CV1 User here
Got me a:
i7-6700K @ 4.6ghz
16GB DDR4 ram @ 2400
GTX 980TI
I get stammer even when just on VR-High, let alone ultra. Mostly on/around planets, but some around spaceports, too. Haven't tried much for asteroids, yet.
Considering my system is basically on the bleeding edge, I was hoping I could do better. People talk about running Ultra in here... but that would just be stammer city for me. I'm not sure what's different between my system and theirs'
As a test try disabling hyperthreading. I had problems with hitching with my i7 in the latest build. Disabled hyperthreading and it went away.