I just bought 2 hand mac pro 1,1 that came with broken x1900xt. So i install PC 5770 (Power color 5770 vortex) now my pro doesn't have a grey boot screen. DVD player crash, stream games (FM2012) crash. connect my monitor (Dell U2711) through display port doesn't shown anything. About this mac report it as ATI 5000 1024 MB. rather than 5770. can i fix this?