I can find nothing that has helped on the Asus help/forums.
When the nic is first connected, the speeds are great for the 5GHz; It stops there...
When this device is plugged in, no matter if the port is USB 2.0 or 3.0, the device will either stop working altogether or cause all other USB devices to stop functioning as well; In order for it to work, I have to unplug, then plug in the adapter several times a day.