Hey guys. Recently a lot of my games have been crashing in that they just stop/freeze and Ctrl-Alt-Del does not work. I have to reset the PC. This mainly happens with FPS like Rainbow 6 Vegas and Stalker. It hasnt happened so much with RTS like C&C3 or Supreme Commander. However I have also been geting blue screens of death. (on C&C, Stalker and R6) The only major hardware changes recently have been adding a new SATA HDD. Other than that nothing since I built this PC. Its really doing my nut in because I cant enjoy many of my games. They just feeze up and I have to restart the PC. Should I try re-instaling windows? Hardware wise, its an Opteron 165 runing at 2.6ghz (OC'd), 2gb Corsair Ram, a Galaxy 7900GT (not OC'd) and an ASUS A8n-SLI mobo. my 2 instaled HDDs are a 74gb WD Raptor and a Hitachi 350gb HDD. Other than the crasing I also get a lot of artefacting. Textures suddenly change colour, or the tectures suddenly "spike". My current set up isnt really that old, but could it be that the GPU is faulty or overheating? Cheers.