Sorry but the Q2 refresh rate you choose definitely effects GPU usage and hence overall performance. You can look at your win10 task manager GPU usage to confirm this. Try 120Hz and youāll def see the difference, lol! I know that many think that with flight sims that cannot maintain full refresh rate fps that this should not matter, but it does imho.
With my Q2/rtx3090 (mainly using Air Link) Iāve found the sweet spot for me is 80Hz and the res slider full right (native Q2 res) and Air Link dashboard setting at 200mbps dynamic. All my ODT settings at default/zeros except ASW disabled, Encoding width = 3664 (1:1 scaling), and link sharpening enabled.
I have never found ASW or frame limiting options to be very useful. Too many artifacts and I see very little difference in how smooth things look. I also do not see any advantages to adding super sampling (StreamVR visuals manual 100% and disable SS filtering btw) because once you have the Q2 res slider full right, link sharpening enabled, and encoding with at 3664 there are not any significant improvements after that. I think it looks fantastic!
Nvidia (currently using 496.76) control panel settings all default except the power option set to prefer max performance. Mucking around with these further does not improve PCVR performance imho. Iām also on the latest win10 feature/security updates. No big win10 settings changes except the usual disable any usb power savings options.
Also, together with my VR Cover standard facial interface, their eyeglass spacer, their thin Cool pad, and Oculus Elite strap with battery Iāve found my Q2 to be much more comfortable, with a larger fov, than stock. Of course Iād like a larger FOV but I can easily live with this for now. I just need to move my heads around a little more, lol!
While some may be more refresh rate sensitive than others, I donāt seem to be. I cannot tell the difference between 80/90Hz but I do see minor improvements with faster racing sims compared to 72Hz. So, Iāve settled on 80Hz for everything and this seems to work fine with all my games/sims, including fast action ones. The Rift S uses 80Hz and I did not have any problem with that as well. Nor did most users that I know.
I also have a good Link cable (VR Cover 5m Premium Link Cable) connected to my z390 mb usb3.1 gen2 type c port and this also works very well. I use the same settings but increase the ODT bitrate to 500mbps. This does improve the clarity of distant objects but Iāve found that the freedom of wireless outweighs this, for me anyway.
The point Iād like to make is that itās important to get your base Q2 setting optimised before finetuning in-game settings. For those, youāre on your own, lol!