My game behavior is strange.
Vsync is disabled in game AND in NVIDIA panel and i'm still stuck at 60 fps whenever i am (when it don't trop under 40)
I always feel a slight latency, exactly like vsync was enable.
Other strange thing, perf are EXACTLY the same in 1080p (res i'm currently playing at) than 4k.
Meanwhile 3.3.5 client is perfectly working.
Tested with and without addons.
You can try this but it's most likely not going to fix the problem since it's the default setting:
/console maxfps 0
It sets max FPS to the default value: 200.
If that doesn't fix it and vsync in game is disabled, it's most likely caused by Windows 10. Specifically, by Xbox app that comes with Windows 10 and might have vsync enabled in its settings. There is a similar problem with possible solutions described here: