There are alot other threads on just this topic but I thought i'd try making another one to answer my questions better. I also hope that it might help others having questions regarding graphic cards and i will therefore make some sort of summary of what i have learnt so far in the first post. Do correct me if im wrong! Here comes a few questions and when answering them it would be great if you put the numbers before the answer. Links to websites with good test or so are apreciated. 1 Q. Will a card without mac support still work? A. It will only work in Bootcamp and and the fans might still be going in OS X even though the card isnt working. 2 Q. Will nVidia SLI work? A. In OS X, no. In Windows it normally wont, but there are 'special drivers' for the 7300 that will enable SLI. 3 Q. Will ATI CrossFire work? A. In OS X, no, but it will work in Windows 4 Q. What mac compatible desktop(not workstation) cards are there? and which one is the most powerful? A. As far as i know: GeForce 8800GT , 8800GTS 512(With GT firmware)> HD 3870 > HD 2600, GeForce 7300 > Radeon 9200, Radeon X1900XT. Im sure there are more, so feel free to post/PM other! (cards separated with > means (I think) the first is better than the seconds and those separated by , I have no idea of which are the better.) 5 Q. Is SLI and CrossFire equally good/effective? A. See the next post by Mangaroo. Can anyone confirm it and/or can you (mangaro) post the links? 6 Q. I read in a post that at least one ATI card produces a 'crisper' image, is this true? A. "Might produce a slightly smoother image". 7 Q. Probably only me wondering but anyway: What will perform best in games, and what performance difference will there be(8800GT, HD 3870 and Dual HD 3870? A. If you have any other question you would like me to add, post it or PM it to me and I wil add it.