32GB helps with stuttering, not raw FPS.

Yes for Cities: Skylines. Maybe for Flight Simulator.

Simulation games don’t work like shooters. They don’t care about your GPU as much as they care about how much stuff the CPU has to juggle. More RAM means the game doesn’t have to dump assets to your hard drive mid-game. That’s the stutter you feel when you zoom in on your traffic nightmare, or when your plane descends on a custom scenery.

Cities: Skylines is especially greedy. A big city with mods and custom assets easily eats 20GB+. 16GB will either crash or turn into a slideshow when you pan around. MSFS is better optimized but add-ons and high settings push it past 16GB often—so you’re trading a smooth descent for a stuttery mess.

You won’t get +20 FPS from the extra RAM. But the FPS you do have will feel more consistent and the “jump to desktop because the game froze” moments will go away.

If your motherboard supports it, used 32GB sticks are cheap enough that this is a no-brainer upgrade. Your simulation will thank you.