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OCCT:GPU Error checking strange results

post #1 of 2
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Hello. I'v been overclocking a HD4850 recently and I was having next to no problems until recently. I use OCCT as one of the tests for Overclocking. Especially the error checking feature.
2 days ago I had moved the memory clock to 1020 and it seemed stable after 1 hour of testing with OCCT. Today I have had some strange results however. With 1020 as the mem clock I was error testing and after 10-20 minutes OCCT instantly reported 1333 errors. Exactly 1333 but I had not noticed any errors and it instantly went from 0 to 1333. So I figured, well thats strange because it seemed to be stable for an hour the other day. So I dropped the clock to 1015 and started testing it. Of course after 20 minutes it did the same thing. EXACTLY 1333 errors again, instantly. Yet I had not visually seen anything happen at all.

Anyone else having or had a similar experience? Any idea if the card is unstable or is it just a glitch with OCCT? Suggestions? Thanks
Edited by CrazyDiamond - 3/27/11 at 1:38pm
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post #2 of 2
I also have found strange problems with OCCT test, eg if i set a unstable OC, OCCT artifacts, but 0 errors, i quickly press Escape to prevent my PC crashing.

Then i put clocks to stock, and run OCCT again, and now i get flickering artifacts (different to above) if i leave it running, itll crash the driver, so i press Escape to quit again.

Only way to resolve is a reboot, means after every failed OC i have to reboot to run another test.

One solution is to get the driver to fail and recover, then you can run OCCT again, but its rare for the driver to recover.

Could be a driver problem now thinking about it.
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