BSOD Playing Almost all games

Hey, I recently built a new PC and have been having BSOD troubles in basically every game, from the decades old (Planescape Torment) to the brand new (DotA 2, LA Noire). I have ran memory tests on the RAM which have come up completely spotless, also have re-installed graphics drivers (ASUS 7970) multiple times and even attempted a fresh install of Windows 7 (64bit). I have also updated my...