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anupbadri's avatar
anupbadri
Copper Contributor
Jul 30, 2021

sudden slow internet speed on windows 11

recently I updated my windows 10 to windows 11. after that my download speed is suddenly decreased my actual internet speed is 25mbps when I check on the speed test also its showing 25mbps but while ...
Thanh_Thao_TA's avatar
Thanh_Thao_TA
Copper Contributor
Apr 22, 2022

anupbadri 

What works for me was disabling "Network" optimization from Dell Optimizer tools.

I have a Dell Precision with WIndows 11.

I had a drop in connection everytime I would open Microsoft Teams, and it will persist even if I close the app or the web tab (from 400 Mbps to 0.5Mbps).

I tried everything from : 

- updating drivers

- updating dock driver (USB connection to my laptop)

- disabling IPV6

- trying with and without AWS VPN

- tried the web app instead of desktop app for Teams

- Windows Update

- Dell Command Update

- Office 325 Update

- trying Wifi 2.4 and 5GHz

- trying direct Ethernet connection from router

 

Found out there were artificial intelligence from Dell on the network that was "Give maximum bandwith to the conference app I'm using". I disabled the option and my connection was normal again.

  • Mikepl7's avatar
    Mikepl7
    Copper Contributor
    Jun 30, 2022

    Thanh_Thao_TA 

    Hello, I'm also having Internet download speeds issues on Windows 11, but in my case this is related to USB3 ethernet adapters, when I use WiFi it works great every time.

     

    Here is more https://superuser.com/questions/1729035/slower-internet-speeds-with-usb-ethernet-adapter-than-card-from-motherboard this is driving me nuts... I checked everything I have idea.

    • svhelden's avatar
      svhelden
      Brass Contributor
      Jul 25, 2022
      My wife's Galaxy Book started to have the same issue today. It her case it is linked to the power supply.

      Connect PS: 200 kbps
      Disconnect PS: 90 mbps
      Connect PS: 300 kbps
      Disconnect PS: 89 mbps
      • Mikepl7's avatar
        Mikepl7
        Copper Contributor
        Aug 10, 2022

        svhelden in my case it does not matter if I have plugged supply or change device power plan, this happen even if I have all set into performance mode. This issue is 100% related to Windows 11 or USB ethernet cards drivers ( funny that with chipsets from Realtek and ASIX is the same problem ). If I run test with Linux USB bootable speeds are awesome with that USB cards... easy & stable over 40-50 MB/s from Internet, normally it starts around 15 MB/s and drops to 4-5 MB/s.

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