Believe methere was no accident about it! The Macintosh version of the Radeon 5770 costs at least twice as much (if not more) than the Windows version of the 5770. I ordered a new video card for my 3,1 Mac Pro and accidentally ordered the ver that doesn't say 'For Mac Pro' not realizing that there was any difference.
ATI Radeon HD 5870, offered as an upgrade kit The Radeon HD 5870 card requires Mac OS X 10.6.4 or later and the use of both auxiliary power connections. Problem is once I install it onboard my screen doesn't even turn on. I was aware that some cards aren't compatible but I read in some forums that tha HD5770 would work on Mac Pro. My current card is ATI RadeonX1900 but I want to replace it with a new one. I just bought the XFX ATI Radeon HD5770 for my Mac Pro (from Mid 2008).
