Go to > Advanced > Performance Settings > Advanced > Virtual Memory .

The most impactful change. Patch 1.2.0 silently replaced the old 32-bit executable with a native 64-bit .exe . This allowed the game to access >4GB of RAM. Suddenly, Cossacks 3 could safely consume 10GB or 12GB without crashing.

In a standard 1v1 skirmish with 1,000 population per player, the game engine would attempt to allocate memory for:

: Using dgVoodoo2 to wrap the game's graphics can help bypass certain driver-level memory leaks. 4. Advanced: Registry & 4GB Patching For those comfortable with deeper tweaks: