Artifacts at stock speeds and voltage on gtx 580

[Funkwagen]

I've recently been getting artifacts on screen (quite noticeably at times) with my gtx 580. The problem was getting worse, to the point where Just Cause 2 became unplayable because it'd crash after about 5 minutes. It appears artifacts start appearing at 68c, and things quickly get bad from there. (Ive gotten the checkerboard pattern once so far)

I decided to try another PCI-E x16 slot, same thing happens. Another thing to note is that this card has been unable to complete a single GPUGRID task since I've had it.

tl;dr: Artifacts while playing games, artifacts detected in EVGA OC scanner, switching PCI-E slots did nothing, appears artifacts show at 68c or beyond. Switching drivers has no effect, including a full removal. RMA time?

The PC I'm referring to is the first in my sig, and I believe an 875w power supply is plenty to support the system.

[Chickenfeed]

Given you've tried everything reasonable, I'm going with RMA time. A bummer for sure but what can you do. EVGA don't put up too much fuss fortunately. Shipping from Canada isn't the quickest so you may be without a card for a while, I've replaced a motherboard and a gpu and each took roughly 3 weeks before I had the replacement product ( cross shipping only is available to the folks to our south which suckzors )