Artifacting/Random Crashes with 5870

[AaronP]

These issues I mainly see in Unreal 3 based games but in some games, like Mass Effect 1 and 2 the system completely crashes but I believe it's related.

I can get any UT3 engine game to artifact the exact same way, and Fur Mark happens to dupplicate the same issue perfectly:

http://leon2ky.com/leon/furmark_000000.jpg

The odd thing is not all games do this and most benchmarks run perfectly including: 3DMark Vantage, 3DMark 03-06, AvP Benchmark, RE5 Benchmark, and Heaven Bench DX11 2.0 all for extended periods of time. I've even left Heaven Bench + 4 Blended Tests of Prime95 running with no crashes/bluescreens for over 10+ Hours.

Here are my specs and video card information:

Specs: http://speccy.piriform.com/results/TDdi49IEh1Hh9rxAp8f9erd

Video Card: http://www.techpowerup.com/gpuz/wdbb6/

The Card on Newegg: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102883

I know it's the video card and I'm not convinced it is a bad card. Originally I thought it was the 3.7Ghz OC I had on it but everything tested fine (with the exception of the video card issues). The video card itself has never been overclocked.

The PSU is a 620W Corsair BTW.

I wouldn't be posting here if I wasn't at a wits end and hadn't spent hours looking on google and searching on [H] so please, no bullshit.