Realtek Gaming 2.5gbe Family Controller Network Lag/Delay

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darkzinate
Posts: 2
Joined: 21 Dec 2025, 00:47

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

Post by darkzinate » 21 Dec 2025, 00:50

I suffered from this issue for more than 10 years (ever since high-speed internet plans became available). The network card simply couldn't handle the load (and it also put a strain on the CPU). In my case, the problem was resolved in a way that was both simple and complex at the same time: by purchasing a router with support for SQM CAKE (or flashing an existing one with OpenWRT) and configuring SQM queues.

akylen
Posts: 165
Joined: 02 Jan 2021, 11:59

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

Post by akylen » 22 Dec 2025, 22:20

darkzinate wrote:
21 Dec 2025, 00:50
I suffered from this issue for more than 10 years (ever since high-speed internet plans became available). The network card simply couldn't handle the load (and it also put a strain on the CPU). In my case, the problem was resolved in a way that was both simple and complex at the same time: by purchasing a router with support for SQM CAKE (or flashing an existing one with OpenWRT) and configuring SQM queues.
Hi , sorry to bother but i find this interesting , can you elaborate on what you did exactly please ?

Thanks <3

jassine
Posts: 62
Joined: 21 Jan 2024, 10:38

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

Post by jassine » 25 Dec 2025, 16:08

darkzinate wrote:
21 Dec 2025, 00:50
configuring SQM queues.
hello, what is your config of SQM ?

darkzinate
Posts: 2
Joined: 21 Dec 2025, 00:47

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

Post by darkzinate » 29 Dec 2025, 06:50

queue type


name="cake-down" kind=cake cake-bandwidth=0bps cake-overhead=0
cake-overhead-scheme="" cake-rtt=50ms cake-diffserv=diffserv4
cake-flowmode=dual-dsthost cake-nat=yes cake-wash=no
cake-ack-filter=filter

name="cake-up" kind=cake cake-bandwidth=0bps cake-overhead=0
cake-overhead-scheme="" cake-rtt=50ms cake-diffserv=diffserv4
cake-flowmode=dual-srchost cake-nat=yes cake-wash=no
cake-ack-filter=filter


queue simple

name="sqm-down" target=ether1 parent=none packet-marks="" priority=8/8
queue=cake-down/cake-down limit-at=0/0 max-limit=390M/390M
burst-limit=0/0 burst-threshold=0/0 burst-time=0s/0s bucket-size=0.1/0.1

name="sqm-up" target=bridge parent=none packet-marks="" priority=8/8
queue=cake-up/cake-up limit-at=0/0 max-limit=390M/390M burst-limit=0/0
burst-threshold=0/0 burst-time=0s/0s bucket-size=0.1/0.1

x7007
Posts: 12
Joined: 23 Aug 2021, 16:51
Location: Israel

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

Post by x7007 » 16 Feb 2026, 14:21

gideonmontes wrote:
07 Jun 2025, 05:50
Guys, try limiting EEE Max Support Speed ​​to 10 Mbps.

Here's what people write about this setting on the Internet: EEE max support speed usually indicates the maximum network speed (e.g. 1 Gbps or 10 Gbps) up to which EEE technology can be applied. For example, if you have a switch with EEE functionality and its "EEE max support speed" is 1 Gbps, this means that EEE can only be activated on networks with a maximum speed of up to 1 Gbps.


Now let's imagine that we have a network device, such as a switch, and its specifications specify a parameter called "EEE max support speed". If this parameter is, for example, 1 Gbps, this means that EEE will only work on this device for networks where the maximum speed does not exceed 1 Gbps. If the network is running at 10Gbps, EEE will not be activated and the device will operate at full power without turning on power saving mode.

Wherever I look at various video settings, for some reason everyone always recommends setting it to 1 Gbps or more.
you are indeed correct!
Changing this from 2.5Gbps or 5Gbps, which I sync on 2.5Gbps to 10mbps made a huge difference on my computer using the USB Realtek 5Gbps adapter connected to router 2.5GBps , main computer is connected to 5Gbps.

Also don't use highest buffer as it could cause a buffer miss when it's not needed. Just keep changing it until you have maximum speed without ping time outs

Misha1337
Posts: 60
Joined: 09 Dec 2016, 10:30

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

Post by Misha1337 » 16 Feb 2026, 18:22

x7007 wrote:
16 Feb 2026, 14:21
gideonmontes wrote:
07 Jun 2025, 05:50
Guys, try limiting EEE Max Support Speed ​​to 10 Mbps.

Here's what people write about this setting on the Internet: EEE max support speed usually indicates the maximum network speed (e.g. 1 Gbps or 10 Gbps) up to which EEE technology can be applied. For example, if you have a switch with EEE functionality and its "EEE max support speed" is 1 Gbps, this means that EEE can only be activated on networks with a maximum speed of up to 1 Gbps.


Now let's imagine that we have a network device, such as a switch, and its specifications specify a parameter called "EEE max support speed". If this parameter is, for example, 1 Gbps, this means that EEE will only work on this device for networks where the maximum speed does not exceed 1 Gbps. If the network is running at 10Gbps, EEE will not be activated and the device will operate at full power without turning on power saving mode.

Wherever I look at various video settings, for some reason everyone always recommends setting it to 1 Gbps or more.
you are indeed correct!
Changing this from 2.5Gbps or 5Gbps, which I sync on 2.5Gbps to 10mbps made a huge difference on my computer using the USB Realtek 5Gbps adapter connected to router 2.5GBps , main computer is connected to 5Gbps.

Also don't use highest buffer as it could cause a buffer miss when it's not needed. Just keep changing it until you have maximum speed without ping time outs

So in order to try this do I have to enable "Energy efficient Ethernet and/or Advanced EEE" in the advanced Ethernet settings tab ?

zen9292
Posts: 7
Joined: 21 Feb 2026, 12:35

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

Post by zen9292 » 24 Feb 2026, 06:18

I have a realtek pcie ethernet adapter also an intel onboard one, my ftth is 100 down/up, both have input delay and desync the usual 0.5s behind enemies even though I have 0.2 net jitter and stable ping. I disabled the intel onboard and only use my realtek pcie. My incredibly non-sensical fix is to enable metered-connection in the ethernet network settings in windows settings....this somehow magic switch fixed both my floaty aim and desync. Its been good for a bit now, dropping wins in deathmatch valorant 3 straight in a row (Ascendant 3 rank deranked from immortal). Also my particular rig somehow performs better with balanced power plan than high performance in comp shooters. My win32priority is also set to 36 hex. All nvcp on default, scaling is set to display default with aspect ratio ticked, no override ticked, vsync disabled ingame, no frame cap, reflex on+boost.

At this point I'm just throwing everything at the wall to see what sticks, months of frustration, hopefully this metered connection setting permanently stays. I will update you guys if it stays.
Last edited by zen9292 on 24 Feb 2026, 06:21, edited 1 time in total.

Sz3ypy
Posts: 25
Joined: 19 Jun 2025, 13:59

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

Post by Sz3ypy » 25 Feb 2026, 01:21

How you enable??

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