Hello! Right, when I play a game of counterstrike source or a similar game, after 15mins the pc will crash then shut down, not the normal windows shut down just a clean off... Erm, tried 3 bios's as just checking if it was bios, still happens with my clocks off, thought originally was the psu, however same problem after switching to a Seasonic 600w, S-12. Erm, do you think its the ram failing or my gfx ? I really want to know what it is, spec in sig, turned of clock now. It doesnt fail prime on hours on end, works ifne in windows, however when it comes to a game BANG... switch off... erm therefore turned of my overclock to stock settings.. Does this sound like the gfx as it jsut switches off in games.... Aaargh! Thanks in advance!