Hey, I know this gets asked a lot but I'd appreciate if someone could help. I've got a Mac Pro1,1 (Mid 2006) with a 7300GT installed. I want to upgrade the card as cheaply as possible. I've looked on Apple Store and according to reviews/comments the ATI HD 5770 will be compatible, but its £199!? The PC version is only £100. I know you can flash the ATI 4870, but even this is out dated now? And most of the links on the guides here are dead/the stores don't stock them anymore. Is it possible to buy a PC version ATI HD 5770 and flash it to work with my Mac Pro? Cheers.