ASUS motherboards like to set too high CPU voltage. It doesn't mean that you have any hardware issues. Just set CPU voltage manually to 1.3V
Or ignore it. 1.440V will not fry anything and such voltage will not be constant anyway.
I'm not comfortable to play with the voltages
and since I never done that I keep my turbo core off
CPU Vcore with the Turbo Core off the voltages are = min 0.864 V up to 1.260 V
CPU VCore with Turbo Core on the voltages was = min 0.864 V up to 1.440 V
and according to the CPU specification the boosted state should get 1.425V so there is 0.015 extra voltage that shouldn't be there
and btw I don't see any difference in term of gaming performance with the Turbo core on or off
Turbo core is active for low threaded loads.In modern games you really will not see any benefits from Turbo core.
I think you have found a good solution for your situation.