Yeah I’ve hit 90 too, but only in certain circumstances. In this case I believe it is because he’s at high altitude over scenery that is mainly water.
Unfortunately it doesn’t last when you go closer to the ground, which is when 90fps would matter most, at least not in my case
Is there a way to limit fps to 45 in VR mode but not in 2D? I sometimes fly airliners on a monitor and don’t want to change this setting every time I play MSFS.
You can easily do this on the fly with Rivatuner, it’s like 3 clicks to switch from 45 to whatever, without restarting anything
OMG Rivatuner is huge. Credit to my brother and his IT drive… He read up on all things Rivatuner and got the 4090 5800X3D at 45 FPS with DLSS performance and 140% on OpenXR tools for WMR, and few other tweaks in usercfg.opt file to run flawlessly. Much of it related to efficient calculations of scale and native resolution and hz of the Reverb G2. We Flew all of the UK, Ireland and northern scandinavia at 150ft above the deck at 350kts without more than a dozen stutters, micro scenery loading, hickups. I can’t say enough about the frametime being so critical. All the Youtubers have got it wrong! It’s only really about frametime and targets for simplified scaling. Sadly though, DLSS is critical in that effort and sharpness is not as good as TAA but it’s close and the immersion without any stutter trumps the sharpness of TAA. Even flying NYC last night in the Curtiss Jenny was butter! LaGuardia traffic was liek WhAAAAT is that doing there.
What website address do most of you get Rivatuner from?
No idea, just googled it at the time and found the official site
rivatuner dot net and version 7.3.3 just before the MSI afterburner integration.
EDIT come to think of it the Guru3D site is the official site and perhaps a better choice!
Is there a written guide how to set this up with Rivatuner? I have the same pc specs aas you mention and would like to try it out! 
Can you elaborate on the math? RTSS is just a good frame lock - or did you use it for something else?
Does DLSS with the 4090 still suffer from mucked up glass cockpit panels?
I haven’t messed DLSS on my 3080ti since late last year but it wasn’t usable with a G1000/G3000 equipped airplane.
With Target of 45FPS Butter smooth Fast, Low level, flying experience:
RTSS specifically to msfs exe limit frame rate to 45. Frametime efficiency makes a huge difference to total smoothness. In OpenXR tools for WMR, purple goggles, I have 150% render scale, G2 3260 pixels, use best frame rate, not 1/2 1/3 etc, uncheck Disable optical flow, and select “prefer frame rate over latency” all in the purple goggles.
WMR portal headset is set to “optimize for performance”, Display resolution “for best quality”. 90Hz. MSFS settings:
PC tab: DX12, I run a 1920x1200 screen windowed with no VRR so fixed 60Hz. DLSS ultra Performance . Vysnc off, reflex off, AMD Fx sharpening 0, Global Quality to LOW-END.
On the VR Tab: DLSS: Balanced, reprojection off, FX sharpening 0, world scale 100% reflex off, TLOD 150 OLOD 150, Ultra to high on everything except grass/bushes. clouds high, textures ultra, 16X, 8X8, shadows 1536, 1024, contact shadows off, windshield medium, ambient occlusions off, cubemap 192, lightshaft off bloom off and cockpit high.
Toolkit: Ctrl #2 MR On and Unlocked, No override, No FFR, FSR 50%-90% sharpening, No turbo, MASK off. You can play with Sunglass on Light in toolkit.
USERCFG.opt GraphicsVR Sharpening to 0, we’re choosing to use Toolkit Sharpening, not MSFS AMD FX. Even with slider set to 0 in VR tab, it still robs resources.
Set USERCFG.opt to Read-only. This allows you to “keep” your best Setting locked. You can adjust in game all you want to experiment, but each new session you get your OG best settings from read-only. until you tweaked till you fry your brain.
There is some debate about using purple goggles vs toolkit override to scale image. My Brother feels the toolkit does a better job with sharpness at long distance and Tools for WMR does better job in sharpening the cockpit. Apparently, you can’t have both… Choose what side you’re on… dark side…
The Choice of TAA vs DLSS: DLSS calculates quicker with tensor cores etc so you get your 45+ without MR, then add 45fps lock frame time from RIvatuner, and better MR on toolkit, and you GET BUTTER SMOOTH flying! no app is doing things twice.
Toolkit’s Override option overrides the Purple goggles renderscale. turning on Override negates any value in purple goggle renderscale. G2 is 2160x2160 x 1.5 is 3260 = 150% in purple goggles. Some consensus on 4090 is you can push purple goggles renderscale to 200% or toolkit’s override of 4100 (x1.9ish) per eye. Load up CPU with renderscale so you still hit 45FPS, giving as big an image for DLSS to work with. No overlap of applications doing same task, just in the right strengths.
at 150% up to 200% purple goggles app you can live with it, but in the end you supersample such a big image it is ok. i have zero wobbles and stutters are basically gone.
If I recall, I wasn’t able to super sample enough on the 3080ti to my liking. DLSS was great, except the Garmin screens looked like they were covered in petroleum jelly.
What is this Purple goggles? I’ve been gone for about 5 months. 
OpenXR tools for WMR, purple goggles icon.
yup, 4090 FTW… My objective was scaling for 45fps+ without MR, then lock frame time with Rivatuner, and toolkit doing the MR either unlocked or 45fps. You can build the whole thing at 30fps and rivatuner lock at 30 and work with lower renderscales. DLSS benefits hugely from the largest image for the AI algorithms to do their thing. Added benefit, no prop wobble either!
install rivatuner. I used 7.3.3 but there are 7.3.4 and a version inside MSI Afterburner.
Run MSFS. open Rivatuner, Hold down CTRL key and click ADD button on Rivatuner. this will find the micrsoftflightsimulator exe. Then select the msfs exe in the left panel and on the right you’ll see frame rate limiter and type in 45 press enter. Rivatuner needs to run minimized. You can set it to launch on windows start and run minimized.
Try also TLOD at 155 or better at 205 or 245. This surely take gpu resources but there is a post over here that I can’t find that explains the improvement in scenery visuals at this precise steps.
So if you are on TLOD 150 you have the benefits of TLOD from 105 to 150 but at gpu cost of 150, but if you push to 155 difference is small and get a first step on visual quality. Same for other vslues explained.
Oh, lol! Just OpenXR.
I’ll have to see what I can sell my 3080ti for. Everything I’ve been reading so far seems to indicate the 4090 seems to squeak into that area of good quality with acceptable frame rates.
Thank you, I will try your settings.
This I don’t get. 2160x2160 per eye is the native display resolution of G2. The actually rendered video on 100% is around 3196x3124 if I recall correctly (to counter barrel distortion). So any supersampling would go based on that.