how accurate is the 99% fps in nvidia performance overlay?

[Corona Scurrae]

I get varying results despite my hardware being more than capable:
- when set to 60fps it's always hovering at 40-50.
- when set to 175fps it's always hovering at 120-160.
- when set to 240fps it's hovering at 210-230.

[Corona Scurrae]

Originally posted by smallcat:

i think it s due to V-Sync .

I don't play games with vsync unless it's garbage tier software like elden ring

[A&A]

I don't understand, why you have to use "99% FPS", but ok?

[Illusion of Progress]

Originally posted by rocket:

I get varying results...

This is expected. Performance isn't constant, because the level of load on hardware (by the software) isn't constant. It varies as it shifts around. Ergo, performance will too.

Having "more than capable" hardware doesn't change this law of physics. There's nothing special about "fast" or "high end" hardware that allows it to do so. Those are merely arbitrary labels. The best you can do is get hardware so overkill in all areas, and cap your performance, and then always have the ability to perform above that cap. And that's a tall ask more often than people realize.

I'm guessing the "99%" refers to the 99% average. Given it was a bit below your maximum at a 60 FPS limit, the results above that track and are expected. Keep in mind a shift to a loading screen might cause the frame rate tracking to count a very low number, or a brief heavy moment on the CPU resulting in the stutter may do the same. Those results don't sound too surprising.

[Corona Scurrae]

Originally posted by smallcat:

99 FPS - It means that almost 99% of your frames are above an FPS threshold,

it seems to be an nvidia driver related issue and it seems there is no solution for it except for increasing the fps