What is your VCore?
That GB mobo will over-volt a ton with settings on *Auto*
I've down-volted as much as -0.125v, unlocked, and OC'ed on a rig similar to yours
Edit: Here yah go ....
At idle ... 0.832v 2400MHz IMC/NB (minus 0.125v in the BIOS)
Unlocked, at load ... 1.18v 2400MHz IMC/NB (minus 0.125v in the BIOS)
Power at the wall dropped by nearly 1/3 ... to something like 135w at load!