from my experience the P4 Northwood has excellent overclocking ability. I was running my 2.0 @ 2.76 with stock cooling and no problems what so ever for over a year. I have had less than desirable results with my p4 3.06 (800fsb) with over clocking. I will also say that its been my experience and many others that Asus makes some of the best boards for overclocking.