Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

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Ku6epgeg
Posts: 6
Joined: 12 Jun 2021, 12:05

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by Ku6epgeg » 23 Mar 2025, 05:42

I came across this topic by accident. I also have a built-in realtek 2.5, and I also see a delay in CS2. I bought a 1 GB realtek usb and it has the lowest input latency with Windows 11 drivers. I don't understand why this is so, the usb card lacks settings such as interrupt moderation and flow control, as well as receive and transmit buffers - 16 and 18. Can anyone explain why this is so? Why is the delay minimal on the usb network card? And it is on windows 11 stock drivers. If you install the latest realtek drivers, then flow control appears and the receive and transmit buffer is already getting 37, CS2 is starting to get worse. So the best option for me at the moment is a usb 1gb realtek on windows 11 stock drivers.

SchwarzRus
Posts: 4
Joined: 23 Mar 2025, 08:38

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by SchwarzRus » 23 Mar 2025, 08:57

I've done some tests in PUBG, and I think it's best to use the following Realtek Gaming 2.5gbe options:
1. Disable RSS (the latest Win 11 Realtek drivers have already disabled RSS and hidden this option for the user).
2. Disable MSI-mode for NIC using MSI_util (Yes, there should be one positive IRQ number for the network card)
3. Reduce the number of transmit and receive buffers to 128 (256) for both. This should be the minimum value to prevent possible packet loss.
4. Disable power saving in the Adapter Properties Device Manager.

Other settings such as flow control, interrupt moderation, TCP checksums etc should be set by default.

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Panychkaaa
Posts: 8
Joined: 17 Feb 2024, 03:59

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by Panychkaaa » 23 Mar 2025, 10:13

SchwarzRus wrote:
23 Mar 2025, 08:57
1. Disable RSS (the latest Win 11 Realtek drivers have already disabled RSS and hidden this option for the user).
+++++++++ ;)

Ku6epgeg
Posts: 6
Joined: 12 Jun 2021, 12:05

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by Ku6epgeg » 23 Mar 2025, 10:20

And what is MSI_util? I have an Asus motherboard. Tell me, what is MSI mode and where does it turn off?

FYNE
Posts: 20
Joined: 10 Feb 2025, 04:32

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by FYNE » 23 Mar 2025, 10:50

Ku6epgeg wrote:
23 Mar 2025, 10:20
And what is MSI_util? I have an Asus motherboard. Tell me, what is MSI mode and where does it turn off?
https://forums.guru3d.com/threads/windo ... ol.378044/

JimCarry
Posts: 586
Joined: 24 May 2024, 20:01
Location: csgo

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by JimCarry » 23 Mar 2025, 14:09

SchwarzRus wrote:
23 Mar 2025, 08:57
I've done some tests in PUBG, and I think it's best to use the following Realtek Gaming 2.5gbe options:
1. Disable RSS (the latest Win 11 Realtek drivers have already disabled RSS and hidden this option for the user).
2. Disable MSI-mode for NIC using MSI_util (Yes, there should be one positive IRQ number for the network card)
3. Reduce the number of transmit and receive buffers to 128 (256) for both. This should be the minimum value to prevent possible packet loss.
4. Disable power saving in the Adapter Properties Device Manager.

Other settings such as flow control, interrupt moderation, TCP checksums etc should be set by default.
So if i am using windows 10 i should

1.disable receive side scaling in the Adapter Properties Device Manager
2.untick msi mode for "Realtek Gaming 2.5GbE Family Controller'" in msi util.
3.change receive / transmit buffers to 128 in the Adapter Properties Device Manager.
4.Disable power saving in the Adapter Properties Device Manager.

and i am good right ?

SchwarzRus
Posts: 4
Joined: 23 Mar 2025, 08:38

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by SchwarzRus » 23 Mar 2025, 16:33

JimCarry wrote:
23 Mar 2025, 14:09
So if i am using windows 10 i should disable receive side scaling in the advancced options,then change receive / transmit buffers to 128,after that and the other stuff you wrote i should be ready right ?
Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.

JimCarry
Posts: 586
Joined: 24 May 2024, 20:01
Location: csgo

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by JimCarry » 23 Mar 2025, 21:18

SchwarzRus wrote:
23 Mar 2025, 16:33
JimCarry wrote:
23 Mar 2025, 14:09
So if i am using windows 10 i should disable receive side scaling in the advancced options,then change receive / transmit buffers to 128,after that and the other stuff you wrote i should be ready right ?
Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.
should i also disable rss in cmd?and should i also decrease the number ot maximum number of rss qs,because i put it to 4 ?
Last edited by JimCarry on 26 Mar 2025, 15:35, edited 1 time in total.

SchwarzRus
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Joined: 23 Mar 2025, 08:38

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by SchwarzRus » 24 Mar 2025, 13:02

JimCarry wrote:
23 Mar 2025, 21:18
SchwarzRus wrote:
23 Mar 2025, 16:33
JimCarry wrote:
23 Mar 2025, 14:09
So if i am using windows 10 i should disable receive side scaling in the advancced options,then change receive / transmit buffers to 128,after that and the other stuff you wrote i should be ready right ?
Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.
should i also disable rss in cmd?and should i also decrease the number ot maximum number of rss qs,because i put it to 4 ?
I didn't do that. As I said, I recommend using the default network card settings, except for the ones I posted.

Ku6epgeg
Posts: 6
Joined: 12 Jun 2021, 12:05

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

Post by Ku6epgeg » 26 Mar 2025, 06:33

SchwarzRus
Did I understand correctly that in MSI utility v3 you need to uncheck the box in the MSI item against your network card?
234122.jpg
234122.jpg (171.36 KiB) Viewed 5014 times
Do I need to change anything else here in this utility?

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