the other day my 6600 gt decided to drop its fan right out of its housing, so i went out and picked up a 7800gt. So i installed that uninstalled my old nvidia drivers and installed the ones on the included cd and restarted my computer. It then only got to that windows XP screen then it went to a blue screen then restarted. So i called up BFG they said that it needed 400w i only havea 350w power supply (doh) so i went back to future shop and exchanged it for a BFG geforce 7600 GS OC which is rated for 350 watts the same as my power supply. However im still getting the same issue i start the computer it goes to the "start windows in safe mode, networking, command promt, or normally" then it goes to windows xp loading screen that little bar runs once then it flicks to a blue screen for 1 second then restarts the process all over again. ive tried loading in safe mode aswell.
I really need this for school so any help would be great