I'm using a 700w psu and my video card requires almost none of that to run. The card is not over heating, I've been monitoring it and I've ran stress tests on both it and my cpu over night and it's never crashed. It literally is only on this game and it seems to be a common issue with 660's and 670's. The card runs fine on all other games on extended periods of time.

I'll try underlocking it and see what happens, however I'm 99% sure it's not a power or stress issue.