The asus pce ac56 is a 80211ac wi fi pci express adapter which upgrades your desktop from tangle some ethernet cables to carefree industry leading 80211ac at up to 867 mbps broadcom turboqam technology super charges 24 ghz 80211n performance from 300 mbps to 400 mbps with compatible devices plus the stylish external magnetized antenna base gives you more flexibility in adjusting antenna placement to get the best signal reception quality possible the pce ac56 uses broadcoms wi fi 80211a