iperf running on client connected to Netgear R6220's MT7603E (channel 1 htmode HT20)

[  3] 25.0-26.0 sec  5.50 MBytes  46.1 Mbits/sec
[  3] 26.0-27.0 sec  4.62 MBytes  38.8 Mbits/sec
[  3] 27.0-28.0 sec  4.75 MBytes  39.8 Mbits/sec
[  3] 28.0-29.0 sec  6.50 MBytes  54.5 Mbits/sec
[  3] 29.0-30.0 sec  7.50 MBytes  62.9 Mbits/sec
[  3] 30.0-31.0 sec  6.50 MBytes  54.5 Mbits/sec
[  3] 31.0-32.0 sec  6.75 MBytes  56.6 Mbits/sec
[  3] 32.0-33.0 sec  6.62 MBytes  55.6 Mbits/sec
[  3] 33.0-34.0 sec  6.38 MBytes  53.5 Mbits/sec
[  3] 34.0-35.0 sec  6.50 MBytes  54.5 Mbits/sec
[  3] 35.0-36.0 sec  7.25 MBytes  60.8 Mbits/sec
[  3] 36.0-37.0 sec  6.50 MBytes  54.5 Mbits/sec
[  3] 37.0-38.0 sec  6.62 MBytes  55.6 Mbits/sec
[  3] 38.0-39.0 sec  4.75 MBytes  39.8 Mbits/sec
[  3] 39.0-40.0 sec  3.25 MBytes  27.3 Mbits/sec
[  3] 40.0-41.0 sec  1.88 MBytes  15.7 Mbits/sec
[  3] 41.0-42.0 sec  1.88 MBytes  15.7 Mbits/sec
[  3] 42.0-43.0 sec  2.38 MBytes  19.9 Mbits/sec
[  3] 43.0-44.0 sec   896 KBytes  7.34 Mbits/sec
[  3] 44.0-45.0 sec  1.00 MBytes  8.39 Mbits/sec
[  3] 45.0-46.0 sec  0.00 Bytes  0.00 bits/sec
[  3] 46.0-47.0 sec  1.25 MBytes  10.5 Mbits/sec
[  3] 47.0-48.0 sec  3.00 MBytes  25.2 Mbits/sec
[  3] 48.0-49.0 sec  1.00 MBytes  8.39 Mbits/sec
[  3] 49.0-50.0 sec  1.12 MBytes  9.44 Mbits/sec
[  3] 50.0-51.0 sec  0.00 Bytes  0.00 bits/sec
[  3] 51.0-52.0 sec  1.88 MBytes  15.7 Mbits/sec
[  3] 52.0-53.0 sec  0.00 Bytes  0.00 bits/sec
[  3] 53.0-54.0 sec  1.25 MBytes  10.5 Mbits/sec
[  3] 54.0-55.0 sec  2.75 MBytes  23.1 Mbits/sec
[  3] 55.0-56.0 sec  3.75 MBytes  31.5 Mbits/sec
[  3] 56.0-57.0 sec  6.38 MBytes  53.5 Mbits/sec
[  3] 57.0-58.0 sec  6.50 MBytes  54.5 Mbits/sec
[  3] 58.0-59.0 sec  5.62 MBytes  47.2 Mbits/sec
[  3] 59.0-60.0 sec  6.38 MBytes  53.5 Mbits/sec
[  3] 60.0-61.0 sec  7.50 MBytes  62.9 Mbits/sec
[  3] 61.0-62.0 sec  6.62 MBytes  55.6 Mbits/sec
[  3] 62.0-63.0 sec  6.38 MBytes  53.5 Mbits/sec