Hab 2 Barebones and there the Intel Ultimate-N 6300 633AN.HMWWB Wireless LAN Mini-PCIe card installed, because I Wanted to use 5 Ghz network. The first time I have about 260 Mbit with 3 of these antennas. In the second 80 to 100 Mbit, there I took over 2 antennas and only the third hereby supplemented. The built-in are probably useless for 5er network, that I will send reichts no data about me.