Nvidia presentation here:
http://www.techpowerup.com/reviews/NVIDIA/nForce5/1
ntune looks interesting to me. Might be nifty. They are utterly silent so far as I can tell about OCing the cpu, but it seems to me that this must have that capability as well, bringing the ability to pick Intel/AMD's pocket a bit (hey, I do it too!) to a lower technical level user.