Help! My GeForce crashes.

[Sleeptyper]

Hi guys. Whenever I try and run just about any graphics intensive game, my computer freezes up. I just got a GeForce256 DDR. I try and load into just about any game when I am using ZDirect3d, and my whole damn system crashes, however, when I run DXdiag, it displays the images and sounds jus tfine. For Instance, I can load Unreal with software rendering, but it freezes as soon as I leave the intro video when set to direct3d. Same thing happened for carmageddon. Can anyone offer any help?? I have tried three sets of drivers (6.31, 6.47, and manufacturer)

 

[Shagga]

Did you uninstall the drivers completely first. Make sure you don't have any rogue files knocking about.