I just recently replaced my 200 gig ide harddrive with a 1 TB SATA hardrive, as my old one kicked the bucket. I have reinstalled windows xp and all drivers and got everything working. It is working better than ever ,as my old harddrive was sluggish for some time before it died. But now i am unable to play any 3d games. They boot up fine ,but whenever anything is rendererd in 3d it hangs at random intervals for a good 10-15 seconds then continues for a few seconds and hangs again. I have tried half life 2, swat 4 and ceaser 4. Swat 4 even hangs in the menu screen, though i believe thats because objects are rendered behind the menu. Half life hangs and repeats sounds while hanging. Ceaser 4 also hangs and eventually crashes my display drivers. I have tried shutting down all extraneous programs. It is a fresh windows xp install fully updated with all protection installed so virisus and mal ware are not a problem. All drivers have been updated, and so has directx. I have also checked the temp of my processor before during and after the problem. My video card doesnt have a temp sensor , but i have opened the side of my case and put an industrial fan blowing on high into it, with no changes. Changing any in game geaphic settings seems to have no effect also. any help with this would be apreciated , Thank you windows xp pro service pack 2 m2n-sli delux Amd 64 4200x2 1 gig ddr Nvidia 7600gt