16GB to 32GB won't noticeably improve gaming FPS.

Not really.

Upgrading from 2x8GB to 2x16GB DDR4-3200—doubling your total from 16 to 32GB—won’t give you a meaningful FPS boost in almost any game today. The vast majority of games use 12-16GB at most. Going beyond that only matters if you’re running a bunch of background apps, streaming, or playing heavily modded titles like Cities: Skylines or Microsoft Flight Simulator (and even then, the gains are small). Since your RAM speed stays the same (3200MHz), there’s no performance delta from that side either.

The real question: Are