I can get the block stable at 190 with QPI/VTT voltage of 1.455. Not sure if that's too high. I can also get the CPU clock stable at either 21 or 22 with a vcore of 1.2. However, when I try to set both, I can't get the system stable no matter what I do. It lasts for about 5 min under Intelburn then BSOD. I have 6GB Corsair Dominator 1600, all I did was enable the extended profile and set the spd to 6, then back to 8. Both were stable. I've tried increasing the Vcore up to 1.33, but that hasn't done anything except increase my temps. I have turbo disabled and LLC set to 2. I don't want to increase the VTT anymore as it's already high. I'm also running hot at full load on real temp. I have a thermalright Ultra 120 extreme. I'm pretty sure I can get it stable at 180 block, but I really want 4ghz.