I have a Tuniq Tower 120, Asus Commando motherboard, an E6600 and 2 gigs of G.Skill DDR1000 memory (rated at 4-4-4-5 @2.2 V) and I cannot overclock very well either. I too am wondering if I got a crap E6600. My stepping is L640A820. I couldn't even hit 3.0GHz without rasing the vcore. Right now I have to run a vcore of 1.5 (1.45 according to speedfan, probably due to vdroop) just to maintain stability in orthos at a 3.2GHz. Something is just not right...