SBG8300 is a gateway, combination of modem and router so this will be having dual band setting that means 2.4 and 5G network for Wi-Fi. 5 GHz Wi-Fi speed is faster than 2.4 GHz Wi-Fi speed. It has more bandwidth compared to 802.11n and can reach up to 6 times the speed of 2.4 GHz. Since this frequency band has less interference, it also offers higher speeds when used in an area with fewer people using wi-fi or mobile data networks. You can connect your devices accordingly to the requirement and usage of that particular device.