Hi guys, I got my MP 2.8 Quad last week with stock config. The games are brilliant with the 5770. HOWEVER... me being me, i want to upgrade the graphics card already to future proof myself more (battlefield 3, and 4 and 5 ). I've seen a lot of threads about the graphics cards on here, but i need to know: - What is the most powerful card which can be used in the Mac Pro WITHOUT extra cables/ peripherals. - Do any of the 69XX cards work in the Mac Pro? Which ones and how? Cables? - Would there be space for a 2nd card insertion if the first was a 69XX? Thanks a lot Oh, and it is fine if the card works only under Windows, as long as there is enough space to keep the 5770 under Mac.