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Trust OCCT's GPU Scan?

post #1 of 29
Thread Starter 
Ok this is really weird, I have a GTX 570 with a VID of 0.950v. I can run 800/1600/1950 at 1.013v in both OC Scanner and Crysis Warhead with 20 loops at 16x AA and have no problems what so ever. Within a few minutes of starting the OCCT GPU test I get errors. I even bumped the voltage up to 1.050v and then got errors after only a few seconds in OCCT. It seems like the more I increase the voltage, the faster I get errors in OCCT. This is only happening in OCCT, I'm getting no artifacts in OC Scanner. What is going on? Should I trust the OCCT readings?
Edited by Tyler Dalton - 1/15/11 at 10:56am
post #2 of 29
OCCT is killer. It's really hard on the GPU.

Edit: I could do the same thing on my GTX 465. 800/1600/1800 stable at .975v in any other benchmark/stress tester. OCCT GPU stress test found errors in seconds. I think about 25000 in 5 seconds. Bumping up the VCore a lot helped.
/hwaw
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/hwaw
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post #3 of 29
Thread Starter 
But see, if I lower the voltage down to 0.963v, it passes in OCCT but then crashes when I do the loops in Crysis at 16x AA. I also noticed that the more volts I am using the lower the "fps" in OCCT's test shows.
post #4 of 29
Quote:
Originally Posted by Tyler Dalton;12021153 
But see, if I lower the voltage down to 0.963v, it passes in OCCT but then crashes when I do the loops in Crysis at 16x AA. I also noticed that the more volts I am using the lower the "fps" in OCCT's test shows.

how about try 850/1700/2000 @ 1.063v
post #5 of 29
OCCT is very stringent. usually it starts giving error once you pass a certain thermal threshold. for me, 1.087v 900 MHz 1100 MHz i get errors once my temperatures go higher than 80 C. but when i games, it doesn't get anywhere near 75. OCCT doesn't show errors at 75, so i know my card is stable at temperatures less than 80 C
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post #6 of 29
sometimes MORE voltage is actually worse. it can make it unstable and crash faster than if it were lower.
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post #7 of 29
I'm not sure what is happening to your card, to course your stability issues. But I trust and use OCCT when I need to stress my overclocks on any card.

But I'd start by upping the core in small increments and when you find it becomes unstable adjust the voltage and test once more.
post #8 of 29
OCCT is really hard on the GPU. My GTX 470 was running 805/1610/1674, and could run Crysis and any other game I through at it just fine. Within 30 sec of running OCCT I had a bunch of errors. I now have to run it at 755/1510/1674 to be occt stable.
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post #9 of 29
I stopped using OCCT, as like you it was fine in anything but it. Some will say your not stable but if its fine in everything else I'm happy.
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post #10 of 29
Something very interesting I noticed is that I only artifact if I tell it to do error check. If I do not select it then I do not artifact. Could this be that there is a bug with the error checker?
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