So, the title pretty much sums my guestion, can I use 802.11n type Airport Extreme card in 2006 Macbook, 802.11n card seems to have three antenna slots and this Macbook has only two antenna wires. In this 802.11g, the other one is not necessarily needed, but what is the situation with 802.11n, are all those three needed? Both them seem to be mini-PCi-E.