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Trust OCCT's GPU Scan? - Page 2

post #11 of 29
OCCT is extremely hard on any GPU... but if you really want a stable overclock, I think you should run the test for at least 30mins without error.

Otherwise, you'll have an unstable overclock. It might do whatever you want everyday, but still, personally I think overclocks should be rock stable.

Also, yes, the GPU error scan is correct.
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post #12 of 29
Quote:
Originally Posted by born2bwild View Post

Also, yes, the GPU error scan is correct.
So what is that really based on?? Because thats what people say?
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post #13 of 29
Quote:
Originally Posted by lightsout View Post
So what is that really based on?? Because thats what people say?
IIRC it is constantly checking the rendered image from your GPU to a reference image pixel by pixel. If it detects differences then it counts those as errors. Why does it only artifact if I enable the error checker though? I mean it would say i had like 500 errors and I would see them, but with the error checker disabled I do not artifact.
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post #14 of 29
OCCT will error out when it gets too hot (normally on my 480 it starts giving errors at 98ish) If your FPS is dropping as you up the voltage it could be the card throttling to keep itself within its thermal threshold.

Maybe the algorithm is only written to check for errors if you have it enabled, in other words it won't display the errors (If you look at it one error is a lot bigger than one pixel so I have a feeling that regardless of what kind of error it will show it as a big white spot).
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post #15 of 29
OCCT is a good program only use it it will give you the most accurate result if your OC is stable...
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post #16 of 29
Thread Starter 
What people aren't reading is the fact that I can make it 100% stable in the Crysis test at 800/1600/1950 @ 1.013v but I get like 1 error in 30 minutes of OCCT. I can make it through over an hour of OCCT at 800/1600/1950 @ 0.963v but then it crashes when I raise Crysis to over 8x AA.
post #17 of 29
Thread Starter 
Ok now it seems I can't even get through 10 loops of Crysis at 16x at 800/1600/1950 @ 1.013v and the more I increased the voltage, the faster it crashed. What is going on here? I'm not looking for some ungodly OC, I just would like 800/1600/1950. Is it possible my motherboard is causing this or I have a bad card?

BTW, the fan speed is on a custom fan profile, I haven't seen it get above 70C in Crysis or OCCT.

EDIT: Ok, just for kicks I tried running it at 800/1600/1950 @ 1.100v in OCCT and started getting errors less than a minute in. Is there something wrong with my card, should I RMA it?
Edited by Tyler Dalton - 1/16/11 at 4:29am
post #18 of 29
increasing voltage doesn't give you more stability. GPU overclocking is different than CPU. just experiment more.

imo 1 error in 30 min is rock stable imo. your card isn't designed to be super stable like the tesla, graphics rendering doesn't need that level of stability.
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post #19 of 29
Quote:
Originally Posted by Tyler Dalton View Post
What people aren't reading is the fact that I can make it 100% stable in the Crysis test at 800/1600/1950 @ 1.013v but I get like 1 error in 30 minutes of OCCT. I can make it through over an hour of OCCT at 800/1600/1950 @ 0.963v but then it crashes when I raise Crysis to over 8x AA.
cause it is probably not stable

if you want the most accurate just aim for a OC where at crysis and OCCT you got stable results .

try to play with the voltage and speed a little and fined a stable point...
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post #20 of 29
OCCT's a pile of crap. i just go by kombustor/furmark if i dont artifact in 10 minutes at least and the games i have dont mess up then i say im stable.
 
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