[2021] performance past mid 2300

There is no multi-thread debate - it is there and it works But there will always be one CPU/core that carries the main load, not all processes can be usefully shared between cores.

What if you use Affinity in Task Manager to prevent the game running on CPU8 - any different?

Also, in Windows run msconfig. Go into boot-advanced; if number of processors is ticked there, untick it and reboot.


If none of that helps; did reducing galaxy size not help the performance at all? Or some but not enough?

And in what way does the lag manifest itself? Slow time passing, jerkiness in zooming or scrolling, long load times for save games? All of those?


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/Stellaris/settings.txt and pdx_settings.txt .
From your Documents/Paradox Interactive/Stellaris/logs/ folder, attach here system.log , error.log .  

There are a lot of errors in that log, including mod errors. You are testing this with galaxies that have never had any mods used in them, is that right?

Please try this:

- move any valued save games elsewhere, and user_empire_designs.txt from /Documents/Paradox Interactive/Stellaris/ if you have made any custom empires or races.
- "uninstall" in Steam-Stellaris
- manually delete both the Steam/SteamApps/common/Stellaris AND Documents/Paradox Interactive/Stellaris folders
In particular you need to make sure there are no files or folders left under either the Steam Stellaris or Documents Stellaris locations, before installing again.
- re-install game in Steam, run a Steam Verify when done.
- add stellaris.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.
- right click on stellaris.exe, properties, compatibility. Tick "disable fullScreen optimisations", and untick everything else in that screen. Apply and exit
- start the launcher, and select the fullScreen display mode
- now start the game with no mods active and test with a new galaxy, NOT any existing one.

Is that any better? If not, in the launcher go back to borderless display mode, turn Vsync off and set the refreshRate cap to 60. Is that any better?