Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
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.
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Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
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.
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.
- Panychkaaa
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Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
+++++++++SchwarzRus wrote: ↑23 Mar 2025, 08:571. Disable RSS (the latest Win 11 Realtek drivers have already disabled RSS and hidden this option for the user).

Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
And what is MSI_util? I have an Asus motherboard. Tell me, what is MSI mode and where does it turn off?
Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
So if i am using windows 10 i shouldSchwarzRus wrote: ↑23 Mar 2025, 08:57I'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.
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 ?
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Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.
Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
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 ?SchwarzRus wrote: ↑23 Mar 2025, 16:33Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.
Last edited by JimCarry on 26 Mar 2025, 15:35, edited 1 time in total.
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Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
I didn't do that. As I said, I recommend using the default network card settings, except for the ones I posted.JimCarry wrote: ↑23 Mar 2025, 21:18should 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 ?SchwarzRus wrote: ↑23 Mar 2025, 16:33Theoretically, yes. Setting the NIC driver MSI-mode to line-based IRQ is also very important.
Re: Realtek Gaming 2.5gbe Family Controller Network Lag/Delay
SchwarzRus
Did I understand correctly that in MSI utility v3 you need to uncheck the box in the MSI item against your network card? Do I need to change anything else here in this utility?
Did I understand correctly that in MSI utility v3 you need to uncheck the box in the MSI item against your network card? Do I need to change anything else here in this utility?