Powercolor Theater 550 pro freezes windows


Sep 26, 2009
OK I have a great system that I built asrock A780Gxh/128M mobo vista 64bit seagate HDD 2 4870 in xfire. I also have a theater 550 pro. it used to work just fine, but one day my computer would not boot( it would go to the windows loading screen and freeze) took out this card and it worked fine. every time I have the card installed it freezes have latest drivers and bios but still no go. if anyone has a solution or has had this problem please help.