144hz mode problem since nvidia 4090

[dany_bonin]

Hello, i have a valve index and i love this headset. I was using a nvidia 3090 and everything worked great. Then i switched to a 4090, and since i have this GPU the 144hz mode is wrong.

Everything seams normal at first, but when turning my head, there is a delay that make it unusable. Makes me sick and dizzy in few seconds. It feel like there is a few milliseconds delay of the image in the headset.

At 80, 90 and 120hz mode, the problem is not there or at least i can't see it. But at 144hz, it's there. Was ok with the 3090, only problem with the 4090. I tryed all the nvidia drivers since release of the 4090 but nothing helped.

my specs : cpu : AMD 5900x
gpu : nvidia 4090
os : latest win 10
monitor : asus pg32uqx (4k, 144hz, g-sync, hdr)
vr : valve index with 4 base stations

Reported this to nvidia but had no answer. Thanks you for your help.
Dany

[The Urban Goose]

Ok first of all I don't have a 4090, or an index myself (although I'm trying to buy the latter), but I'm gonna try and give you something to work with here.

First of all: Recently Discord had an update that causes NVIDIA GPUs to not run at full speed, so if you have that running on your PC you need to follow this short guide for a fix: https://nvidia.custhelp.com/app/answers/detail/a_id/5443/~/when-discord-is-open-in-the-background,-graphics-card-memory-clocks-will-not
(It's gonna be fixed via drivers soon, but this works for now)

Secondly, the Index actually only officially supports 120 Hz, with the 144 Hz mode being experimental or in other words: an overclock of the display. (source: https://www.valvesoftware.com/en/index/headset just below the details of the display, near the top of the page)

You could also try contacting Valve directly (if you haven't done so already)
You can do that here: https://help.steampowered.com/en/wizard/HelpWithValveIndex
This should take you directly to the support page for the Index, where you can click "Contact Steam Support" and send a support request there as well.

I know it's probably not much help, and not what you wanted to hear (especially that second part), but I hope this helps at least a little.

[dany_bonin]

Thanks for your help. No discord running. Yes you are right, 144hz is still considered experimental. Just weird that with the 3090, it's working good but not with the 4090. I found people online that seams to have the same problem with index @ 144hz + 4090.

[The Urban Goose]

If I had to make a guess, I'd either say silicon lottery (minor manufacturing inconsistencies can make some chips perform slightly better than others) or it's some sort of timing issue with the way the signal is output.

I'd just use 120 Hz, which is great already, and just check every now and then if a Driver update fixes the issue.

[WildSnorlaX]

in order to get 144hz it IS NOT always by default, sometimes u have to edit .ini files and add options.. google is ur friend...use it.. don't expect support to help you TAILORED to your issue!

best cased scenario is you will get a canned response MUCH LIKE IN HERE!

[dany_bonin]

Was working perfect with a 3090.

[GbanderCat]

I am having the exact same issue. 4090 with valve index 144hz lags like crazy. I had no lag with my 3080. Thinking of returning the new 4090 asus gpu. Is this an issue with valve drivers not supporting or a nvidia driver issue? Any one know or can help?

[dany_bonin]

I found a workaround. Not ideal, but it works. I put +7 for 144hz, +4 for 120hz, and 0 for 90hz.

https://www.reddit.com/r/SteamVR/comments/118vlrl/fix_for_rtx_4090_and_vr_tracking_input_latency_lag/

[GbanderCat]

Driver updates fixed the issue and my 4090 with 9800x3d is running the index at 144 with no issues