Half-Life Alyx buggy hand motion and suttering

Also another important thing is to make sure SteamVR window is active by clicking on it

Uh nevermind, its actually not a solution. I have no idea how to fix it

I have an update about topic. I don't know how exaxctly I solved the problem but I can tell what I use and what I changed.

So I use Quest 2 Air Link and I use 72 hz recommended settings, Auto render resolution. (I think on 120 hz it stutters). Steam settings for game: Auto render resolution. I don't use any steam launch parameters except "-novid" to skip intro.

What I changed in NVIDIA Control Panel global paremeters:

Low Latency: Enabled
Virtual reality pre-rendered frames set to use the 3d application setting
Refresh rate set to use 3d application setting

V-Sync: OFF

Windows 11 settings:

Hardware-Accelerated GPU Scheduling: Enabled
Gaming mode: Enabled
Xbox Game Bar: uninstalled (I believe it helped in non-VR game as well, Fortnite)
Turn off EVERYTHING on background, basically it can be browser, Discord (which can eat 500 and more MB of VRAM), all kind of launchers (except Steam ofc), everything and what might be important turn off even GeForce Experience

Oculus setting:

Pretty much all default
72 hz, Auto render resolution
ASW - Auto (On)

The results are amazing for me, it never worked that good. Hand movements without stutters, fights without stutters, puzzles without stutters, weapon selection without stutters, everything work great.

The game actually require very much VRAM so if you see notification about not enough VRAM it most likely actually mean you have not enough. I've seen it using 13Gb of VRAM while I have only 16Gb in total. If you have not much VRAM then forget about Ultra textures quality for sure. I wish I knew exactly what helped me but finding it out requires too much time which I don't have. I solved the problem for myself and I hope this info will be helpful for someone.

Once again some of my PC specs and other info if someone need:
i7-13700KF, 4x8 DDR4-3600 MHz 32Gb Gear 1, RTX 4080 16 Gb, 240 Hz monitor
Windows 11, Quest 2

HL Alyx setttings I use: Ultra, DX11

P.S. and one more important thing I did is made more free space on my SSD which definitely could affect. I really can't figure out what else 

P.P.S. I'm also using FPS VR app and it make me think that some bug in it theoretically could cause an issues. I actually uninstalled it recently and installed back so theoretically it could help 

There is something interesting I figured out today related to the topic. I played Into The Radius game (Quest 2 version not PCVR) and at some point I decided to do a break from game so I just pause it, put Quest 2 on charging and go away for a some time. When I returned and put VR on the head, I see guardian boundary was pixelated for some reason but I thought welp strange but doesnt matter much. Then I noticed buggy hand motion (bugged tracking of controllers). And here is interesting part about it: when I turn my body to the side where is the window in reality with daylight (no other lights anywhere, even PC/TV is off) then controller tracking becomes buggy, it is stuttering non-stop. I turn my body to other sides - tracking is completely fine! That was shocking for me because I thought problem is on PC, but turns out its tracking problem. What I did next is I set tracking frequency to 60 hz instead of Auto and restart Quest 2. After that all was ok. Not sure what helped - the restart or tracking frequency change. 

TL:DR so for everyone who got buggy hand motion - play around with Guardian and Tracking Frequency and Quest controllers, as it seem to be all about that.