I'll be getting a free PCI-Express ATI Radeon x1900GT PC Version video card from a friend who will be upgrading parts of his computer. I was wondering if anyone knew if this card would work in OS X on a Mac Pro because of it's model similarity to the officially supported x1900XT and the fact that Power Mac's ran x1900GT's in OS X too. Even if I can't flash an EFI firmware to the card, it might still work in OS X once it gets past the boot screens maybe? I've read of some x1900XT working unflashed in that manner, I'm hoping a GT might work similarly. (Of course, I currently have the nvidia 7300 currently in the computer.) Any info would be so much apperciated. Thanks. P.S. I've read up on the whole 6-pin pci-express power cord situation and all that too, so I understand all the tidbits about installing it. I'm just wondering about it working in OS X.