Hi there, new to the forums and to Mac. I have up till now always bought cheap budget PC's... and had all the usual problems. I am considering one of the new iMacs, but I'm wondering if the graphics card can be changed? I do alot of rendering, and a quadro fx graphics card from Nvidia is the way to go. They make a mac version for the Mac Pro, so the software/drivers situation is covered, but with the specs that the IMac has now I'm wondering if I can fit a quadro fx graphics card in the iMac? if you look here http://gizmodo.com/5388225/ifixit-imac-review-gallery//gallery/1 you can see a small seperate board, which I assume is the graphics card seperate from the mainboard. Are there any better photos that ive missed?