[amq]

The latest mobile amd zen 4 has a comparable efficiency* to apple m2 despite not being arm or having hybrid architecture. See 7840U.

* Within up to 15% at 25W.

[aurareturn]

This is not true.

Maybe in light threads that utilize many cores.

Most reviewers base it on Cinebench which is a poor indication of CPU performance for anything except Cinemark. Cinebench uses Intel Embree Engine which is hand optimized for x86. In addition, Cinebench favors CPUs with many slow cores - which is not how most software will perform. This is why AMD heavily marketed Cinebench for Zen1 launch and why Intel heavily markets it now for Alder Lake/Raptor Lake. In fact, Intel's little cores are basically designed to win at Cinebench.

Furthermore, AMD CPUs will rate at 25w but can easily boost up to 40w+ watts. It's up to the laptop maker.

[amq]

You can easily limit the power to 25W. Most manufacturers typically have a silent mode which does exactly that.

Not sure what you mean by many slow cores, since mobile zen 4 has a better single-core performance than m2 pro.

[aurareturn]

Zen4 desktop has - at the expense of much higher power consumption.

Zen4 mobile does not have higher ST performance than M2 series.

https://browser.geekbench.com/processors/amd-ryzen-7-pro-784...

https://browser.geekbench.com/macs/mac-mini-2023-12c-cpu

7840u's ST is slower by 21% while consuming much more power during the test.