Understanding Undervolting MSi Board

[natsukirei]

Hey Team

 

So basically with my old ryz 5 2600 i could just go into bios, set a vcore, all done and all good, with the 3600 ive had weird behavior, my mobo is an MSi B450 Carbon, so i set the vcore to 0.980 which works fine at x36/3600 core boost off and PBO off, 3600 is enough for what i do day to day and temps are nice, i also set my NB to the same, as i read that the NB Voltage needs to match or be lower.

 

It worked, HWInfo64 read it all good.

 

Then i tried a 4Ghz undervolt at 1.1/1.2 with the same settings with VCore and NB, and that worked, but it was just for fun so after i redid my 3600Mhz settings.

 

Now HWInfo keeps reading 1.085 to 1.1 Volts on the Core VID, but before it was 0.980 till i did the 4Ghz change.

 

I am so confused and trying to understand how undervolting works and what settings should be changed when looking at NB Cores, and VCore volts, i want to understand how NB Volts effect VCore and override vs offset, basically i want to achieve lower than 0.980 volts at 3600 which should be perfectly possible and the changes to reflect in HWInfo64 so i know its worked.

 

 

[boggy77]

 

[Jurrunio]

From my understanding, undervolting to the point which causes VID to rise is already too much. It engages clock stretching at that point which makes the performance-equivalent frequency lower than the reported frequency.

 

And VID is not voltage pumped into the CPU, woth Hwinfo64 it should be Core Voltage SVI2