Ok, so I finally tracked down settings which give me a smooth experience for now (not trying belts or planets until I get AMD support of the Async reprojection) but something odd seems to happen with some menus. I can fly into and around stations with seemingly no judder or freezing, but then I dock and open starport menus and everything seems to go rapidly downhill. For extra oddness, I can close the menus and the judder persists until I "launch" and then things become smooth again. Are menus causing this or is it purely coincidental?