CPU: Intel Core i7 975 @ 3.33GHz Motherboard: ASUS P6T6 WS Revolution Graphic Card: Radeon XFX HD 4890 PSU: Corsair TX750W Memory: Corsair XMS3 DDR3 6GB (3x2) O/S: Windows 7 Pro, 64-bit GDU: ASUS VW225N And loads of fans! I have recently purchased this machine, one of my intentions is gaming. I had played Grand Theft Auto IV with little issue - worked fine, although the PC did hang when exiting. I have just bought some more games (Assassins Creed, Batman:Arkham Asylum, Dragon Age Origins & Fallout 3), I installed them, and now I cant play any games, the moment I attempt to start them up the computer freezes to a black screen and I have to restart the machine. Even Grand Theft wont start now. Any idea what the problem could be? Hope someone can help as I spent a fair bit on the computer and for it to not play games is disappointing to say the least! One thing that i should mention is the RAID controller that doesn't seem to be functioning properly. The drivers wont update (there is none currently installed). I think this is for installing extra S-ATA drives. Could this be connected? Otherwise I am clueless as to the problem.