Hello all, I found this ad on CraigsList: ATI Radeon in my area and was hoping that this card was compatible with my current PowerMac G4: 2001 QuickSilver 733MHz, 1.256 GB RAM, and running Tiger at the moment(but runs Leopard very well). If it's not compatible with that one, I am considering picking up a dual 1.25 MDD(2GB RAM, 160GB HDD, and running OS X 10.5.8). The seller says that it is AGP, and since my PM had an AGP slot for graphics cards, I assumed it would work but don't want to buy on an assumption. Thanks for any help!!!