Sorry for bad english.
My fps is anyway 53-67 tough i use v-sync. I tried also with v-sync + fps cap, and only fps cap. Without these fps is anyway same. And it's not stable, it's changing all the time from 53 to 67 and back. I tried also with low and ultra grapich quality, but that didn't effect to fps.
My computer specs: Windows 10 64-bit, 8GB ram, Intel core i5-7400, Geforce GTX 1070.
I think ram doesn't matter because i can also stream this game very well and streaming didn't effect to fps. This problem appears also without streamin. Changing window mode didn't work. And yes, i'm using newest windows version and right resolution.
I'm also using Geforce experience's optimized settings.