That site didn't mention anything about crossfire with the Apple's ATI Radeon 5770 HD, they say it would work with the PC version of the video card after flashing them. I checked my card and didn't see anywhere I can plug a crossfire bridge or finger, I guess It's not possible to do it with my mac pro without getting the proper card.
I kinda regret getting this mac pro with this config, after I got it, it cause me nothing but trouble with one of the faulty 5770 video card. I thought it would be awesome for hardcore gaming, but turns out it's not true. I should had gone with the 5870 instead as people say it out perform dual 5770 in crossfire mode, or better off I should had bought a PC instead.
The reason I got a mac is because of Mac has awesome software like iWeb, iWork, Aperture etc. Also a new EFI technology as well as the blooming reputation of Apple (thought they would have outstanding customer support) which replaces BIO as Intel suggested BIO is an ancient technology, i thought it would allow more compatibility with new upgrades etc.
I should had done more research before placing my order, would had saved me a lot more money if opt for a gaming PC instead.
