What games can actually reach 600 FPS for a 600 Hz monitor?

CS2 and Rocket League are candidates, but don't assume either will stay above 600 FPS throughout a match. Resolution, graphics settings, hardware and what's happening in the game all matter. A result from a quiet scene isn't necessarily representative of a busy one.

Competitive games played at low settings are a better place to look than demanding single-player games. Even then, check benchmarks for your specific setup before buying a monitor around that target.

osu! is another possibility. It can run at very high frame rates, including well beyond 600 FPS on some systems. Minecraft may also reach high numbers, though settings and the scene make a big difference, so neither is a guarantee on every setup.

Check the game's frame rate cap before chasing a hardware upgrade. Some games have limits that prevent them from exceeding 600 FPS, or even reaching it. Also, a huge number in a menu doesn't tell you much about performance during actual gameplay.

Older games can be awkward here too. In GTA Vice City, higher frame rates can affect movement and physics, so uncapping it just to use a fast display can cause problems.

You don't need a locked 600 FPS for a 600 Hz screen to refresh at that rate, but it also can't display 600 distinct game frames per second if the game isn't producing them. Higher refresh can reduce the wait for the next refresh, although the gains get smaller as you go up.

A 60 Hz refresh interval is about 16.7 ms, compared with about 1.67 ms at 600 Hz. That's not the whole input latency figure, though. Rendering, display response and other delays still matter. Whether the difference is worth the price is a separate question.