The last 20% of the performance takes like >75% of the power with Zen 4 systems XD.

A Ryzen 9 7945HX mini pc I have achieves like ~80% of the all-core performance at 55W of my Ryzen 9 7950X desktop, which uses 225W for the CPU (admittedly, the defaults).

I think limiting the desktop CPU to 105W only dropped the performance by 10%. I haven't done that test in awhile because I was having some stability problems I couldn't be bothered to diagnose.