Hey, I'm looking to buy a graphics card for my AGP G4, but would like to go buy it at comp usa, or the like. All the Radeon and NVIDIA cards they have there say they are only for PC's. Does this mean that the drivers that come with the cards are for PC's, and that I can just download the mac drivers off their website?, or is there a difference in the actual hardware of the cards. My thinking was that an AGP and a PCI card were the same, except for the drivers. Thanks