RyzenAdj VS amdctl

Out of curiousity how the 7840HS performs at different TDP, I did some benchmarks using Geekbench 6.2.0. To change the TDP, I've used the software RyzenAdj like so:

TLDR: Ryzen Adj.

A few years ago I did a bunch of poking w/ a 4800H, you can see the actual mechanics of using RyzenAdj. There are also Geekbench 5 benchmarks linked from the doc at different power limits which you can compare to 4800U devices on Geekbench's site: https://github.com/lhl/linuxlaptops/wiki/2020-MECHREVO-Code-...

Note, each laptop manufacturer may choose their different power limits (and like Intel, AMD's curves are largely driven by temperature, so dependent on cooling solution and other settings).

This is a good summary of some of how Ryzen Mobile's power limiting works (actually, read that whole wiki if you're interested in the topic): https://github.com/FlyGoat/RyzenAdj/wiki/Renoir-Tuning-Guide

I'd also look up "AMD PMF" (their equivalent of DPTF) which only recently made it's way to the Linux kernel (but of course, that will include loads of details anyone can look through): https://www.phoronix.com/news/AMD-PMF-CnQF-Linux-6.1

GitHub - FlyGoat/RyzenAdj: Adjust power management settings for Ryzen APUs

Check out https://github.com/FlyGoat/RyzenAdj

If you want to get numbers you can download https://github.com/FlyGoat/RyzenAdj/releases

That app just uses (under the hood) this one https://github.com/FlyGoat/RyzenAdj - g-helper not using that , as it requires admin rights to run :)

Try intel-undervolt or amdctl

I still wondering how to control CPU, found many stuff such as amd_pstate, ryzen_smu, RyzenAdj, amdctl. Now I'm trying to figure something out but it has too many options ☺

There is https://github.com/kevinlekiller/amdctl/ . It does require additional kernel params and possibly modules (idk if msr is loaded on the deck - should check) which would be overwritten by system updates. Maybe somebody has used it before?

Another advantage for AMD I guess. RyzenAdj is super configurable (and scriptable for udev events) and has worked great for me for power curve and temp control, and although I haven't tried it, there appears to be a good tool, amdctl for pretty fine grained voltage and clock control now as well.

After that, you can try more advanced tweaks like undervolting and whatnot.