Hello I currently have This machine, I have upgraded to windows 7 Ultimate, added 2 Gigs of Ram, and upped the Power supply to 400. I'm trying to install this card. For some reason it won't let me install the device drivers for the new card, because once its installed into the machine it won't boot past the BIOS. Then after letting it sit for awhile on the BIOS screen, you have to hold the power down to shut it off, then I have to repair windows. I'm running out of options. Any suggestions?