Game doesn't feel smooth (Microstuttering)

Hi, I have an issue with the latest Black Mesa version.
The game runs at min. 100 to max. 250 FPS, but it doesn’t feel smooth when it’s under 150 FPS.
I have a 75 Hz display, so 150fps should feel butter smooth.

My hardware:
Ryzen 9 3900X
RTX 2070 Super

I think the hardware is sufficient for Black Mesa, it also runs on a SSD.
Did anybody encouter the same bug?

Kind regards, ´

Founded in 2004, became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.