Hi! I want to use 3 x 24" displays with my new MacPro I'm about to order. Is it possible with 2 x HD 4870 cards and no other card installed? What actually happens if you install 1 x GT 120 and 1 x HD 4870? How will they work together with different tasks, does for instance playing of movies then go fast and smooth on one monitor, but less good on the others? Is it even possible to have 2 x HD 4870 cards installed only? It doesn't seem like one can order a MacPro with 2 x HD 4870 only? Thanks in advance for helping sort things out for me!