I have never OC'd or undervolted before, but I'd like to try it as my GPU can reach ~75c as well as being noisy (would be good to get advice for the fan curve, as well as knowing what the optimal/max temps are).
Games I play: Cyberpunk, E33, KCD2 at 4k, usually using FSR upscaling. I'd like to get some more performance if possible, but not at the expense of longevity. The main aim is a quieter system.
https://www.techpowerup.com/gpu-specs/gigabyte-rx-6800-gaming-oc.b8243