I am running a 9700 KF with a 2070 Super GPU. I have 32 GB of ram.
MSFS is set to high on almost all settings and ultimate on the rest.
I run my sim at my native monitor resolution 3840x2160
I run in full screen mode
I have never seen these issues from day one
My system is not overclocked in any way.
I run 40 to 60 fps smooth depending on the weather and how many clouds there are or aren't, however I only check the fps when I am going to post something like this.
I only care about smooth.
Check that Hardware Accelerated GPU Scheduling is turned ON in Windows.
Early on in MSFS, many recommended turning this off for the exact reasons that are laid out in this thread.
Nvidia's latest drivers (maybe a few versions before, didnt pay attention) explicitly say this should be turned ON for best performance, especially if you have a later gen card