I am curious what the maximum FSB speeds people have gotten with whatever setup. At 170mhz the northbridge is getting quite toasty, not bad enough to hurt my finger but close. I have lapped my northbridge heatsink and used AS3 on it in hopes of reaching at least and FSB speed of 180. I later realized lapping is quite useless for the northbridge heatsink since the nForce2 northbridge+IGP has a recessed metal core (no good contact anyway).