Hi, i have succesfully built my 15th computer 3weeks ago : Generic Case thermaltake 420w psu Amd Athlon XP 2800+ (barton Core) MSI - kt4v 2x512mb DDR 400 pc3200 Generic ram western digital 200gb hard drive nvidia 5200 fx everything was working fine untill i decided to get a better graphics card "sapphire 9700 pro ultimate edition" i uninstalled the old drivers and then installed my new card. i logged into windows an installed the latest ATI drivers cataylst 5.6. rebooted my computer then it got up to the login screen part, the screen is all black with a mouse in the middle but i couldn't move it. seconds later the screen went black and shortly later the compter reset. i tried to boot using the last recent settings that worked in the boot options and i logged into windows and then seconds after doing that the screen went black (stand by mode). Can anyone Help becuase this is getting to the stage were i will need to hire a jackhammer.