and give artifacts, like diff colored snow on the screen and games or benchmarks would not run through. It would lockup or if you closed a game or program computer would reboot after a few minutes of playing, we tried pretty much every hardware/driver solution we could think of and no luck. RMA'd it back to newegg yersterday, I would say thats your best bet, good luck.

Athlon 3000+ Venice at 2.6Ghz at 1.5v
Asus A8N SLI
1GB PQI Turbo DDR566
EVGA 7900 GT CO Superclock at 650/825 at 1.4v
250GB 7200RPM Maxtor Diamondmax
ULTRA X-CONNECT 500W PSU
04-06-2006, 11:15 PM
alpha0ne

Quote:

Originally Posted by loser7787

My fathers EVGA 7900GT Superclock was just having the same problems, couldnt adjust core or memory speeds at all or it would lock up and give artifacts, like diff colored snow on the screen and games or benchmarks would not run through. It would lockup or if you closed a game or program computer would reboot after a few minutes of playing, we tried pretty much every hardware/driver solution we could think of and no luck. RMA'd it back to newegg yersterday, I would say thats your best bet, good luck.

Hmm bad luck everyone having problems with the eVGA cards, I hope things work out for the best :cool:

I was soooo close to buying that card too mainly due to their very good warrantees but ended up saving quite a few $ (about a $100AU) with the MSI NX7900GT that seems to OC as well as any other card on the market;)
04-07-2006, 01:43 AM
quijonsith

Quote:

Originally Posted by loser7787

So, i did the 1.4v mod and it worked great, I actually tried with a pencil and some compressed air first with no luck actually after my second attempt it turned all my screens blue normal boot, just gave everything a blue hue after that i went and got a defrost repair kit and some tape and it worked great, got 7900 gtx speeds, 650/1650 and even using the stock 7900 gt crappy cooler only hitting about max 60 and between 40-45 idle. I was wondering if their is an easy way to increase the memory voltage a little to squeeze more speed out of it?

Athlon 3000+ Venice at 2.6Ghz at 1.5v
Asus A8N SLI
1GB PQI Turbo DDR566
EVGA 7900 GT CO Superclock at 650/825 at 1.4v
250GB 7200RPM Maxtor Diamondmax
ULTRA X-CONNECT 500W PSU

Yes there is, read the thread.
04-07-2006, 03:24 AM
graham_h

I've got my stock XFX 7900GT going just fine with the 1.4v mod.
Thanks for the info guys :)

http://img110.imageshack.us/img110/5...651core8by.jpg
04-07-2006, 03:38 AM
skankinred

:banana::banana::banana::banana:, my eVGA card is messed up. I try to run 3dmark06 and it blinks on and off, or artifacts till blue screen, or freezes and reboots. Time to RMA this POS. Too bad I was getting 8400 score in 3dmark 06 before it craped out on me.
04-07-2006, 03:53 AM
jVIDIA

Did you do something to that evga ? mods ?

Show 100 post(s) from this thread on one page