Sorry if I come across as an unfriendly person because I wasn't very constructive but the problem is that is the card is very bad and you can't fix it. If you can't force 40MHz, just go buy an Intel 6200 which is a very good and cheap dual-band card and replace the Atheros in question. Only allowed settings are 20MHz or AUTO (40MHz or 20MHz if no neighboring networks are detected) This may or may not be possible as routers that are certified should not allow that. Now to top it off- you're already connected at 802.11n- your connection speed id 65mbps which is above 54mbps that is possible on 802.11g.Ħ5mbps is possible on 20MHz channel width- your only hope is to force 40MHz channel on the router which would bump you to 135mbps.

Setting band, channel width and connection type (802.11n or 802.11b/g) and security (WEP, WPA, WPA2) and so on is all done on the router- the router is in charge and the client device has to comply. It tends to slow down to a crawl in 802.11n mode while it works perfectly fine in 802.11g.Īlso it does not support 5GHz so don't expect this option to be available because it couldn't have been even if settings like that depended on a Wi-Fi card- and they don't. First and foremost your wireless card is crap- one of the most troublesome Wi-Fi cards ever to hit the market (only Intel 2200 seemed to be worse than that).

Qualcomm atheros ar9485 support 5ghz