Undervolting - manual vcore vs offset

bagel

bagel

bagel

Associate
Joined
27 Apr 2020
Posts
352
Hello,

I'm new to undervolting and have just been playing around with it on my 8700k. I have managed to get lowest temps and vcore under load while using a manual vcore, whereas trying to replicate this with offset I am unable to boot (presumably idle voltages shifted too low by offset?).

I can get similar temps with a less aggressive offset but I do get higher vcore spikes (1.25ish Vs a 1.12 manual vcore). My question is: is it better for the CPU to have lower load vcore (manual) but it not being able to drop at idle speeds, or higher load vcore (using offset) while dropping to low vcores (~0.6) at idle?

My gigabyte motherboard unfortunately doesn't seem to have the adaptive vcore option where only the load vcore is offset so I don't think I can have the best of both here

Many thanks!
 
What motherboard do you have?

Try the less aggressive offset and adjust your LLC to address the voltage overshoot. In short, Load Line Calibration can be used to keep your voltage in check. It's options are usually levels 1 through 10. You increase it to prevent voltage droop (voltage dropping) and decrease it to prevent voltage overshoot (voltage spiking). You have to find the balance.

Personally, I have LLC at 6 with a -35mv offset to address the voltage overshoot I have with setting my LLC quite high. Without LLC at 6, like you, I lose stability when my CPU idles. Ultimately, though, everyone's hardware will behave differently, even if the specs are identical, which is why you need to figure it out through trial and error.
 
It's a Gigabyte Z370XP SLI.

I'll have to give that a go as I just left LLC at the default Auto setting not wanting to mess with it! Been using a manual vcore at the moment and it's all been fine, idle power draw's pretty much the same as with offset
 
You must log in or register to reply here.
Back
Top Bottom