I have just built a pc to play games on but i have a problem with starting them. I have The settlers - rise of an empire, empire earth 3 and crysis. The games load to the menu screen but as soon as you try to play the game the screen just goes black and you have to restart the pc. the screen resolution is set to the same as when i'm using the pc normally so its not that. i've had crysis running before with no problems but now this is doing the same thing. i'm running a crosshair motherboard, a amd 5200 dual core chip, a raedon 4850 graphics and 6gb ram so the computer should be ok. Any ideas?