Okay here's the deal, I live in a fairly large home. 4,000sq feet and 2 floors, 3 if you include fully heated basement. 4 bedrooms and a den and an office and my shop in my garage. I was working with a Wireless N router from Linksys (E4200) and wireless N networking cards, now here is the kicker, I do not walk that well so I have computers in almost every room including my bedroom, all desktops I have built. The distance between the router which is in the upstairs office to the furthest point is about 200ft. Through all plasterboard walls and concrete in the basement. I was not happy when I had to get a file from another computer in my network, it took forever, I was only getting 144mbps.
So I decided to upgrade the whole network to wireless A/C. I did my homework and decided to go with Asus, so I bought the router first. ASUS RT-AC68U Dual-Band Wireless-AC1900 Gigabit Router . Easy to set up and very happy with it. Then I had to pair all the devices with wireless A/C adapter cards. So I went with Asus again. ASUS AC1900 Dual-Band PCIe Wireless Adapter
I cannot explain the difference, its phenomenal . Let me post the status indicator from the furthest point in my basement through concrete walls. I have a gigabit Intel Ethernet connection in my main rig attached to the router, this screenshot tells all. And this is minimum, if I want to stream a file from my upstairs computer to the basement, it fly's.