As everyone is aware the drivers for this card are not the best and NOT updated and released enough from Acer
This card is in My w700 and my Girlfriends v5-572p
Both these devices had poor wifi connection and NO Miracast Support in Windows 8.1
So i updated the Wifi and Bluetooth software to 263 from acer then manually updated to the 274 driver from
http://www.station-drivers.com/index.php/listes-constructeurs/42-qualcomm-atheros/44-qualcomm-atheros-wireless
The 274 drivers are mid way down the page ish
These drivers seem alot better to me, you may still want to change some of the powermanagement setting but that is up to you.
Hope this helps a few people out
These drivers seem alot better to meTh