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802.11ac slow-speed issue?

By AberdeenBill
Aug 7, 2016
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  1. Hello,

    We have a brand-new computer for our daughter's bedroom (Asus K20C) with 802.11ac wireless and communication with our 802.11n ADSL 2.4 GHz modem/router is very slow (about 2 Mbps download speed as monitored with www.speedttest.net and it frequently 'stalls' altogether). The 'street' internet speed coming into our house (in Aberdeen, Scotland) via the phone line is (don't laugh) 16 Mbps, which is achieved by our ethernet-connected main computer, and by wireless with an old 802.11g laptop, an 802.11n laptop and indeed an iPod. When we plug the new computer into the ethernet port, it gets 16 Mbps download speed. Placing the new computer (in wireless mode) right beside the router has no effect on download speed. I have fiddled with the modem/router (which otherwise works fine although it is now quite old) in terms of channels 1, 6 and 11 etc. again without effect. Any ideas?

    Many thanks,
    Bill
     
  2. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    Get a command prompt and enter
    pathping google.com >myNet.txt
    and wait for it to finish (sometimes up to 3 minutes).

    Open myNet.txt, and copy/paste it into your reply
     
  3. AberdeenBill

    AberdeenBill TS Rookie Topic Starter

    Hello, many thanks for the reply. Here is the pathping trace:


    Tracing route to google.com [216.58.198.174]
    over a maximum of 30 hops:
    0 DESKTOP-662PET1 [192.168.1.7]
    1 192.168.1.1
    2 host-89-240-240-1.as13285.net [89.240.240.1]
    3 host-78-151-226-51.as13285.net [78.151.226.51]
    4 host-78-151-226-232.as13285.net [78.151.226.232]
    5 host-78-144-12-75.as13285.net [78.144.12.75]
    6 74.125.48.13
    7 64.233.174.87
    8 108.170.232.97
    9 lhr25s10-in-f14.1e100.net [216.58.198.174]

    Computing statistics for 225 seconds...
    Source to Here This Node/Link
    Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
    0 DESKTOP-662PET1 [192.168.1.7]
    0/ 100 = 0% |
    1 3ms 0/ 100 = 0% 0/ 100 = 0% 192.168.1.1
    0/ 100 = 0% |
    2 27ms 0/ 100 = 0% 0/ 100 = 0% host-89-240-240-1.as13285.net [89.240.240.1]
    0/ 100 = 0% |
    3 35ms 0/ 100 = 0% 0/ 100 = 0% host-78-151-226-51.as13285.net [78.151.226.51]
    0/ 100 = 0% |
    4 34ms 0/ 100 = 0% 0/ 100 = 0% host-78-151-226-232.as13285.net [78.151.226.232]
    0/ 100 = 0% |
    5 40ms 0/ 100 = 0% 0/ 100 = 0% host-78-144-12-75.as13285.net [78.144.12.75]
    0/ 100 = 0% |
    6 40ms 0/ 100 = 0% 0/ 100 = 0% 74.125.48.13
    0/ 100 = 0% |
    7 --- 100/ 100 =100% 100/ 100 =100% 64.233.174.87
    0/ 100 = 0% |
    8 --- 100/ 100 =100% 100/ 100 =100% 108.170.232.97
    0/ 100 = 0% |
    9 42ms 0/ 100 = 0% 0/ 100 = 0% lhr25s10-in-f14.1e100.net [216.58.198.174]

    Trace complete.
     
  4. EndlessWaves

    EndlessWaves TS Booster Posts: 164   +34

    It's a brand new computer with Windows 10, so the command prompt copy/pastes properly and you don't need the text file workaround :)

    Have you grabbed the latest wi-fi drivers for the computer?
     
  5. AberdeenBill

    AberdeenBill TS Rookie Topic Starter

    Hello Waves, thanks for the reply, yes we downloaded the latest drivers but no difference :-(

    Bill
     
  6. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    The PATHPING tool allows us to see the reliability of every hop in the network and yours is just fine. Zero losses everywhere so it's not in the network or your ISP. The question then becomes what's on the PC, in the browser and the AV software you are using.
     
  7. AberdeenBill

    AberdeenBill TS Rookie Topic Starter

    Hello, the Windows 10 PC is brand new (three days old) and there isn't much loaded onto it yet. We get the same numbers for download speed with IE or Chrome as the browser. Occasionally the 'speed meter' in speedtest will flick up to a much higher speed, but it drops back to about 2 Mbps after a moment. The AV software is Microsoft defender and it doesn't show anything suspicious. The Windows Task Manager doesn't seem to show anything odd. The wireless card is a Realtek 8821AE Wireless LAN802.11ac PCI-E NIC (phew...) and the driver version is 2023.31.315.2016.

    Thanks again,
    Bill
     
  8. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    I'm going to give you to tweeks for networking which should be the defaults on every system. You can lookup the techniques using their names as to what is being done.

    1) Sackopts
    2) Tcp1323

    save both files to HD, and rename both by removing the trailing .TXT
    you'll get a warning, but that's good - - we're making them both into files which can alter the windows registry.

    Once renamed, you double click to launch each and then allow the change to run
     

    Attached Files:

  9. AberdeenBill

    AberdeenBill TS Rookie Topic Starter

    Hello, thanks again for your help. The registry changes were made, but there is no change is download speed :-( The settings on the Wi-Fi card are as follows:

    802.11d Disabled
    Antenna diversity selection Auto
    Beacon interval 100
    Multi-channel concurrent Disabled
    Preamble mode Short and long
    Roaming sensitivity level Low
    Wake on magic packet Enabled
    Wake on pattern match Enabled
    Wireless mode Auto (we tried changing this to 802.11b/g/n but it had no effect)

    Next step is to take the computer to a friend's house and see how it behaves there.

    Thanks again,
    Bill
     
  10. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    Did you look for newer firmware for the 802.11n ADSL 2.4 GHz
     
  11. AberdeenBill

    AberdeenBill TS Rookie Topic Starter

    Downloading it now (version 2023.34.430.2016) :)
     
  12. jobeard

    jobeard TS Ambassador Posts: 9,330   +622

    Bump; what's your current status??
     

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