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Overclocked GPU causing crashes

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  • Graphics Cards
  • GPUs
  • CPUs
  • Overclocking
Last response: in Overclocking
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March 24, 2008 4:06:58 AM

Specs:
Q6600@3.5ghz@1.45v
P35-DSL3
8800 GTS at 800/1964/1120
Antec Earthwatts 500W

This was working fine (both GPU and CPU passed stability tests), but when I played STALKER it would crash every few minutes. I suspected the CPU, so I increased the voltage to 1.475. Still crashed. Suspecting the game, I returned everything to stock, and it ran fine for hours. I kept the cpu at stock, and returned the GPU to oc. It crashed after 1 hr. I returned the CPU to OC, and ran the GPU stock and it played fine.

I OC'd my GPU back when my CPU was at 3.2ghz@1.3v. I ran ATI tools again, and it gives artifacts now.

- The house got to 80F today (27c). So everything is running hotter. I don't think the GPU is overheating though.
1). It only gets to about 65-70C. Stock, with the fan on auto, it gets much much hotter than that (85c+).
2.) It ran STALKER fine stock

I noticed there's a good V drop on the 12volt rail when I run the artifact tester. It will drop to 11.39 at times. The spec for the powersupply is +/- 5% which 11.4 to 12.6, so maybe this is okay?

However when I run small FFT and the artifact tester at once, the 12V rain drops to 11.29.
Is 500 watts not enough?

Makes sense but STALKER still crashed when I had the cpu stock and the GPU oc'd.





More about : overclocked gpu causing crashes

March 24, 2008 8:53:06 AM

just to let you know my spec of my 8800GTS(G92) 774/1911/1053.without volt mod the core is not capable of reaching 800 and 1964 on shader and 1120 just impossible.But if you are lucky if your graphics card is a good piece your memory maybe able to reach that kind of speed.But in my case no.the above is what i can achieve.And im pretty sure those speed for core and shader is NOWAY!!! and i have notice even if i overclock my memory to 1000mhz if the cpu temp go above 75C the whole PC will hang.but if i lower the memory and have high temp the thing wouldnt crash.so i would say the memory module is abit vulnerable to high heat.

hope that will help you.but i suggest you to set the same speed as mine see if you run fine.3dmark 06 with max res and max AA and AF to test it first.Pay special attention to GPU test 3 and extra attention to 4 to see if there are any artifact(or will just hang!!!) artifact that are not visible in GPU test 1+2 will appear on 3+4.remember to set the fan at 45% at least!!!
March 24, 2008 4:39:10 PM

I did some research on powersupplies. According to this calculator http://web.aanet.com.au/SnooP/psucalc.php, my wattage is sufficient, but there's not enough amps on my 12v rail for the settup that crashed.

I've got 34A and the calculator says I need 35.6A.

Last night I Re-OC'd the GPU with CPU running small FFT.
I got 787/1951/1107 which is closer to your OC. I backed everything down 3% to 765/1892/1060. I ran the ATI artifact tester for over 5 minutes w/ no artifacts.

According the calculator, I now need 33.5A on my 12V rail. The powersupply is rated +/- 5% so this may still be too close.


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March 24, 2008 4:47:02 PM

can you leave your full system spec inc fan and hdd and neon.anything in your pc that needs power.and what psu you use.even i oc seem very high but the actual speed of the graphics card is 774/1980/1053.what is your temp of the graphics card when play games?the ati artifact is not effective in todays cards.
March 24, 2008 6:11:54 PM

What makes you say ATI tool's artifact test isn't effective in today's cards? Any proof? Also what makes you say 800/1964/1120 is impossible? http://enthusiast.hardocp.com/article.html?art=MTQzMSw2...

[H] OC'ed the memory to 1120 with no voltmod. I also seen people hit 811 on core frequency with no voltmod.

Stop spreading fud and bring some proof in.

To OP: I take it that your system passes Prime95 small FFTs for 8hours and blend test for 12hours?
March 24, 2008 7:51:52 PM

well what i have been reading is that HDR rendering is more powerful then any other test.and there is a program called RTHDRBL.well all those high number is only possible when the fan is running on 100% and the OP dont want that.so what do you say?85C+ i dont think so.since the memory is only cert to run on 1000mhz anyway.but the quality might differ so you never know.
March 24, 2008 8:00:47 PM

Indeed, there could be quality issues, but nonetheless, it's possible.

Also 85C for load is the safe limit for gpus. It can handle 110C, but it's not really recommended.
March 24, 2008 10:10:33 PM

i know the gpu is capable of handling that speed.but i heard from people that the memory module is less vulnerable to heat inside the video card casing.
March 25, 2008 4:30:05 PM

Yeah the processor ran FFT's for 8hrs without issues. I didn't run the blend test because my memory is at stock settings (and slightly underclocked). My HSF is xigmatek HDT S1283. Core temps are below 70C (a little high, but the room gets to 80F before I turn the AC on ).
GPU stays below 67C (fan is set on 70%).

After I thought about this, I really don't think it is the powersupply because I can run FFT's while running the ATI artifact test with no problems. This combination has to stress the PSU more than just running Stalker. Only Stalker causes this problem. I run Crysis and Witcher fine (only other games I've played).


March 25, 2008 4:36:30 PM

so whats you graphics card overclock when your fan is on 70%?
March 25, 2008 5:10:06 PM

I thought the ram on those cards was actually only rated up to 1000 mhz? I could be wrong, but I thought above that you are doing physical damage to the electronic pathways (I can't remember the technical term) and eventually it all just fries out.

Also, I think you get a pretty good gain from the core OC, and the memory OC doesn't get you much more. So if you are running OK at OC'd core and stock memory, just leave it.
March 25, 2008 7:56:42 PM

basketcase said:
I thought the ram on those cards was actually only rated up to 1000 mhz? I could be wrong, but I thought above that you are doing physical damage to the electronic pathways (I can't remember the technical term) and eventually it all just fries out.

You're entirely right. There has been reports on people running the memory at 1100MHz and one day they couldn't anymore. So it's best to leave it at 1000MHz or less to prolong life.

To OP: Did you run ATI tools for more than 5mins? My vidcard would always freeze when the temps go over 71C when Oc'ed.
March 25, 2008 8:01:53 PM

yes same here.whenever the temp get over 70C the card will freeze.thats why i said there is no way he can run it on 1100 with fan on auto.it is only possible with everything overclocked but memory left default.
March 25, 2008 8:01:53 PM

yes same here.whenever the temp get over 70C the card will freeze.thats why i said there is no way he can run it on 1100 with fan on auto.it is only possible with everything overclocked but memory left default.
March 25, 2008 8:06:21 PM

Not impossible, but rather not safe.

If he doesn't crash on stock speeds, it means his OC was unstable or his PSU is not powerful enough. Or both. While 500W is enough, it's entirely possible the PSU isn't giving out all 500W. Anyways, I think it's the OC that's unstable.
March 25, 2008 8:13:18 PM

well anything not stable means not for everyday use.so i guess thats a no.about the psu.maybe he hasnt put his whole system on all the rails to balance it maybe?check billiardicus!
!