i did this test (i use 60Hz most often anyway) and did not see jitter. i have a 2075 S/N 8kx (gen 1?).
An interesting synopsis of a study describing VR angular and positional jitter engineering is facing regarding this issue can be found here: https://vvise.iat.sfu.ca/user/data/papers/rotposjitter.pdf
Long story short it may be awhile until corrective measures are implemented as it will likely require participation of several groups of vendors engineering teams. So exhibit some adult level patience please. FYI I’m just as adversely affected as anyone but it’s certainly not gonna make me kick my dog!
That is for the jitter that folks are seeing but not the movement tracking lag.
Also still begs the question - it was fine with pre-40 series GPUs so what has changed?
Honestly if had the answer to your question I’d probably be one of the engineers analyzing the problem and working on the solution. Sorry can’t help there but I am just as eagerly waiting on the solution.
Do you also have the behaviour where it’s fine then starts stuttering/jittering on fast head movements for a few seconds?
I did for 1 day but now the HMD displays a wildly spinning graphic that resembles a really bad trip.
I HAVE FINALLY FIXED MY ISSUE IN THE MOST BIZARRE WAY EVER
So I’ve been using the pimax space environment to troubleshoot the head movement stutters because its very obvious there, and I have finally found a way to semi-consistantly fix them. I have not seen either of my 4090s run without the stutters until now, and I have been playing the last few days with no issues.
For some insane reason, installing MSI Centre and Mystic light will sometimes fix the issue. Only directly after installing it, sometimes. Then if I restart my PC, it will be back. If I then uninstall MSI Centre, it fixes it 90% of the time until I turn the PC off again.
So I’m currently in an insane loop of installing, restarting and then uninstalling MSI centre once a day but it is actually working somehow, as soon as I uninstall MSI centre and load into pimax home it’s instantly obvious that everything is super stable when moving my head and I won’t have the issue again until I restart the whole PC. Can even restart pitool without issue.
I assume it has something to do with the “overwrite 3rd party RGB software on restart” setting within Mystic Light but I have no RGB software currently installed or running so have no real understanding of what’s happening.
Either way I can finally use my 4090 so I’m happy, just wish I didn’t have to do this insane ritual to get there.
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Wow that’s crazy I’m gonna try it out of desperation though as I have tried everything else.
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yes reply if it works.
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Confirmed VR fix for my system was to install MSI center and no need for uninstalling/reinstalling MSI center either as VR just works now. The only issue I still have is the tracking jitter/lag but that appears to be a pimax tracking issue for 9 axis tracking as that is all I use so I can’t comment on lighthouse tracking functionality. The rapidly spinning display and poor performance is completely gone and VR performance is really very good. My system specs are as follows. MSI X670 Pro motherboard 7700X cpu 32 Gigs G Skill 6000 memory XFX 7900XT and cheapo 1 TB ssd non nvme as the system is still on the test bench. Pimax 5K super HMD.
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Okay… it’s a workaround. But as far as I understand not very reliable, and over time, Windows registry probably won’t like this, neither…
And - my personal experience with MSI Center and Mystic Lights: provoking Mystic light app crashes.
So, I installed after having installed my board, set up lighting once, and uninstalled it since then. I fear more problems with MSI Center than without 
Furthermore : What do others do, with Gigabyte, ASUS or ASRock mainboards?
Could be you’ve found something - on the other hand it just might be pure coincidence, and the “real culprit” is still out there somewhere
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Yeah but at least I can play VR again and I know my hardware isn’t at fault, which was my main fear. I’ve played all weekend and I’ve never had it run so stable on 90hz before, has been great.
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Roger that Jonny and thank you very much for your labors to find it as I’ve spent days on this and I’m certain you did as well. The performance of my system is great now and I’m very relieved as well knowing it’s not an unsolveable hardware issue. I hope AMD/Nvidia will investigate this further and implement whatever MSI did to fix their VR issue so everyone can enjoy their new hardware and put this all behind us.
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In order to perhaps avoid such frequent un- and reinstalling:
Did you try to simply deactivate auto-start on Windows boot of MSI Center and Mystic Lights, and then launch it manually before VR, and shut the services down again after VR?
Perhaps, something just gets messed up while booting or when running a certain time in background… 
Just an Idea 
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Rapid spinning display? Are you by chance xping this in Unity based games?
Otherwise iirc correctly in 9-axis mode there is an option to do Horizon? calibration. I have not used it back when I had no lighthouses. You may need to check with filing a support ticket possibly as they may need to perhaps to take a look with a remote session.
@PimaxQuorra please review this topic as it seems the members here may have new details that will help with 4090 issues described here.
@TonytotheB it seems there might be a fix here of sorts that is working.
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It would be something to try as iirc @SweViver used to use Zotac Nvidia program vs ? msi way back when.
This may be totally unrelated, but I have had similar stuttering problems with my Pimax5K+ and RTX3060 gpu.
I did a bunch of things to solve it, using lower versions of PiTool and firmware helped a bit, but the thing that really solved the problems was this:
Well, actually the first time I tried it, it nearly bricked my headset (Screens going black shortly after connecting the headset), but now that I tried it again, it works really well 
In short, this hack does a complete uninstall of the GPU drivers, and installs a custom, de-bloated driver.
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Hello,
Thanks for the ping, Dan.
I’ve invited the developer to look into this thread; with the new information, they might be able to discover a solution.
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Can I just clarify - before messing with this stuff - this is for the jitter issue but does not resolve the lag problem? Is that correct?
I ask as I don’t have the jitter, only the lag. So don’t want to mess if not necessary or beneficial.
Sorry but I haven’t actually experienced the latency issue, thought that may have been related to my stutters but seems not.
However MSI centre did resolve another strange issue above so might be worth trying.
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