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My expensive video board in Mac Pro (early 2008) died. I couldn't afford a apples-apples replacement so I got a lesser board. It works for the BootCamp Windows 7 partition, no problem.

When I BootCamp to the Mac OS partition, I get a Mac spinning wheel for about 2 minutes, then the computer simply powers off.

How do I get the Mac OS to recognize the new board? Thanks, in advance!

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AFAIK you need a special firmware/BIOS for your video card. If there's no such firmware for the card you bought you should return it and get an "official" video card

[edit] I found an article that states that Macs require special drivers (well, we knew that) and firmware (that's what i'm saying here).

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I don't think that makes sense, otherwise it wouldn't work with the Windows partition. – KnomDeGuerre Sep 26 '10 at 19:52
I don't know any details about the differences between "Mac" video cards and the default ones, but i know for sure, that (at least a while back) video cards for Macs required to be equipped with the correct firmware. – lajuette Sep 26 '10 at 20:49
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