So, I think I pinned my stuttering down to some sort of Gsync/Freesync issue on my machine. After following the excellent post by @CptLucky8 My 2070 SUPER 4K settings and suggestions - episode 2 I was still having stuttering issues with glass cockpit planes. I’m not sure if it’s because I have a Freesync monitor. My monitor, ViewSonic XG350R-C, 35 Curved Gaming Monitor is supposed to be fully Gsync compatible, but Nvidia CPL tells me that it’s not certified.
What I figured out was that if I disable Gsync completely in Nvidia CPL, I disable Vsync in MSFS, and I enable Adaptive Refresh (1/2 Rate) under Vsync mode in Nvidia CPL, I get really good results. The trick is to make sure that if my monitor refresh rate is set to 100Mhz that I can maintain a constant 50fps in the sim (1/2 rate). If the fps drops below 50, then I start to get stuttering. If I set the refresh rate to 60Mhz in Nvidia CPL, I can easily maintain smoothness because my machine can do 30fps all day long. (Of course the problem with 30fps and 60Mhz is that it’s not as smooth on they eyeball as 50fps and 100Mhz, especially during sharp turns or with TrackIR, but it sure beats stuttering!)
The key is to make sure your FPS is matching your refresh rate or half of it. If it drops below the refresh rate it starts to stutter immediately.
This technique allows me to utilize the planes with the glass cockpits. I haven’t tried the A320 yet, but I was able to get the Baron to work really well. I believe that if I want to use the A320 I will have to limit my refresh rate to 60Hz so I can run the bird at 1/2 rate with 30fps and get no stuttering.
I’m still open to further suggestions. I’m not sure if this will help anyone out there but I hope it does.