2.5GbE LAN causes jitterting problems exclusive to VRC
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°sky
Both Intel and Realtek 2.5GbE LAN ports on mid-high range motherboards (such as the x670e PG Lightning and Z690M Aorus Elite) have jittering issues exclusive to VRChat.
The jittering is not visible locally, however to every remote player there is extreme jittering and lack of stability when moving quickly.
Rejoining the instance temporarily fixed this for only 10-30 minutes before occuring again.
Setting the 2.5GbE NIC to run at 1GbE does not solve this issue.
Does not occur via Wi-Fi or native 1GbE NICs.
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Burgerbeast
I have had this issue since I started with VRChat in early 2021, running the same motherboard the whole time (Gigabyte B550 Aorus Pro) and a 3080, upgrading the CPU once.
However after upgrading my GPU to a 5090 and swapping out my PCI-E USB card just over a month ago, the problem seems to have completely disappeared. Before I usually had the issue after being in the same world for 2+ hours, now I've been as long as 7 hours in the same world without any issues.
I updated to the latest graphics driver and the motherboard's BIOS got reset during the upgrade, but other than that I haven't changed anything that could be relevant. Still running the same BIOS as I updated to when I upgraded my CPU, and it would've been reset back then too.
I haven't seen anyone else mention USB PCI-E cards and I'm not sure if that's relevant at all, but I went from an Inateck with 4 ports 1 controller, to a StarTech with 4 ports 4 controllers.
四季花琉
I encountered the same issue. Due to the need to stay active in pypydance for long periods, the jittering problem has been quite frustrating. I even swapped to a 50-series GPU, but it didn’t help. The motherboard I’m using is the budget-friendly MS-Challenger B760ITX D5 WIFI, which has both 2.5 and 1.0 ports. I've been using the 2.5 port, but I’m not sure if switching to the 1.0 port would make a difference (if it's a chipset issue, it probably won't have any effect, but I plan to test it later). Regarding driver issues, all I can do is update everything to the latest version, including the motherboard's BIOS, but it didn't solve the problem. I also disabled hardware acceleration in the settings, turned off CPU hyper-threading, and unlocked the motherboard's power limit, but still no change. After reading many replies, I can't pinpoint exactly which motherboard models might cause this issue. My friend using a B760 chipset motherboard from a different manufacturer has no issues.
四季花琉
I have resolved the issue by replacing the motherboard.
~Nanochip
So after a year+ of dealing with this annoying problem and vigorously testing every solution I could come across, I finally caved and upgraded my motherboard from an Asrock x670e PG Lightning to an MSI x870 Tomahawk and can confirm I no longer have the jitter issue. I guess throwing money at the problem fixes stuff, but oof. bigsadge.
ＴＩＴＡＮ
Has anyone here tried to run the game with ipv6 instead of ipv4? Maybe that can help bypass the issue in a way? I cannot do it because my isp don't support ipv6 :(
ＴＩＴＡＮ
Having this issue with no fix so far.Which wifi router are you guys using ?Also I noticed that ,when I download worlds the speed randomly hits 1-5mbps before jumping back to my 150mbps speed,are you guys experiencing same thing? Also, what gpu do you guys have ? I have a 3060
°sky
ＴＩＴＡＮ i use a davolink kevin nested in an isp router. 7800x3d, 96gb ram, 4090. i think the occasional dips when downloading worlds is vrchats cdn being bad or it not handling small assets properly
ＴＩＴＡＮ
°sky did you made any changes in the nvidia control panel by any chance?
°sky
ＴＩＴＡＮ nope, this also happened when i had an amd card as well. from what i can tell gpu vendor is largely if not entirely unrelated to this bug
ＴＩＴＡＮ
°sky Vrchat Uses UDP to send tracking and IK data to the servers, I assume there is some sort of buffer on the server side, which is experiencing a gradual overflow, thus causing the stutter .But as mentioned above it doesn't occur on Wi-Fi ,but it does occur if a network card is plugged in. This means the overflow may not be entirely on the network card, but rather how the entire motherboard is handling the network data ,on it's chipset. I am curious, the Wi-Fi you used, was it inbuilt in your motherboard, a pcie Wi-Fi card or a usb Wi-Fi adapter?
°sky
ＴＩＴＡＮ i use an intel ax210 for my wifi plugged into my motherboard m.2 e-key slot. the pcie nic i used was the £10 tplink one. it started occuring on wifi shortly after i made the post. chances are i didnt do enough testing before making the canny
ＴＩＴＡＮ
I still haven't discovered where the issue is,but on the download speed slowdowns,It is not exactly the cdn at fault.I checked with wireshark and it seems the adapter is sending a TCP Zero Window message to the server which tells the server that the receiver buffer of the client is full so the server stops sending data until that buffer is cleared.There are many Dup Acks and TCP out of order too, and Interestingly,this happens even on the wifi ,but does not happen on my old H61 mobo with a i5 4400 whatsoever.Very strange.Not sure if this is related.
ＴＩＴＡＮ
°sky What headset do you have? Are you using Virtual Desktop?
°sky
ＴＩＴＡＮ the headsets ive confirmed this happens on with my machine are: vive pro eye (wired and wireless), quest pro (vd and steamlink), varjo aero, vive xr elite (business streamer), psvr2, hp g2, valve index and the vive cosmos
°sky
this is still happening. i also saw somebody else having this when before this behaviour wasnt present
Haxy
I haven't seen this issue again recently (months), wonder if a driver update solved it at some point
°sky
Haxy can confirm this is still an issue. i was jittering for some people during the vrcft meetup during the saturday night just gone. approx 2 hours in it started, seems behaviour hasnt changed.
chances are if you dont see it, youve probably upgraded/updated something.
people with this bug do not jitter if you yourself also are prone to jittering as well.
Haxy
°sky the only changes I've made are going from a degraded 13900k to a 14900k rma, and updating bios etc, win11 24h2
ＴＩＴＡＮ
Haxy can you tell the name and model of your motherboard?
Terr4
Hello! I recently got a new PC with an ASRock B650 PG Lightning and came across this bug report. I actually haven't been told anything yet about my tracking jittering or stuttering and I've been asking about it to friends that I've been hanging out with during this week. I also do spend quite a lot of time online (yesterday I was on the same pug instance for about 7 hours) and nobody told me anything. Furthermore, there's this recording on a club where you can see me (the black and cyant robot with a hoodie and a white face dancing on the cage) moving quite a bit and not showing any stuttering.
I'm reporting this not as a "works on my machine" type of thing but rather because supposedly my motherboard is affected as listed on the replies here and so far I haven't had any issues. If needed I can list the other specs on my system.
JeyPW
Is there a list or something of motherboards without this issue? just to know which ones we should pick to avoid this.
FloydianSound
never thought about this, but i do have this issue as well since i've returned in march 2024. (asus pro art z790 creator wifi)
never had this issue with my previous build in january-february 2024 (asus strix z370-i)
Current NIC:
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