I did some tests with the F-4, quick mission, Free flight, Caucasus. First screenshot is with vsync (60fps) on. Second screenshot with vsync off. With vsync off it basically says all the time "CPU bound (main thread)". However, I get up 80-110 fps in the F4. Turning off "vsync" and "full screen" obviously helped a little bit. But it still randomly drops down to 20,30,40 fps for a couple of seconds and goes back to normal fps. I turned down the setting to standard medium and the random fps drops are still there.
The 8GB VRAM of my RTX 2070Super are almost at max. with 7,5 GB. But that is almost the same with any other module where I have no problems, except for the CH-47.
I checked the cores of my i7 9700. Core no.1 and no.6 at 100% (especially no.6). The rest of the cores are around 40%
My Specs:
MSI MPG Z390 Gaming Pro carbon
Intel i7 9700K (8 cores)
DDR4 32GB
Nvidea RTX 2070 SUPER
M.2 NVME 1TB