in need of advice

[turbobooster196]

Hello guys, hope sombody can give me some advice
I have a msi gaming pro motherbord with a i5 6600k overclock 4.6ghz 1.310v stable
when i look in my bios i see these names

cpu sa voltage 1.272v auto

cpu io voltage 1.264v auto

but if i whant to put that voltage manual its then its red colord

cpu pll oc voltage/cpu pll sfr voltage/cpu st pll voltage all set on auto but i dont see any where on what voltage its running

and what does it do????