This only applies if you don't have an Intel CPU. The instructions can be found on reddit (link below). The only thing I want to add is that you need to backup your .exe before you screw around with hex-editing it. I'm skipping Cyberpunk 2077 for now so I haven't tried this myself. It just seemed too genre-appropriate to not post.
https://old.reddit.com/r/pcgaming/comments/kbsywg/cyberpunk_2077_used_an_intel_c_compiler_which/
EDIT: Corporate kill-team got the post. Here's a different way (and easier) to do the same thing. https://github.com/yamashi/AmdCyberpunkPatch/releases/tag/v0.1.2 . Don't forget to back-up the stuff it replaces. Also try the game first and then hack it afterwards to see if there are improvements. Hack the planet!
Huh. Nice. I'll have to check tomorrow maybe. My performance hasn't been too terrible, but giving it more cores would certainly help. I just worry it'll be a pain in the ass to keep up to date as they hotfix this.