something in the way the nForce was designed runs the pci bus independant of the fsb I guess. Maybe the twin bank memory architexture allows the speed of the CPU and RAM to be adjusted without effecting the PCI bus. I know I've read on Tomshardware and hardocp that you can up the FSB on nForce and your PCI clock stays what its supposed to be. Heck if I got Athlon XP 2000+ speed from a 1700+ chip I'd be perfectly happy. nForce just seems to be perfect because it has nice sound, lan, and decent video already on board.