I am using HP W500 miniPCI card, this card can support 802.11a/b/g at winxp, but at RouterOS it seem just support 802.11 a/b .
/interface wireless info print
interface-type=Atheros AR5211 tx-power-control=yes ack-timeout-control=yes alignment-mode=yes virtual-aps=yes noise-floor-control=yes
scan-support=yes burst-support=yes supported-bands=2GHz-B,5GHz,5GHz-turbo
2GHz-B-channels=2412,2417,2422,2427,2432,2437,2442,2447,2452,2457,2462,2467,2472
5GHz-channels=5180,5200,5220,5240,5260,5280,5300,5320,5745,5765,5785,5805 5GHz-turbo-channels=5210,5250,5290,5760,5800