Under the tab, click Settings in the Performance section.
If your system's paging file is too small, Windows may fail to provide the "memory" the game requests even if physical RAM is available. Advanced System Settings Performance Settings Advanced tab Virtual Memory and uncheck "Automatically manage paging file size". Custom size cossacks 3 out of memory
The game leaks VRAM, especially with high unit counts. Force it to use system RAM instead. Under the tab, click Settings in the Performance section
In the options menu, set interface scaling to 100%. High scaling (like 150% or 200%) is a known memory hog. Under the tab