MSFS VR Jerky with 3080 and Quest 2 w Link Cable - But only using 50-60% GPU and CPU?

[lavapies01]

Hi all,
Have recently been lucky enough to procure an RTX 3080 - so was super excited and hopeful for getting MSFS working with good detail levels in VR.

Unfortunately despite playing with settings in the Oculus app, Oculus tray tool and MSFS as per all the guidance both here and from YouTube channels such as VR Fight Sim Guy and Pie In the Sky - I’m not able to crank the detail level very high and always get jerky movement when looking at the ground especially at low altitude - and this is despite GPU and CPU usage being about 50-60%

Have attached screengrab of CPU/GPU/Memory usage.

I have a Quest 2 connected with cable to PC with Ryzen 7 3700X, 32gb ram, MSI MPG x570 mobo, Gigabyte RTX 3080, MSFS running from primary boot SSD drive with plenty of space. Driver version 466.63. Game mode disabled. Nvidia power management normal (tried performance no difference)

Any suggestions as to why this may be happening much appreciated.

[arho10]

Wifi and GPU scale are nearly identical. I think your wifi is too slow. Have you tried link?
I noticed YOU ARE using cable. But your internet connection must be on wifi. Latency?

[lavapies01]

Thanks for the reply. Until recently I was using powerline adaptors to pump internet around the house but i realised that Wifi is actually a lot quicker when i tried a pci-e wifi adaptor. Whenever I do a broadband speed test online I always get around 100Mbps throughput using Wifi since changing over. I have a mesh wifi system in the house.

[Mobias7]

I’ve got a 3080 and a 5600X. Your experience sounds pretty similar to mine and most people with the Quest 2. I think at this point we’re all waiting now on what these upcoming Xbox optimisations bring to the sim and presuming they’ll help with FPS in VR.

At the moment though a lot of us suffer from those jerky micro stutters. The closer to the ground you get the more noticeable they are. Low level flying is just so taxing for the sim in VR, even with things dialled down. As I said though I’m just waiting now to see what things are like after the upcoming optimisations. Asobo seem pretty confident its going to cure a lot of peoples problems, including VR issues.

[lavapies01]

That’s interesting about the Xbox optimisations, thanks. Fingers crossed will lead to an improvement.

[Mobias7]

One thing to add. Now you’ve got your RTX3080 have you turned hardware accelerated GPU scheduling on in your control panel? The consensus seems to be its better to have it turned on if you’ve got an RTX 3000 series GPU.

[CodeLoran69]

You should display your CPU usage by core and not using the average displayed (43%). Right click on the CPU graph and choose display by logical cores. I have an i7 110700K OC 4,9Ghz all cores and one of my core, the one managing the mainframe of the sim, is maximized to 100% which mean the CPU is the bottleneck. The future optimization they talked about will help.

[lavapies01]

Thanks that’s a great tip. I just tried it (see screenshots). As you suggest looks like a lot of the work is being done by only a few cores, but never seems to get to 100% on any core so assuming that can’t be the bottleneck? Also just out of curiosity tried a USB speed check in Oculus app and getting 2.5gbps throughput so thinking that can’t be the limiter either.

[CodeLoran69]

I agree, CPU don’t seems to be the bottleneck in your configuration. Rather strange IMHO. Perhaps you should turn ON the debug mode in MSFS (in left main menu nearly at bottom from memory) to display the little debug window to check what it say on your monitor, limited by mainframe or limited by GPU, etc. (with something to trigger the proximity sensor of the headset so like real condition)?

edit : like below:

Edit : don’t forget to turn it OFF before leaving the sim or it will stick and hard to remove after

[lavapies01]

Thanks again. I just tried that. Frame rate in debug mode just below 30fps in the difficult London cityscape. You can see here (terrible recording sorry, and cropped).

MSFS Clip (Cropped)

Doesn’t looks as jerky in 2d as in headset but maybe that’s because everything’s exaggerated in VR.

Wondering if perhaps my expectations were too high. I guess they were set by watching youtube videos from the VR Flight Sim enthusiasts, but they seem to be able to get much better performance somehow.

All thoughts much appreciated.

[CodeLoran69]

So it’s oscillate between GPU and CPU limited according your video. Saying that, testing over London is kind of extreme and 30 fps is not that bad over this city. It’s one of the more demanding scenery with LA Airport.

Did you check one of the video over here to fine tune your settings? Let me search it…

Here it is By watching this fantastic video, you can improve the FPS in MSFS 2020 a lot!

It’s a long video (45min) but do like me : play at 2x thanks to YT option and keep a finger on the Right arrow, you can skip quickly from section to section, and note through paper and pen how to set your games.

Saying that, you should also lower LOD slider Terrain and Object as they spend resources, an also Vector Meshes. Building at more than Medium just change building in the distance, not quality near you (as seen in the video).

For reference I can’t fly over London in VR with my i7 10700K OC 4,9 all core and RTX 3070 OC +125/+1000 and an Oculus Rift CV1,so far lower resolution than your Q2.

My settings allow me to fly at 45fps nearly everywhere when using steam gauge planes ( C 152, Piaggo, Cri-cri, MB339, F-15 Model C, etc.) but London, no. Other cities like San Fransisco or Rio de Janeiro are more fps friendly and I can keep my 45fps (ASW OFF) easily.

MSFS is the most demanding on resource currently. I can play all my other Fly Sims or Racing Sims or video games in VR at my native 90fps and with supersampling… I Hope they will optimize more as it seems.

Edit : One of my favorite area fps friendly is UT25 Monument Valley. Flying between those enormous Rocks smoothly is really great. I also love to go from Courchevel in France to Geneva airport, great scenery and landscape, great fps even when landing.

[lavapies01]

Thanks again for the really helpful advice. That’s actually one of the few setup videos I think I haven’t seen Will check it out and try a few changes. Also really useful to know that your setup struggles too in demanding areas such as London. I think I maybe had unrealistic expectations after watching some of the YouTube vids, which possibly seem smoother in 2D than they would in VR. Will also try out the Monument Valley and Courcheval flights, which sound cool

[Rower7430]

Oculus link is definitely part of the problem. I have better performance on the G2 than on my quist 2 on the same settings. Oculus uses 30% of my rtx3080 on just the link, leving only 70% to run the game. Virtual Desktop ore air link on Oculus runs better than the link cabel (with good wifi) you can trye that.

[lavapies01]

Thanks for the response that’s interesting. I did wonder if link may be part of the bottleneck. I’ve also tried with the Original Rift CV1 however and am still getting jerky motion with that headset too. Unfortunately virtual desktop and air link are not options for me as my router is downstairs and I use a wifi mesh system, so performance is terrible.

[AceBelt51488155]

Try setting HAGS to OFF. On my system with HAGS ON the GPU is only using 50-60%, with HAGS OFF it uses 100%