AMD Ryzen 7 7840U Performance Benchmarks on Linux

• RyzenAdj

  113 1,507 7.1 C

  Adjust power management settings for Ryzen APUs

For those interested in seeing more about how these new 7040 APUs (Zen4 + RDNA3 "Phoenix") perform, Notebookcheck just reviewed a 7840HS (65W max TDP I believe) minipc: https://www.notebookcheck.net/AMD-Ryzen-7-7840HS-performance...

Although not Linux specific, the nice thing about Notebookcheck is they have a nice database of other CPUs/devices that you can easily compare against. ServeTheHome has been reviewing a lot of these minipcs as well, here's their review of another one w/ Linux compile times and a few other Linux benchmarks: https://www.servethehome.com/minisforum-um790-pro-review-big...

For those that don't know, the U, HS, and H chips are basically the same chip with slightly different bins and usually can have their TDP modified in BIOS, via Ryzen Master, or third party tools like RyzenAdj (Phoenix support: https://github.com/FlyGoat/RyzenAdj/pull/256) to perform pretty closely. (This generation the HX is a '7045' chip is closer to a desktop chip than a mobile APU)

• linuxlaptops

  17 39 2.5 ASL

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

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

Suggest a related project