I use a Rift S. I did the VR beta testing with an RTX 2060 Super, which I’m pretty sure has significantly less performance than the RTX 1080ti. I have since upgraded to an RTX 3090 (still using the Rift S).
We all know that the RTX 3090 makes no sense from a financial standpoint. I wanted to buy myself an expensive Christmas present of an RTX 3080, but I also started watching for 3090s since the 3080s were so hard to find. A 3090 ended up becoming available first, so that’s what I got – a REALLY expensive Christmas present.
I got the 3090 not to drive my Rift S but to maybe give me a better chance of driving a Reverb G2 or other similar higher resolution VR headset in the future. I also did it for my sim racing. By the time I ordered the 3090, I already knew that MSFS 2020 has a lot of FPS challenges that have little if nothing to do with the GPU.
I am glad I didn’t get the 3090 expecting that it would solve all my issues. I knew that the Rift S can only get to a certain level of clarity, no matter how much I supersample. For sim racing, this has always been “OK”, but not perfect. I don’t need to see gauges much in sim racing, but I do need to be able to spot the apex of the next corner. In MSFS 2020, I need to see gauges and I struggle to see them in VR.
Once we establish that the RTX 3090 makes no sense from a financial standpoint, no matter what, then it is easy to see that it is not worth upgrading for the benefit it gives you in MSFS 2020 (especially over your current card). An RTX 3080 makes a lot more financial sense, but buying it just for MSFS 2020 right now and expecting significantly better performance may be a disappointment. If the sim is being CPU limited or data limited or mystery glitch limited then the GPU is not going to help.
In my case, I learned that I don’t need much more than 30 FPS (40 is nice to reach in the Rift S, so that ASW can kick in, but I have NEVER gotten that in the A320, even with the RTX 3090). When flying the small GA planes I like to fly, I do find that the RTX 3090 allows me to run the render scale in the game up to 130% or 140%, which does make things in the cockpit more clear. But, as I said, it can only get so clear with the number of pixels available.
The A320 has been a challenge for me in VR. I also have FPS in the 20’s at times.
If you’re patient (like I’m clearly NOT since I bought an RTX 3090 and have a G2 on pre-order at the moment), I think you should tune the best you can with your current system (which is a VERY capable system) and wait for the dust to settle a bit.
Be aware that if you’re using Steam VR, it sets SS to 150%(?) by default, even if the slider shows 100%. You have to set it to custom and set it to 100%. From what I’ve heard, the SS outside the game has less effect on the cockpit visuals, while the render scaling in the game has less effect on the far visuals. I try to run my render scaling in the game at 120%, to try to get as clear cockpit visuals as I can with a decent FPS but, as I said, it’s all a challenge in the A320 compared to GA planes (and the B747 is a HUGE challenge compared even to the A320!).
Also, one thing to try in the Oculus Debug Tool is to set ASW to “disabled”. Although ASW should make things smoother, I found that it can lead to artifacts and also lower the FPS more than it should. Note that this setting is not “sticky”. You have to set it to “disabled” every time you start the game and are going into VR. I have found that even if it says “disabled” that I sometimes need to go in and set it to “auto” and then back to “disabled” to get it to take effect.
Good luck and, most of all, have fun!