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I'm having a very slow connection with only 60Mbit-90Mbit in 5Ghz WiFi 6

  1. WiFi Card killer 1650 (ax 200) chipset
  2. TP-link AX23 (put next to my pc)
  3. Windows OS

I have tried to test speed with iperf3 with other devices with conclusion other devices iperf to each other could hit 600mbit easily but not to my PC with killer 1650

  1. Macbook air
  2. lenovo thinkpad
  3. Matepad huawei 10.4

things i have done

  1. Install dual boot Ubuntu 22 and works charm, get speed as expected but when back to windows 10 is slow
  2. update BIOS for asrock b450 pro4: nothing changed
  3. reinstall windows 10 to windows 11, nothing changed
  4. install older driver: nothing changed

so i am getting frustrated because TP LINK AX23 mention could hit 1200 Mbits/s with wifi6

here are pictures enter image description here enter image description here

any ideas on this?

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7
  • (1) Have you installed the latest drivers? (2) The opposite advice is to uninstall all the killer software & driver and reboot to use the Microsoft driver. (3) Have you tried another WiFi card, or even an external USB network adapter?
    – harrymc
    Commented Nov 10, 2022 at 16:24
  • 1) yes i tried with latest driver first only trying to look workaround 2) i dont have killer software installed on fresh install windows 11 and first try on windows 10, 3) yes, i did actually. i tried the ax200 (non killer) and its the same so i returned it to the shop, exchanged with killer 1.
    – david valentino
    Commented Nov 11, 2022 at 15:00
  • More: (1) Power Options < Change Plan Options < Change Advanced Power Settings > Wireless Adapter Settings > Power Saving Mode change “Setting” to “Maximum Performance” on both “On battery” and “Plugged in”. (2) Properties of the network adapter, Advanced, change Wireless Mode to "08 - 11 a/b/g/n". (3) Disable Bluetooth, (4) Change your network adapter to non-Killer.
    – harrymc
    Commented Nov 11, 2022 at 15:54
  • thanks for the reply @harrymc. 1) i checked its already on maximum on every profiles, i think its maxixmum by default on PC since not battery powered 2) u mean on the device manager? there already a//b/g/n/ax 3) tried any the same 4) tried with ordinary ax200 also having same issue
    – david valentino
    Commented Nov 13, 2022 at 3:19
  • You're only testing Killer hardware/software, so may encounter repeatedly the same problem. Try non-Killer hardware, even just an external USB adapter.
    – harrymc
    Commented Nov 13, 2022 at 8:53

3 Answers 3

Reset to default
1

You can try a few things. First try to disable autotuning via the command line;

netsh int tcp set global autotuninglevel=disabled

Second (this happened to me on a bad cable on ethernet on a MacBook, but might also happen on WiFi and Windows) is that the interace unfairly gets downgraded to 100baseTX. You want to look this up in your adapter settings via de device manager and see if you can manually force it to 1000baseT (1Gbit) and Full Duplex, because your test clearly shows a 100Mbit upper limit. In my case it was even stranger, because mine was bouncing randomly between 100~250Mbit.

Sorry for not showing more details with paths and images, since I currently don't have a Windows device present to share the exact steps.

I hope it helps or sets you on the right path!

Edit; I found this image online for which I was referring to, but it shows 100Mbps in the image. Here choose 1.0Gbit or 1000Mbps (Full Duplex) (depending on the interface settings). It's not relevant that this is ethernet. It should be the same for WiFi interfaces;

enter image description here

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  • thankyou for the repsonse. but, unfortunately, the settings you show and the case example of macbook is for ethernet connection, not Wi-Fi connection :)
    – david valentino
    Commented Nov 10, 2022 at 15:07
  • That's true. But it there might've been something you could work with with your adapter. My TP-Link Archer USB WiFi stick also had all kinds of these settings. But it's very obvious from your tests that your adapter is hard-locked at 100mbps. Windows is likely choking it somewhere with the drivers and/or adapter settings. Otherwise its maybe possible to test the same adapter on another computer to see if it behaves the same.
    – Fëanorson
    Commented Nov 11, 2022 at 11:02
  • yes unfortunately that option only available in the ethernet, uinfortunately i dont have other PC, thats why im using other device for tab and macbook. BUT i tried on same PC with ubuntu 22 OS everything is good
    – david valentino
    Commented Nov 13, 2022 at 3:20
1

I had this on my Windows 11 machine with my Wi-Fi network card and HyperV network card which was set behind.

Fixed this by disabling - Large Send Offload (LSO) within HyperV network card

Steps:

1 - Open Control Panel

2 - Go to "Network and Sharing Center" > "Change adapter settings"

3 - Right-click your network connection and select "Properties"

4 - Click "Configure" next to your network adapter

5 - Go to the "Advanced" tab and set "Large Send Offload v2 (IPv4)" and "Large Send Offload v2 (IPv6)" to "Disabled"

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+50

The post Very slow download speeds with intel wifi 6 ax200 treats the question.

One answer suggests using an older driver, mentioning specifically version 21.80.2 as the last version which worked correctly. All later version (according to the answer) have this problem.

Another answer in this post recommends doing :

netsh int tcp set global autotuninglevel=normal.
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1
  • i haven't try the solution yet, but this answer relates to the question, so i give bounty to this first, ill update the result later
    – david valentino
    Commented Nov 18, 2022 at 4:15

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