I am talking about the new Mac Pro of course. PC video card manufacturers are bringing out overclocked 8800GT cards. I don't know of any Mac software for overclocking nVidia cards. On the PC side, RivaTuner is supposed to be very good software for overclocking video cards. Can I use RivaTuner in Windows on the Mac Pro to overclock the 8800GT? I assume the overclocking would remain when I reboot back into OS X?