thanks Rob,i dont want to mess with the EFI partition modification so i prefer something easy to install.
edit i found this 2 cards on ebay...
http://www.ebay.com/itm/Radeon-HD-5...925333?hash=item3ac22e6bd5:g:o7kAAOSw~oFXHtaQ
http://www.ebay.com/itm/ATI-Radeon-...045690?hash=item2ef03d503a:g:KtEAAOSw3mpXDqO9
they can work together?thanks in advance.
The changes to make the EFI partition and doing the install are very, very well documented (indeed I would say they are pretty perfect). Its very easy to make the changes and should take a maximum of 15 minutes even if you move your lips whilst reading and need to use a finger to trace the words
Whilst it requires you to use the command line, the changes are all cut and paste commands and it works very well. I can recommend doing this 100%.
The other advantage is that one single 280X card is worth about two 5770's. Power consumption is also significantly less.
Back to the video cards you linked to. YOU DO NOT WANT TO BUY THESE CARDS. I'll repeat that. DO NOT BUY THESE CARDS. and just in case the message hasn't gone in. WALK AWAY FROM THESE CARDS.
You don't want these cards as they have been reflashed to work with real, genuine Apple Macs. You do not have a real, genuine Mac, you have a Hackintosh.
The reason these cards are flashed is so that the video output will work on a genuine Apple Mac during booting. A 'standard' PC 5770 will NOT show the booting screen on a genuine Mac. The opposite is also true. The video cards that are for Apple Macs will NOT show booting on a Hackintosh. Standard PC 5770 video cards WILL show booting on a Hackintosh.
You should be looking to buy cheap 5770 PC cards, not anything that is reflashed. A standard 5770 video card will work out of the box. You should be looking to pay a maximum of $50.
However if you can afford it I would still go with the 280X, choose the right 280X and spend 15 minutes doing the EFI mod and you will have a very good GPU system AND still have space to put another 280X in for even more speed.
Rob