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Artifacting, artifacting, and... more artifacting!

post #1 of 9
Thread Starter 
Here goes:

Had a 580, worked fine on air.
Watercooled it, after about a week it started artifacting.
Turns out I'd left out a thermal pad.

Got a second 580, watercooled it.
Artifacted within a week, after some OCing.

Got replacement of first 580, it's been a month, and it's showing the very first signs of artifacting. Everything is stock.

In every case, the artifacts have appears as big black flickering lines in Just Cause 2. There were a few snow storms with the first card, and a BSOD with the second, and eventually snow in other games as well.

The current card, so far, only artifacts in JC2.

I'd really love some help with this. First I figured, ok, thermal pad missing, VRMs overheated, then maybe it was my OCing. Aside from the fact that I've no idea what's causing this, what would make it happen with everything at stock?


Despite the signature, I have one 580 in my rig at the moment, and the CPU's at stock speeds and voltage.

Edit: After running OCCT's PSU stress test, I noticed my 12V rail doing this. Is that normal?
Edited by Serephucus - 5/1/11 at 8:33am
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post #2 of 9
if your 12v rail is really doing that then that isn't good, you may want to grab a, multimeter and actually check.

as for the artifacts, it could be that power issue, or it could be that your TIM is not spread well on the GPU and you are not getting consistent contact with the block. it could also be something shorting out on the block, but that seems unlikely. do you have VRAM cooling on the back of the card?
post #3 of 9
just as kevin has said, you definitely want to get that psu checked out.
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post #4 of 9
Thread Starter 
After a bit of googling, OCCT showing weird things with the 12V rail isn't uncommon. Should it be sitting steady at 12V, or only pulling what the card needs?

The card's running on air at the moment, haven't so much as touched the stock cooler. I don't have multimeter, so I can't check. I'm planning on a big summer upgrade though, and one of the things being changed will be the PSU. Can't do it right now because I have exams in a couple of weeks.

Could other people give OCCT a quick run, try and verify results to see what the norm is?
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post #5 of 9
what are your temperatures?

and the 12v rail should ALWAYS be within .5v of 12v
post #6 of 9
Pull the cards for a couple hours, reinstall 1 card at a time and check for artifacts.
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post #7 of 9
Thread Starter 
HWMonitor also shows my 12V rail at around 6V under load.

Card hasn't gone above 81 yet.

There's only one card in there at the moment. Still have to RMA the second one.
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post #8 of 9
I doubt your 12v rail is actually as low as 6v, I suspect you wouldn't be able to use your computer at all if that was the case, but you definitely need to get a multimeter and test that anyway.
post #9 of 9
Thread Starter 
Just tried with Everest, and it's reporting my 12V rail between 12.048 and 12.092. OCCT still shows it going nuts.
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