Undervolt Intel CPU

Is there any method to undervolt CPU?
On ubuntu I use this method and it worked very well for me:

I am a beginner in linux. Maybe someone will tell me why it doesn’t work.

anyone with the tip here?

Follow the arch wiki’s guide for undervolting.
https://wiki.archlinux.org/index.php/Undervolting_CPU
Theres some other Arch articles about undervolting out there too.

I used intel-undervolt found here

Build it from source and follow its instructions and you’ll be on your way.