Hi I have 2010 June mac pro. Spec is: Single 6 core 3.33ghz Manually updated Samsung 16GB of RAM ATI Radeon 5870 single with 2 power cables Manually updated Plextor M5 pro 512GB SSD These days my main task is gaming. I like dual booting OS (Windows 7 SP1 and OSX 10.8.2, but I'm planning to downgrade to Snow Leopard latest update) so I am very satisfied with my mac pro as my main system. No plans on getting pc desktop. Since most of the games these days require more power from VGA, I can't seem to run anything smooth these days. But prior to upgrading my VGA, I would like to have these points secure so that I won't have to worry if anything goes wrong: 1) Having boot EFI screens at all times 2) Having not changing my power source hardware (2 pins at max without frying anything) 3) working both for Windows and Mac 4) being able to work in Snow Leopard if I do downgrade I know that ATI 7950 is coming soon. But would that be the only choice that I will have? I've read Macvideocards' thread about using Nvidia VGA's, but they wouldn't work in Snow Leopard I believe because of the drivers. And as I see it, it looks like there always has to be manual process of flashing VGA if there is any upgrade from Mac OSX. (Since I just always update everything to the latest versions) Please enlight me on this as I didn't fully understand of the manul upgrade with VGA other than Apple is providing. Thanks a lot.