I installed a shader for Minecraft for the first time and I wanted to check how my computer was handling it, so I opened up NVIDIA’s Performance Overlay to see. It showed the FPS as a stable 59-60, but below it, something called “99% FPS” was swaying between 46 and 51. What does this mean, how does it differ from regular FPS?
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It’s one type of “minimum FPS” number, because the game does not always run at the exact same framerate.
The absolute minimum FPS can actually be extremely low if you include brief glitches while textures are loading, etc. So to get a practical, useful “minimum” they give a number that the game runs at 99% of the time. It could be slower than this 0.5% of the time, and it would not drag this number down.
You can also measure 99.9% FPS, which will tell you the slowest the game runs 0.1% of the time, or you could even record the slowest FPS the game ever runs at any point. But 99% FPS is seen as a reasonable measure of “minimum” performance most of the time.
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