What does Vcore do?

[noname8365]

I have an i9-14900KF and I set Vcore to 1.3 V in the BIOS and it seems to have the effect of undervolting the CPU (less heat, but less stable) however HWINFO shows that Vcore is constantly at 1.3 V, when if I set it to "Auto" instead, it sometimes goes down to 0.8 V. How do I use these apparent benefits of undervolting without it being at a constant voltage (using more power? seems weird), or does it even matter that it's at a constant voltage? My motherboard is Gigabyte Z790 AORUS ELITE AX.

 

Is it better to apply an offset instead with the Intel Extreme Tuning Utility? Does this affect "Vcore" as a whole or is it some entirely different voltage?

[Kilrah]

Yes, you use an offset, and LLC to skew the offset more on either the low or high end basically.