http://tinyurl.com/l2or5rs
TP-LINK TL-WDN3800 Dual Band Wireless N600 PCI Express Adapter, 2.4GHz 300Mbps/5Ghz 300Mbps, Include Low-profile Bracket
Achieves a maximum theoretical throughput of up to 300Mbps
Supports dual-band, 2.4GHz or 5GHz
Seamlessly compatible with 802.11a/b/g/n products
Experience smoother video streaming and online gaming by choosing the clearer 5GHz band for wireless connections
Supports 64/128 WEP, WPA /WPA2/WPA-PSK/WPA2-PSK(TKIP/AES), supports IEEE 802.1X