I have a dual 500mhz G4 i bought in August of 2000, and it has (i believe) an ATI 16mb vram graphics card. As far as I understand, this card will not support Quartz Extreme--is this correct? And, if so, would it be worth my money to put in a new QE-compatible 32mb vram graphics card? Is that possible, and how much would it cost? Thanks for the help.