I believe I read that programs that monitor frame rates etc. (like afterburner?) can cause stuttering in VR. I have about the same setup and using this:
Nvidia driver 457.30 (game experience NOT installed)
OpenXR preview mode enabled.
OpenXR render scale: 70
OpenXR Motion reprojection: disabled
FS2020 render scale: 100
WMR: best visual quality, dispalay resolution best quality
Win10: game mode off
Those I think are the most important settings. You can check the ‘best bang for your buck’ guide from cpt lucky to see which FS2020 settings affect performance, set them to low and then you can increase quality until fps drop too much.
Not familiar with Index settings as I have a G2.
And it is true that it is very frustrating to get this game running ok. There are bugs in the game, WMR, Win10, Nvidia drivers, OpenXR and it annoys the hell out of me because you spend a lot of tweaking an updating all the time and not a whole lot of flying until you get it to work for a little while.
Good luck!
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