Hey, I'm thinking about buying a used G5 tower, and I was wondering about the graphics card upgrade situation. Some mac cards available on places like macmall say that they are only compatible with the mac pro, but the dual core G5's had PCI express as well. Does anyone know if one of these cards will work in a G5? This one for instance:

http://www.macmall.com/macmall/shop/deta....mc_id=ZWB11877