res enabled by 802.11n including LDPC, TxBF and MLD. The end result is an impressive increase in rate-over-range of ~+100% at short range, ~+50% at mid range and ~+25% at long range.AR9380 is also optimized for P2P applications compliant with Wi-Fi Direct.TM With its Fast Channel Switch (FCS) feature, the channel switching time between 2.4 GHz and 5 GHz is reduced from 10 ms to as little as 1 ms.Compatibility:OS X 10.6.5 or later is requiredThis Airport Extreme Card is compatible with all Mac Pros:Mac Pro 1st generation,2006Mac Pro 2nd generation,2007Mac Pro 3rd generation,2008Mac Pro,4th generation,2009iMac 21¨iMac 27¨iMac 27" (iMac12,2) Mid 2011 Model A1312iMac 27" 2.7GHz Core i5 (A1312) - Mid 2011 iMac 27" 3.1GHz Core i5 (A1312) - Mid 2011 iMac 27" 3.4GHz Core i7 (A1312) - Mid 2011 Please Note: This card is compatible with most of the notebooks with mini PCI-E interface except IBM,HP machines.Solution Highlights:Single-chip,802.11n-certified WLAN client PCI-E client solutionSupport for 3-stream 11n MIMOConserves power with 1x1 downshift using Dynamic MIMO Power SaveEnables PHY rates of up to 450 MbpsFeatures optional 11n elements to enhance rate-over-range including.Low-density parity check(LDPC)encodingMaximum likelihood demodulation(MLD)Transmit beam forming(TXBF)Maximal ratio combining(MRC)Package Includes:1 x AR5BXB112 AR9380 PCI-E Card