I never had to put extra IOH VCore 1.1v past its default or ICH VCore 1.05v past its default and I did benching up to 5.2ghz. I think those are unnecessary volts to be adjusting.
Maybe this will help you out but this is what I was using at 5.153ghz in SuperPi32m under DICE. Just comparison sakes.
I actually started using less vcore in the end. I wanna say around 1.45-1.48v.