What you think about Disabled Voltage Offset.
Maybe is better 0.005V. Some people say it's not good to Offset stay Disabled I don't understand why is not good.
My temps are nothing better than yours, but I know that cooler is reason because my voltages are on 1.2V and I keep cooler on Balanced speed to avoid screaming of fans and with Z77 platforms my temps are not nicest. But my temps never pass 75-76C. Because of that I didn't go over 4.2GHz, when I change cooler i expect same temps on 4.4GHz.
Or I could change power option to Balanced and decrease temps rapidly. It's very good in world of Adaptive Voltage. And 0.015V deviation on Adaptive settings is very good compare to other motherboards, in manual deviation is much lower with single digit number.