Yesterday I purchased an original Mac Pro 1 1 for $500. Pretty great find. Works perfectly. Completely stock. I'm primarily going to it for Bootcamp to run a video game frontend called HyperSpin. So I've been looking in to what upgrades I should make that are within my budget. I found an ATI Radeon X1950XTX for $30 and will be buying it tonight. I've done a lot of searching whether or not this card will work in my Mac Pro, and I still can't quite find a definitive answer. So it seems once I have Bootcamp installed, this card should work with no issues in Windows. But while searching for information on using it in Mac OS, I'll I've found so far is a rom by JCool that allows this card to work in Mac OS 10.5 on a Hackintosh. Does anyone have a definitive answer as to whether or not I'll be able to use this with Mac OS X 10.7? If not will my Mac OS install default to using my stock 7300 GT? If that's the case it's not a huge problem because I won't need to use updated graphics while using Mac OS, but it would be preferred if I could. Thanks guys.