Hi Everyone, I need to replace my graphics card which is an Nvidia 8800GT so I can do gaming in Windows 7 Pro via Bootcamp. The games will be primarily BF3, BFBC2 and Modern Warfare etc. Before I delve into the debate about which card to put in I just need some clarification on a couple things as follows: Can I put in say a Radeon 6780 in 1 slot for use with W7 and leave the 8800GT inplace for OS X? or Could I put in 2 x 6780 card and have them both running together (I believe this is Crossfire mode) for use in W7 & OS X? Ultimately I want to get a great gaming setup for use in W7 via Bootcamp. The 8800GT does all I need it to do in OS X. Your help and advice would be really appreciated.