802.11n Vs 802.11ac

802.11n Versus 802.11ac
IEEE Standard	802.11n	802.11ac
Ratification	2009	Jan-2014 (Wave-1)
Frequency Band	2.4GHz and 5 GHz	5 GHz
PHY Rates	65 Mbps – 600 Mbps	250 Mbps – 6.5 Gbps
Technology	OFDM	OFDM
Modulation	Up to 64 QAM	Up to 256 QAM
Channel Widths	20, 40 MHz	20, 40, 80 MHz (mandatory) 160 MHz, 80+80 MHz (optional)
Spatial Streams	1 to 4	1 to 8 total Up to 4 per client
MU-MIMO	No	Yes
Green Field	Yes	No
Implicit Beamforming	Yes	No
Explicit Beam Forming	Yes	Yes
Single Stream (1X1) Max Client Data rate per radio	150 Mbps	450 Mbps
Three Stream (3X3) Max Client Data rate per radio	450 Mbps	1.3 Gbps (80 MHz, Wave 1)
Max A-MPDU size	65,535 octets	1,048,575 octets