64GB RAM doesn't boost FPS—it stops the stutter.

No, not directly. But it might feel like a boost because you stop freezing and dropping frames every time a new asset loads.

Cities: Skylines is mainly a CPU and single-thread bottleneck for simulation speed. Your FPS depends on your GPU and resolution. RAM doesn’t change those numbers. But if you’re running 80+ mods and 5,000 custom assets, 32GB gets crushed. The game starts swapping to disk, and suddenly you get micro-stutters every time you scroll or zoom. Those aren’t FPS drops—they’re pauses.

64GB lets the game hold all those assets in memory. No swapping, no stuttering. It’s a smoother experience, which feels like a performance boost even though the framerate counter stays the same.

Future you will not regret the upgrade, but don’t expect higher numbers on the FPS counter.