A very difficult hypothetical!
A very difficult hypothetical!
30 with the idea that the variation is fast enough to cause a stutter. If there isn't an actual stutter, then the variation is acceptable.
It varies by game. Some lack smoothing features, making even moderate instability noticeable. I adjusted Tomb Raider’s settings to a fixed 30 FPS for smoother performance, avoiding jarring jumps. In Shadow of Mordor, I didn’t lock it in because the game handled instability well. The experience felt natural without sudden frame changes. The underlying code probably managed it effectively, but personally it didn’t disrupt immersion.
I prefer playing at a stable 30 rather than using FPS everywhere.