Knowing ATI's history of providing both 32 and 64bit EFI on the Apple Branded card, I wonder if the 5870 will work on an 06 model. The Card only requires 2 power connections, so the 4870 cables should work on the 5870 or the ones that ship with the 5870. When I bought the 4870 it had the two cables inside the box inside. Anyone looking at installing the 5870 on their 06 systems? The 27inch LED screen is tempting as well.