I have the 35w 2400+ XP-M, I can get it to run at 2.7GHz completely prime95 stable and full load will be 45C, but that's really only during these winter months, so currently I'm running 2.5GHz on it, 100% rock solid stable, I've benched it, gamed hours on it, works freakin great...right now I got 166x15 because all I have is a CL2.5 PC2700 256mb stick and a CL3 512mb PC3200 stick, but then PC3200 will run 2.5-3-3-7 instead of 3-3-3-8 if you downclock it to PC2700 speeds, so currently I did that to keep my system all communicating at the same speed. I got lucky and got the IQYHA stepping and it seems to be quite the overclockable little bugger...moreso than the 2500+ or 2600+ XP, for true overclocking you're better off with the 35w 2400+ XP-M or 2500, 2600+ XP-M, the mobile chips absolutely rock for overclocking. Half the wattage, way less vcore, made from the same core (barton) and way easier to keep cool.