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Questions on OCCT reliablility????

post #1 of 14
Thread Starter 
OK, so here's what I usually do to check my overclocked GPU's stability: I run MSI Kombustor for like 15 - 20 mins, 3dmark11, crysis/metro/lost planet 2/mafia 2/just cause 2 benchmarks and monitor them. If they're all passed and I don't see any major artifact then I'm set. Just now I download OCCT and give it a try... holy ****, it gets like over 100 errors within the first 5 mins. The temps also go skyrocket (~10C higher than Kombustor or ~20C higher than crysis). So here are my questions:

1. I know OCCT stresses GPU a lot and I don't usually need that kind of stress, but what would be an acceptable scanning result? Like how many error within how many minute is ok?

2. Any other testing program that actually shows you the number of errors/artifacts coz what I usually do with kombustor and other benchmarks is just to monitor them closely with my eyes.

Let's take my 460 hawk for an example. I've run it at 850/2000/1.000v since I purchased it and I've never experienced any crash or artifact before. Yet OCCT shows ~80 errors within the first 5 mins so I have to leave the memory clock at default (1800Mhz) and start the core OC again. It's stable at 850/1800/1.012v and OCCT still shows 3 errors in the first 5 mins at 900/1800/1.075v which I think the increase in voltage does not justify the gain in OC.

Gosh, this intense error scanning really drives me crazy.
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post #2 of 14
I always use OCCT to test my gpu oc's, it has never failed me yet. If it says theres errors then you need to up the volts or drop the clocks simple as that. No errors at all is the goal if you get errors then your oc isnt stable, period. I always test for 15 minutes and if its good for that long then I call my oc stable. Its up to you though if you want to run an unstable oc, me personally I dont. If it dont pass occt then it doent get saved as an oc profile.
 
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post #3 of 14
Quote:
Originally Posted by goldbranch View Post
OK, so here's what I usually do to check my overclocked GPU's stability: I run MSI Kombustor for like 15 - 20 mins, 3dmark11, crysis/metro/lost planet 2/mafia 2/just cause 2 benchmarks and monitor them. If they're all passed and I don't see any major artifact then I'm set. Just now I download OCCT and give it a try... holy ****, it gets like over 100 errors within the first 5 mins. The temps also go skyrocket (~10C higher than Kombustor or ~20C higher than crysis). So here are my questions:

1. I know OCCT stresses GPU a lot and I don't usually need that kind of stress, but what would be an acceptable scanning result? Like how many error within how many minute is ok?

2. Any other testing program that actually shows you the number of errors/artifacts coz what I usually do with kombustor and other benchmarks is just to monitor them closely with my eyes.

Let's take my 460 hawk for an example. I've run it at 850/2000/1.000v since I purchased it and I've never experienced any crash or artifact before. Yet OCCT shows ~80 errors within the first 5 mins so I have to leave the memory clock at default (1800Mhz) and start the core OC again. It's stable at 850/1800/1.012v and OCCT still shows 3 errors in the first 5 mins at 900/1800/1.075v which I think the increase in voltage does not justify the gain in OC.

Gosh, this intense error scanning really drives me crazy.

1. Zero. From start to finish.

2. I think the EVGA OC Scanner does, but only works for EVGA cards.


Some feel the need to use OCCT/shader 8 to get an OC completely stable. Same reason why you'd want your CPU, say 40 or 50 pass Linx/IBT stable as well. It seems for most people though, that these kinds of "extreme" stability testing aren't worth the headache, but I'd rather have a completely stable OC. Thus, I enjoy aiming for zero artifacts on OCCT/shader 8.

Others might tell you differently, and that's fine.


BTW, I'm OCCT stable at 925c/2250m. I'm "game" and F@H stable (no errors) at 940c/2300m.
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post #4 of 14
Thread Starter 
Quote:
Originally Posted by jdmfish View Post
1. Zero. From start to finish.

2. I think the EVGA OC Scanner does, but only works for EVGA cards.


Some feel the need to use OCCT/shader 8 to get an OC completely stable. Same reason why you'd want your CPU, say 40 or 50 pass Linx/IBT stable as well. It seems for most people though, that these kinds of "extreme" stability testing aren't worth the headache, but I'd rather have a completely stable OC. Thus, I enjoy aiming for zero artifacts on OCCT/shader 8.

Others might tell you differently, and that's fine.


BTW, I'm OCCT stable at 925c/2250m. I'm "game" and F@H stable (no errors) at 940c/2300m.
What's your current voltage for 460?
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post #5 of 14
Quote:
Originally Posted by goldbranch View Post
What's your current voltage for 460?
Max, by AB - 1.087. Never flashed.
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post #6 of 14
Shader complexity of 2 or 4 stresses Fermi cards MORE THAN SHADER 8 on OCCT.

Try it.
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post #7 of 14
A few errors at the start of a stress test are the result of vdroop and negative overshoot. When you move from an idle to load state, the voltage will drop to just below the level required and then bounce back up. This happens so fast that it may only generate 1 error in OCCT. It still means you have an unstable overclock

These graphs apply (in general) to gpus as well:
http://www.anandtech.com/show/2404/5
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post #8 of 14
Thanks for the tip of using OCCT. Ran it for an hour at 900 core. No problems, temps didn't even go above 43c but my GPU was 99% used.
post #9 of 14
Quote:
Originally Posted by Live_free View Post
Thanks for the tip of using OCCT. Ran it for an hour at 900 core. No problems, temps didn't even go above 43c but my GPU was 99% used.
power controller off ???


you under water ?
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post #10 of 14
Quote:
Originally Posted by ranerX3 View Post
power controller off ???


you under water ?


Could be very cool/cold ambients.
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