Does the 2013 MBA support 450mbit 802.11N?

Discussion in 'MacBook Air' started by wressus, Sep 1, 2013.

  1. wressus macrumors member

    Joined:
    Nov 2, 2010
    #1
    Hello! I bought a new 2013 MBA 13" yesterday, and own a airport extreme 5th generation. I took for granted that the Macbook air would support triple band 802.11N, but I can only get 300mbit connection to my router. Am I doing something wrong, or does the new MBA not have triple antenna?
     
  2. magbarn macrumors 68000

    Joined:
    Oct 25, 2008
    #2
    Nope only MBP have 3x3 wifi antenna configuration, so you're limited to 300mbit max on straight Wireless N
     
  3. Mrbobb macrumors 601

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    Aug 27, 2012
  4. wressus thread starter macrumors member

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    Nov 2, 2010
    #4
    That would be 6th generation aiport extreme.
     
  5. Mrbobb macrumors 601

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    Aug 27, 2012
    #5
    ISee.

    Well OP don't get too excited as I found out more often that not the number quoted is nowhere near what u get in real life.
     
  6. Cave Man macrumors 604

    Cave Man

    #6
    I have a 2013 MBA and the 802.11ac AEBS and only get 300 Mbit/s.
     
  7. bp1000 macrumors 65816

    Joined:
    Jul 7, 2011
    #7
    I'm confused i thought wifi-ac did 1300Mbps at 80mhz and wifi-n did 450Mbps at 40mhz ?

    At least when reading apples page on the AX... And the MBA 2013 should be capable of hitting these speed targets (providing no obstacles and short distances etc)
     
  8. cbautis2 macrumors 6502a

    Joined:
    Aug 17, 2013
    #8
    That can only be achieve if the adapter has 3 antenna plugs and supports 3T3R MIMO streams. Note that per each antenna/stream, Wireless-N can carry 150Mbps on 64-QAM, 40 MHz channel connection while AC can do 433.3 Mbps on 80MHz channel width, 256-QAM. That's where the claim 3x the N speed comes.

    If you looked at the teardown of the 2013 MBA, you'll see that there are only 2 antenna connections and the Broadcom Wi-Fi Adapter can only do 2T2R streams which effectively results to 866 Mbps connection.

    On the same token, the maximum link speed on Wireless-N with 2T2R streams is 300Mbps.

    Some of the 3T3R MIMO Wireless-AC adapters that can do 1.3 Gbps are only found on Desktop PCI-E x1 ports
     
  9. Cave Man macrumors 604

    Cave Man

    #9
    So does that mean my 2013 MacBook Air 802.11ac is no faster than 802.11n?
     
  10. AXs macrumors 6502a

    AXs

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    Sep 7, 2009
  11. Cave Man macrumors 604

    Cave Man

    #11
    As you can see from my first post in this thread, I do.
     
  12. AXs macrumors 6502a

    AXs

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    Sep 7, 2009
  13. bp1000 macrumors 65816

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    Jul 7, 2011
    #13
    Thanks! I hadn't realised this, perhaps i didnt read it properly / or i didnt understand but, it should really be as transparent as your post to explain the true speeds you could achieve.
     
  14. Cave Man macrumors 604

    Cave Man

    #14
    I did, which is why I posted. I'm only getting 300 Mbits/sec but supposedly the 2013 MacBook Air should get >800 Mbits/sec with the new AEBSac.
     

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