3570k voltage questions

[Belutak]

hi
i have gigabyte GA-Z77x-D3H mb, i5 3570k, 2x4gb 1600mhz 1.5v ram, hyper 212 evo
i wonder about few things
when i put my voltage on auto and when i oc to 4.5ghz my voltage goes over 1.380v
when i put my voltage on 1.25volts i still can easily oc on 4.5ghz

now, i like more to set my voltage to be on auto since when my processor is not under heavy load voltage drops on 0.8v
when i set it to not be on auto but on 1.25 its always on that much, even when my pc dont do anything and i dont like that

so is there any way to i set my voltage to be on auto but with max possible voltage on 1.25(to never go higher than that)?


also i cant find on entire internet what are this two and on what values should i set them
http://imageshack.us/a/img338/6642/58818307.jpg
turbo power limit and core current limit
thx

 

[Z1NONLY]

Use a negative offset.

It's way down on this page (like the 21'st pic), but there is a screen shot that has the CPU Vcore and right below it, there is a " dynamic Vcore".

http://www.legitreviews.com/article/1841/4/

That's where you need to enter a negative offset. That's where you tell the motherboard to subtract (or add, depending on the + or - sign you choose) the amount you set.

I am running a -0.070v offset with my overclock.