Steam's FPS Counter If you're launching a game on Steam, even if it's a game you didn't buy on Steam, you can use the launcher's in-game frame rate counter to measure performance.

Notebookcheck.net spotted that Valve has released a new beta of the Steam app where the basic in-game FPS counter has become a full in-game overlay performance monitor.

Steam's In-Game FPS counter is now expanded to become the In-Game Overlay Performance monitor. It can display various more detailed information about frame rates, CPU performance, GPU performance ...

Steam Deck owners have a pretty fantastic built-in performance tracker, and Valve is finally going beyond a mere FPS counter in the Steam desktop client.