Asus RT-AC87U Wi-Fi router review: Yes, it's fast

We've come to crown the new king of Wi-Fi routers: The Asus RT-AC87U is by far the fastest wireless router PCWorld has ever tested. But before you run out and buy one, know that our pronouncement includes caveats. The RT-AC87U is blistering fast when paired with a second RT-AC87U configured as a wireless bridge, but its performance is somewhat less impressive in other scenarios. The first thing you'll notice about the new Asus RT-AC87U is that it has four antennas. It's the first 4x4 router, mea...