Mike A said:
I'm trying to find out if it's possible to run a standard, off the shelf PC video card - eg: let's say an Nvidia 7900 GT - on the MacPro when it's used as a Windows XP box.
Has anyone tried it?
Yes they have and yes it is 100% possible. It basically just a pc afterall.
Problem arrises when you boot back into osX
Your mac wont like the card and wont recognise it, which is ok, but means you have to keep your mac card installed.
Which back in windows causes big big headaches and may mean you get no display....