Researching on flashing PC video cards to work into Mac. There seems to be A LOT of 4870 versions out there... Granted they're getting harder to find due to phasing out for the 5770 and 5870. The successful 4870 cards seem to be the Sapphire 512MB or 1G and XFX ZDFC. I was pretty sure I was going with the 1G 4870 Sapphire (none of the exotic versions like Toxic or Vapor) but I came across some reading that Diamond and XFX ones are better and Sapphire have some problems. Any truth to that? And what are these problems (or that 1 DVI working, HDMI not working, etc) Or does anyone has any thoughts or experience in which cards work best to flash? Cheers!