RyzenAdj VS thermal_daemon

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 :)

You can make thermald ignore that protection by using the `--ignore-cpu-id` flag. See thread leading up to: https://github.com/intel/thermal_daemon/issues/268#issuecomm...

I don't use Windows but in Linux, using thermald you can also set your own temperature and power limits which would also effectively limit fan speeds. You can also control EPP/EPB manually...

If you're in the EU and looking for a thin and light with good battery life and need/want unsoldered/up-to 64GB of RAM, I believe that the Slimbook Executive 14/Tuxedo InfinityBook Pro 14 Gen7 might be the best options atm - 99Wh battery, 1.3kg for a 14" 16:10 version. Slimbook has a 16" version as well, although the battery is a bit smaller. These are Alder Lake H but using thermald and tlp I believe you can bring power usage in line w/ P or U chips.

thermald added support for both Alder Lake and Raptor Lake in version 2.5 two months ago, so you can build it for Linux Mint from the build instructions for Ubuntu here: https://github.com/intel/thermal_daemon

thermald settings can also affect battery life/performance a lot.

Similarly, on Intel laptops you can use https://github.com/intel/thermal_daemon to do the same (lower the TripPoint Max Temperature in thermal-conf.xml

For Intel, there's https://github.com/intel/thermal_daemon and actually a whole range of tools/strategies for using RAPL to control power usage that can be manipulated directly, like this: https://community.frame.work/t/thermal-management-on-linux-with-rapl-limits/17416