Game gets unresponsive after playing for 10 to 30 minutes

[yandexx]

After a suggestion from NVIDIA support, I tried the game on the lowest settings.
I left the game idle for 30 minutes, then ran around a level for 15 more, there were no issues.

I now think that hangs and crashes happen when the card runs out of VRAM and starts swapping to system memory. I only have 1 GB, and thanks to Process Explorer I can see that on the lowest the game needed around 500 MB, on Medium it fits right under 1 GB and on High it also additionally consumes 300+ MB of system memory. At that point the game starts to stutter often, especially when quickly turning the camera.

Changing to Medium textures/shadows is probably the workaround for me, but I have to test this further. It is also probably a good idea to close apps that consume VRAM: Chrome, GOG Galaxy (again, you can check via Process Explorer).

This still leaves the question whether the game is at fault or the drivers. Hoping NVIDIA will be able to tell, investigation still ongoing.