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    Intel Centrino Ultimate-N 6300 slow/unstable

    Discussion in 'Networking and Wireless' started by eiji-gravion, Apr 8, 2011.

  1. eiji-gravion

    eiji-gravion Notebook Enthusiast

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    Hello,

    I recently got a thinkpad T520 that came with the 6300 wifi card and the performance on it is horrible at most I can get 1Mb/s and there is a lot of random packet loss and high latency.

    I have other laptops with various other wifi cards and none of them are seeing these issues.

    I've tried using 2 different versions of the driver including the newest also tried different routers, locations, power settings, etc.

    Any ideas as to what might be causing this?


    Thanks
     
    eiji-gravion, Apr 8, 2011
    #1
  2. downloads

    downloads No, Dee Dee, no! Super Moderator

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    Either one of the antennas is not connected or antennas may be connected in the wrong order (supposedly it makes a difference especially if you have three connectors like 6300 does).
    Open the service hatch and verify that antennas are connected properly.
    If you have two antennas the middle connector on the card should be free.
     
    downloads, Apr 8, 2011
    #2
  3. SHoTTa35

    SHoTTa35 Notebook Consultant

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    Not to hijack but since downloads mentioned it i figured i'd get the next logical question asked anyways- anyone know what's the order?

    There are black, white and gray cables. The white cable was originally free (i think, or was it gray?) when i switched cards to the 6300 but i was all excited and forgot to memorize which way they should go.

    Right now i think it's in this setup:

    Black - antenna 1
    Gray - antenna 2
    White - antenna 3 (middle)

    Anyone know if that's the "correct" order? :D


    EDIT - I found this pictures from a T410 (don't know why i didn't just google images before :D)

    http://www.thinkpads.com/wp-content...de/lenovo-thinkpad-t410-upgrade-wifi-card.jpg

    It shows gray should be antenna 1 and black be antenna 2 and white of-course is 3 :)
     
    SHoTTa35, Apr 8, 2011
    #3
  4. eiji-gravion

    eiji-gravion Notebook Enthusiast

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    All 3 antennas are connected in this order on my laptop.

    1 grey
    3 white
    2 black
     
    eiji-gravion, Apr 8, 2011
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  5. Bear123

    Bear123 Notebook Geek

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    FYI, in the Inspiron 1720, it would be: 1. Left side, Black 2. Right side, White and 3. Middle, Gray.
     
    Bear123, Apr 12, 2011
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  6. corpses3

    corpses3 Notebook Consultant

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    Any fix for this? I have the same issue on a T510 with Intel Ultimate 6300 N.
    --------------------
    Looks like setting the Wireless Network Adapter from Power Manager to "Maximum Performance" worked, however it's still kind of funky when switching profiles.
     
    corpses3, Apr 14, 2011
    #6