As my friend stated both the router and devices must be capable of connecting at 5 GHz. The router is capable of the connection. But is the device? You can see if it is when attempting to connect the device. It will list 2.4 & 5 GHz connections. You then click on the faster 5 GHz and you should connect. If your device does not show 5 GHz then you cannot connect at the higher speed.