Hey guys, so I'm considering going from a heavy performance build where I have a Ryzen 3800X and RTX 3080 TI, both water cooled, currently at stock clock on GPU and overclocked on CPU.

I live in Florida, and so as extension, my room sits on the surface of the sun.

I'd like to tune back the already overkill 3080 TI, as well as the CPU, in hopes of getting a real nice drop in temps (primary target) and power draw (secondary target). My goal is the temps, but I expect a lower power draw as a result.

Whenever I hear about reducing temps, you always hear "undervolt your chips" but I recently read that it just gets turned into more boost headroom, which in turn sounds like it still creates the same heat because there's more room to boost.

Q: Can someone confirm if its one or the other (undervolt or underclock), or if doing both is key for the thermal improvements?
As a bonus question if anyone has any experience researching this, I'm considering maybe upgrading CPU eventually. I've been looking at the 5800X3D, 5900X, and 5950X as options for an upgrade, and I figure the more powerful chips may have plenty of room for significant temp reduction.
Q: Of those, are any of them particularly better for an efficiency build than the 3800X or should I save my time?

If anyone could provide any experience on that, or bonus points for citing any good material that directly covers both undervolting and underclocking, I would immensely appreciate it! Help me return to Earth guys; the sun is really, really hot.