Stations and planets are the most demanding areas in ED.
You should reduce the “Terrain” settings. Lower Terrain Work to the lowest setting and set the others to Low. If you get a good frame rate, try increasing some of them to Medium or even maybe even High. One of those settings (Sampler Quality ???) is the anisotropic filtering, so make sure you are not overriding it in the nVidia control panel app. Also verify that you are not forcing Antialiasing on, since that won’t improve your ED experience. (ED uses “deferred rendering” which means it cannot use AA, but I think it tries to, which might reduce your framerate.)
For quick testing, land and get in your SRV. Use FpsVR to get a consistent framerate reference. Stay in the SRV until you’ve found acceptable settings, so that you can quickly change the in-game graphics settings and test them.
Note: Some settings don’t take effect until you re-enter a system. (I’m not sure which ones.) If the framerate doesn’t increase, exit to the main menu (no need to exit the game).