As you can see in these two screenshots, I found that the menu causes my GPU to run at 99% utilisation every time I press the Esc button and open it. This includes the initial escape menu and the settings menu, as far as my testing has gone. My average gameplay utilisation can be seen here as around 70%. It's now much lower actually, 55% - 60% average after I adjusted graphics settings. But the menu still maxes out the GPU every time. The temps of course seem to increase a lot too and the fans start spinning louder which I suppose backs up the evidence a bit. Would it be normal when opening the menu to reduce GPU utilisation a lot, rather than increase it?
The main menu, when the game is started, runs better at around 45% utilisation for me.
I have submitted a report in case it might help.
I have both the game and my GPU limited to 60fps. I run everything in 4k and use an RTX 3080.
Hopefully we can sort it out somehow Thanks in advance for any help you can offer.