FPS Locked to 255 in every Game

Jul 17, 2018
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Hey,
I was streaming for some friends yesterday and realised that i couldn't get over 255 fps in any game.
I tried fixing it through NVIDIA and the specific game config files (even tho its in all games. So that would have suprised me).
I also searched a lot on the internet. But the only threads i found were about vsync and 60 fps locks.

I know. Why would I need more then 255 fps if my Monitor is a 165 Hz Monitor?
I just want to get the "problem" out of the way.

My Pc:

i7-8700k @4.9 GHz
gtx 1080Ti
16Gb Ram