This article explains how to get 120 frames per second, which you’ll also see as “FPS” or “Hz,” on PS5. Not every game on PS5 supports this option, so while you can prepare your console for it, it won’t work for every title.
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Most games that support 120 FPS also have other graphics modes that run at different frame rates, such as 30 FPS and 60 FPS. Check your in-game settings for a 120 FPS toggle or a "Performance Mode" you can enable.
The exact settings you need to adjust and where they are located will vary from game to game, but you can usually find what you're looking for in the "Video" or "Graphics" section of Settings or Options.
Turn on your PS5 and open Settings from the main menu.