yeah, thats interesting coz i had troubles running it at 39, sometimes at 38. Well, most of the probs i was getting is either it restarting, or locking up, usually in a game or screensaver. onve id restarted a error box came up saying id recovered from a serious error, sometimes it would say that VIA KM400 (my integrated video) had caused it. Now im usually right at 37, its faster at 2ghz than 1.8, mabye ill invest in a nForce2 Ultra400 chipset board, i think they have pci locks so i can lock pci and agp when i overclock.