Crashing - Little squares

[looski]

Please help if anyone can. I was playing borderlands for 6 or so hours when all the sudden I got the little squares all over my screen. About 1 min later my screen went black and I had to reboot. Loaded up the game to have the same thing happen, 5 mins in then squares and then black screen. I rebooted then brought up crysis. menu and cut scene looked fine, gameplay hit and squares were everywhere. What is going ON?! I logged onto my current mmo crack Runes of Magic. It has much lower requirements even at high settings. Everything ran fine for the 3 hours I played. Just logged back onto borderlands to see if it was still doing this, and this time I didn't get squares, but just a black screen that never ends.

A pic, this is someone elses, but it looks the same. http://i163.photobucket.com/albums/t283/killer_snipa/P6290364.jpg

I checked, drivers up to date. Temps look fine, highest I was at is 65 degrees of ati testing my card. Here are some specs. Please if anyone knows, help a fellow cag out!

Intel i7 920 (not overclocked yet)
Radeon HD 5870
6GB Corsair doms
The thing has so many fans and chip is water cooled. My baby is sick

 

[kilm]

Looks like artifacts and a failing GPU. Take it out, if you have a spare computer, try it out on another.

 

[SEH]

If your temps are fine, the card is likely dying. Like kilm said, if possible, try it in another PC. If it's still doing it, time for an RMA.