Just built the following Case - Antec 1200 Mobo- Asus P6T Deluxe v2, bios 0504 CPU - i7 920 Memory - 3 x 2gb corsair 1333 HD - 2 x 1tb samsung sata2 spinpoint sound - creative x-fi extreme gamer psu - Enermax revo 85, 1050W CPU cooler - Titan Fenrir OS - Dual boot - Vista x64 and Win 7 x64 GPU - 2gb XFX HD4870x2 Everything works fine, I can play DVD's, CD's, open programmes, pretty much everything until I play games. Crysis will only play in a window and when I try to go full screen I get a bsod All other games I have tried pretty much go to bsod during initial opening sequences - ie graphics saying who game is by, intel inside etc - not even getting to the game. All games install fine, it is just a problem as soon as the games start. I am using the latest ATI drivers and have rolled back and tried previous drivers with no success. I also installed and am running Win 7 to see if games run under this os but there is no difference. Windows solutions advise me to go to ATI website for drivers/ solutions but I have tried this. The GPU is connected to the PSU by both 8 and 6 pin power connectors. I have not oc'd the system and all is running at default at the moment. Any ideas - or should I switch to Nvidia??