When I upgraded my PC in June I was mostly playing new games.
I do play a lot of older games now though, as my backlog has grown to around 50 games in the Steam library alone, and I want to finish them before I start buying new games. But I also try to play at least one modern game a week, so it's still hard to say how often my GPU is maxed out.
I'm currently playing Darksiders. On my old GTX1080 I would probably still be playing this game at 1440p because I did not have DLSDRx2.25 functionality and DSRx4 was too much for the GTX1080. At 1440p (lets call it GTX1080 settings) my GPU draws in this game around 46W, while the whole PC 167W.
At 4K downscaled to my monitor's native resolution of 1440p, my RTX4080S draws around 101W. The whole PC case draws 218W (7800X3D, 32GB GDDR5 6000MHz, 5x ARGB fans, NVMe, 2x HDD, PCIe soundcard, M+K).
I had RDR1 on the PS3 but I have never played it more than one hour, so I want to finally complete it now. At 4K 144fps (engine limit) GPU power draw is around 220W (347W for the whole PC)
At 1440p 60fps (settings that I would use on my old PC) GPU consumes 65W (172W for the whole PC).
But when playing modern games, I often see GPU power consumption of 300W at 4K with uncaped framerate.
RDR2 isnt exactly new, but even this game at 4K use nearly 300W GPU power (430W for the whole PC).
At 1440p with 60fps cap the game consumes around 95W GPU power and 218W for the whole PC. My old GTX1080 would not even run this game at 60fps at 1440p with maxed out settings.
I followed this UV guide. I saw a 50-60W reduction in GPU power, so I think UV worked. Only in certain games (Metro Exodus) my GPU power draw was the same (300-315W) despite UV. For some strange reason this game just ignores UV settings and pull the max amount of power. I saw the same behavior on youtube videos, so I dont think my UV settings are to blame.
I expected to see the same performance (after all the GPU clock was the same) but it wasnt and I saw 3-5fps reduction. I don't know why, maybe the GPU has internally reduced the performance of some of its components.
I have also UV'd my CPU and have not noticed any performance degradation, in fact my 7800X3D is even faster because it can maintain max boost clock for longer.
As for the Cyberpunk, here are my built-in benchmark results. I tried to match your settings but IDK what exact preset you used (Ultra or high, maybe even modified?)
Ultra preset
High preset