I tried building and running a 7950X workstation for some time. I managed to get stable settings in a modified "ECO" mode (i.e. maybe about 10% less performance, but much less power usage).

The problem is, it's a huge effort to get there. You really have to tune PBO curves for each core individually, as they can vary so much between cores.

Now the test itself is mostly automatic with tools like OCCT, but of course you have to change the settings in the BIOS between each test and you cannot use the computer during that time, so there's a huge opportunity cost. I'm talking about weeks, not days.

To cut a long story short, I sold the system and just bought a M4 Max Mac Studio now. Apple Silicon might not have the top performance of AMD or Intel, but it comes with much less headaches and opportunity cost. Which in the end probably equalizes the difference in purchase cost.