[2023] PC freezes randomly

Right click on ck3.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.
Then in the launcher Game Settings menu, select fullScreen display mode, Vsync off, cap refresh rate at 60.


If those don't help:
Please attach here your Documents/Paradox Interactive/CK3/pdx_settings.txt .
From your Documents/Paradox Interactive/CK3/logs/ folder, attach here system.log , error.log , exceptions.log  

Did you cap the framerate too 60 as I suggested? Because that settings file says not!

Once you've done that, what fps do you see in the game before it crashes?


Please report the temperatures of your CPU and video (GPU)
1/ before starting the game up and
2/ after say 10 minutes' play.
If your PC's vendor has given you no way of reading temperatures, install
SPEEDFAN http://www.almico.com/sfdownload.php  

That is definitely an overheating problem then! The GPU should never be overheating at a modest 60hz/fps


Clean out all air vents it has (compressed air cans are good for this). Make sure airflow to them is not blocked by anything like walls, books or whatever.
If that doesn't drop the temps enough, you probably have a faulty fan or a heatsink/thermal paste problem. You may need professional help at that point.  

Well, as I say the card should never get to those temperatures at a modest 60fps, there is a problem there - I am sure of it.

If it has always been that hot then it's always been a problem! The sustained high temps may have physically damaged the card in fact. Does it or did it ever get much higher, say over 90c or more?