I’m running a 3090, 10850k and 32 GB of ram.
Since the latest Nvidia driver I’ve found that I don’t need OTT at all and just uninstalled it.
I don’t see any point setting supersampling in OTT, just set your render resolution on the Quest 2 app to the maximun, that’s 5408 x 2736. That’s the actual native render resolution of the Quest 2 corrected for barrel distortion. Then try and get as high as possibly in game render in MSFS. I currently use 80, for a 3070 you might need to use 70 Hz
Regarding refresh rate 72HZ if fine for Flight Simulator and in fact if you’re using Oculus link Version 27 it’s forced at 72HZ regardless of what refresh rate you use. Even if you’re running 80Hz in version 27 you’re still only getting 72HZ.
You want to ensure your encode bitrate in the Oculus Debug Tool is set to at least 350 to eliminate compression artifacts, I use 450 but I’m not sure it makes any visual difference above 350 to be honest.
I’ve noticed that disabling full screen optimizations improves my frame rate. I have GPU Enbabled Scheduling (HAGS) set to ON for the latest Nvidia driver 465.89 as that is what NVidia themselves recommend saying that turning it off can lead to microstutter in VR. Note that is specific to this driver only, most people report better performance with HAGS off with other drives.
In game settings I personally disable ambient occlusion as it offers little visual gain for a fairly sizeable FPS hit, I also keep shadows maps on low, I think 1024 and 256.
My system is running pretty much perfectly smoothly now after having a jittery cockpit for months up to this current Nvidia driver.
Clarity in the cockpit is excellent with 5408 x 2736 and a render resolution of 80, I can read all dials and even the safety warnings in the cockpit very clearly. You might need to drop to 70 on a 3070, but it still looks pretty decent there too.