Card immediately Recognized and configured by Ubuntu on a laptop Acer. This is 5 stars. Speed is not as high as Claimed. Do not expect to reach 800 Mbps (megabits per second) Which is close to Gigabit! Original 811.n card of the laptop which providing 40 Mbps in one direction. This card Provides average 60 Mbps in 811.n mode and 130 Mbps in 811.ac mode. (All figures from iperf) The Wi-Fi router is Dlink AC.1200 on a gigabit cable. Although it connects to the router at 300 Mbps, 130 Mbps continuous in one direction is not too bad.