2014 MBP Retina WiFi keeps changing MCS

Discussion in 'MacBook Pro' started by JeffryA, Aug 31, 2015.

  1. JeffryA macrumors newbie

    Joined:
    Aug 31, 2015
    Location:
    Lake Worth, FL
    #1
    I use a Netgear R6700 running DD-WRT. The 5G band supports only AC, and my MBP is the only device using 5G. Sometimes it connects at MCS 7 and achieves 867 mbps. Other times it connects at MCS 9 and achieves 878 mbps. While the speeds are similar (and I'm not complaining), MCS 7 is using 3 spatial streams, but MCS 9 is using only two. I see the same RSSI and SNR at both MCS.

    Any thoughts on why it goes back and forth?

    Thanks for your help.
     
  2. Samuelsan2001 macrumors 603

    Joined:
    Oct 24, 2013
    #2
    No idea and with those numbers I see no reason to give a monkeys either.
     
  3. cbautis2 macrumors 6502a

    Joined:
    Aug 17, 2013
    #3
    The firmware knows what MCS level is the best at the moment. If it stays at the highest MCS, it would probably caused a higher error detection rate and you'll have dropped connections.
     

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