[2023] [Windows 10] Black Flickering over map

Right click on eu4.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.

Then go to your your Documents/Paradox Interactive/Europa Universalis IV/ folder and delete the /cache/ and /gfx/ folders.

Edit settings.txt to say:

refreshRate=60
fullScreen=yes
borderless=no

vsync=no

Then in the launcher Game Settings menu, select fullScreen display mode.


IF that doesn't help:
DXDIAG is a program you run from the Windows search box on the task bar. After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.

Please attach here your Documents/Paradox Interactive/Europa Universalis IV/settings.txt and pdx_settings.txt .
From your Documents/Paradox Interactive/Europa Universalis IV/logs/ folder, attach here system.log , error.log .  

You mean it was okay within a given campaign for 15 minutes then started happening while you were playing?

If so it is probably the GPU overheating. What fps do you see in the game now? It should not exceed 60


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  

Those temps are okay - neither of them ever get up near 80c? That surprises me as your symptoms do sound like overheating.

What fps do you see in the game now? It should not exceed 60  

Absolutely it could be, yes. Do you have access to another one you could swap in as a test?