Enable turbo and speed step, and adjust the multiplier in turbo in addition to tweaking the bclk. I've hit 4.45ghz with my 3820 in a matter of minutes. I haven't tried to tweak it more because it's blazing fast as it is already. I couldn't be happier with this chip. I mean come on, it's a SB-E chip without breaking the bank! (Unless you invest in an expensive motherboard, like the ASUS P9X79 Deluxe like I did, but it is worth every penny.) Edit: It is also cheaper than the 2600k, I can't complain.