Hi again,
I made a guide on undervolting Intel Arc B-Series cards. You can save some watts and get higher, more stable 1% lows and 0.1% lows. It's very simple and doesn't require any extra software.
You should give it a try and see for yourself. Intel changed a few things in their software, so guides that are a few months old are outdated, and I hope there won't be any major changes forcing me to re-do this once again. The methodology should also help you understand overclocking.
Take a look. If you have any questions I'll try to help you:
https://www.techpowerup.com/forums/threads/guide-plain-and-simple-intel-arc-b500-series-undervolting-method-by-lame.353763/