I OC'd my 6600k to 4.5 ghz, i set a +0.12 offset vcore, and its unstable in a veird way. I keep getting windows bluescreens, but cinebench and bf1 runs fine for an hour. CPU-Z says vcore is at 1.3 when it should be at 1.32 (1.2+0.12) I have an asrock fatality z170 board. My previous oc with 4.2 ghz stock vcore was fine. Couldn't get 4.4 with stock vcore though.