I have the 7950x, and if I set it to 65W eco mode, I still have basically the same geekbench score

65W: https://browser.geekbench.com/v6/cpu/6126001

105W: https://browser.geekbench.com/v6/cpu/5821065

I actually haven't tested it with 170W (which is the default for the 7950x) for whatever reason, but the average 7950x score on geekbench is basically the same as my geekbench scores with lower than normal TDP.

https://browser.geekbench.com/processors/amd-ryzen-9-7950x

I wouldn't be surprised if the same is possible with the newer CPUs.

Nice added bonus is that my PC fans barely spin (not at audible speeds)