Updated questions
Alright, thanks for the help/reply everyone!
I actually red the sticky topic everyone is reffering me about. Though I have a question about it, why all this topic is only about Graphic cards for PC that works on Mac and have no words about the Graphic cards made for Mac? I'm wondering why nothing is said about these Graphic cards made for Mac.
Is it because PC cards are better/cheaper? And what's the point getting a PC Graphic card working on a Mac since most of them seems to appear to show some bugs etc, IMO I'd prefer to run a Graphic card made for Mac and avoid any problems, even since it's for work.
What programs are you running for 3d rendering? Does the software company list supported video cards?
I'm actually working on Maya 2013. Didn't checked about which Graphic cards are better/supported, but to be honest, I don't plan to works only with Maya so I'd prefer not base my purchace on only 1 software.
You can get an ATI 4870 up to 6870 from eBay that are EFI flashed that will work on Snow Leopard. Much cheaper than Apples crazily over priced ATI cards!
Alright, thanks for telling here, I'll check that out. Actually I think I'll upgrade to Montain Lion to get the better chances of my side, but if the one you pointed are better in term of performance/price, I guess I'll go for it.
Also another question that came up since I know pratically nothing about Graphic Cards other than the Wikipedia's page that I red. Which specification of the Graphic Card optimise the fast 3D renders? In other words, what specifications should I look for if I want to optimise my rendres time?
And last question, if I want to get a 2nd screen, is the DVI plug is always included with the Graphic Card or I need to buy one separately?
Thanks for the help everyone!