I’m familiar with that post, in fact I’ve bookmarked it and tried some of your suggestions, but haven’t had any measurable increases in framerates. I am not running 4K though, “just” 1440p. I haven’t done everything the same as you, though, probably most notably I have several things set on Ultra, and I have Texture Supersampling set at 8x8. I know that’s a pretty hefty performance cost, but I find it absolutely necessary for runway and airport environment textures in general, so I’m willing to make that sacrifice.
One thing I WISH I could crank to Ultra is volumetric clouds, but it’s just too much of a frame killer.
I’m getting similar performance than you, except when flying the Carenado Mooney (which I do almost exclusively since I bought it), which is costing me 10-12 fps over anything else I’ve tried, including the Baron. But that’s a Carenado issue.
I could have gone 4K for not much more than what I spent on the 2070S and monitor, but I would have had to sacrifice size and specs on the monitor end, which I wasn’t willing to do. (I’ve got a Samsung C32HG70.)
I’m also not convinced the averageish person viewing an averageish sized monitor at averageish viewing distances can actually see much of a difference between 1440p and 2160p, though the difference between 1080 and 1440 was stunning.
I actually tried running the sim on my 1440 monitor at 1080, it killed the visuals but didn’t make a lick of difference in the framerates.
I’m not sure if I gave you a good answer, it’s late and I think I rambled quite a bit, but feel free to ping me again if you have more questions.