Hello everyone. I currently run two displays, 27 ACD and a 24 ACD. I mainly use my machine in osx and would like to have a card dedicated to each display. The 5770 does perform well under osx for what I use it for. However, I do play BF3 mainly in windows and would like some extra performance. My question is, can I run a second mac 5770 under crossfire in windows? Is it just a simple crossfire cable as well as driver update? I was also thinking of a 5870 with a gt120 for the second display but that is quite a bit more money. or 6870 and a gt120. I am looking for a set up with the least amount of issues. Thank you for the help.