2014 MBP Retina WiFi keeps changing MCS

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

  1. JeffryA macrumors newbie

    Aug 31, 2015
    Lake Worth, FL
    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 604

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

    Aug 17, 2013
    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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