Voltage not adding up

[Hiijinx]

Hey all,

Specs: i5 2500k @ 3.3ghz stock
Asrock z68 extreme 7 gen 3

My CPU at stock settings runs at a maximum of 1.200V under intelburn at full load so I figure I have at least another 0.150 to easily keep it under safe volts/temperatures.

The issue I am having though, is even with the smallest increment to my Offset Voltage of +0.005, along with the turbo voltage (which I cannot disable) to the minimum of +0.004, ( = 0.009 fyi) my cpu immediately jumps to 1.336v

LLC is set to 5 (0%) - if I run it at anything else, the voltage spikes up to 1.4's.

It runs fine at 4.4ghz but feel I could lower the voltage some - but can't...

Have tried resetting BIOS settings numerous times and reflashed it to latest version of 2.30.

I have previously OC'ed this and cannot remember having such issues.
Is my maths seriously defective or is this not adding up the way it should.

 

[Hiijinx]

How would this help me lower my voltage?

Level 5 is the lowest I can go at 0%.

 

[Hiijinx]

Just tried your idea and changed it to the smallest negative offset of the same amount, -0.005 and it seems to have brought it down from a max of 1.336 to 1.328.

But from all the Overclocking guides I have read, never have I seen someone needing to LOWER the vcore, why is my board so special ...

Perhaps I should switch to fixed mode to actually get some control on this board.