Broadcom TurboQAM

TurboQAM is the Broadcom name for non-standard 256-QAM support on 2.4GHz 802.11n enabling a data rate of up to 200Mbps per spatial stream instead of 150Mbps with the standard 64-QAM.

Maximum Data Rate per spatial stream @ 40MHz for 802.11n and 80MHz for 802.11ac: