[2021] CK3 - Constant Crash to Restart

You were right to check the temperatures as those symptoms sound exactly like overheating. Neither GPU nor CPU ever get to 80c or more?

The dxdiag shows several bluescreens, are you seeing those yourself? If so what text is on the screen before it restarts?

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  

EUROPON said: Look this the error that i can show to you, about radar_pre_leak_64

That is not a significant error, almost any app can trigger that. Octoparse.exe gets it too in that dxdiag.

Please answer the questions I asked above, and provide those files here, thanks.  

Nothing of any use in those files unfortunately.

When you get the bluescreen - BSoD - there will be some text on it, like MACHINE CHECK EXCEPTION or other such error - what does it say?

You can also look into them in the Windows Event Viewer, any useful text for them there?