1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
Dismiss Notice

Welcome To SNBForums

SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.

If you'd like to post a question, simply register and have at it!

While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!

RT-N66U - very slow wifi but wired OK - what am I doing wrong?

Discussion in 'ASUS N Routers & Adapters' started by snmp945, Jun 22, 2018.

  1. snmp945

    snmp945 New Around Here

    Joined:
    Jun 22, 2018
    Messages:
    1
    Hello all,

    I just set up a new RT-N66U and am experiencing slow wifi. Here are the details:

    Tests run using https://totusoft.com/lanspeed and a new FreeNAS 11 build.
    Tests run from about 15 feet away and nearly unobstructed.
    The router is located on the top shelf of a hall closet with all 3 antennae pointed straight up.
    The client machine has an Intel 6300 3x3 card with the latest driver (capable of 450Mb/s).
    Router has latest ASUS firmware with no changes aside from security.
    Located in low density area - inSSIDer finds weak 2.4GHz from the neighbors and no 5GHz networks at all.
    Link speed ranges between 300 - 400.

    Here are the speeds I am achieving (similar for both read and write):

    LAN: 800Mb/s
    2.4GHz: 70Mb/s
    5GHz: 25Mb/s

    I know "real world" speeds will be less than the "advertised" 450Mb/s, but I don't think this is normal. In at least one review, the reviewer claims to achieve 226Mb/s over 2.4GHz, and 162Mb/s over 5GHz:

    https://www.pcworld.com/article/202...2-11n-router-for-the-home-or-home-office.html

    So far I've tried turning off encryption with no change in results.

    Any suggestions to rectify these abysmal transfer speeds? I'm especially wondering about the very low 5GHz results.

    Thanks for reading!
     
  2. Please support SNBForums! Just click on this link before you buy something from Amazon and we'll get a small commission on anything you buy. Thanks!
  3. MichaelCG

    MichaelCG Senior Member

    Joined:
    Jan 4, 2017
    Messages:
    446
    Location:
    Central US
    If the link speed for 5GHz is reporting above 300Mbps and you still only get 25Mbps, there is a good chance you have something clogging up the airspace nearby. With a 2x2 client, I was able to get over 150Mbps easily on my RT-N66u.

    It is impressive to even see 70Mbps on the 2.GHz. I rarely have ever seen anything of mine get over 50Mbps....then again, I don't have any 3x3 2.4GHz clients either.

    1.) Try a different 5GHz channel
    2.) Make sure there are no walls or doors in the transmission path for testing
    - either leave the closet door open, or pull the router/AP out for testing
    3.) Make the 3 antenna point slightly different directions instead of all 3 being aligned.
     
Please support SNBForums! Just click on this link before you buy something from Amazon and we'll get a small commission on anything you buy. Thanks!