The ASUS RT-N66U Dual-band Gigabit Wireless-N router is an N900 router meaning that it offers connection speeds up to 450Mbps on both the 2.4GHz and 5GHz band simultaneously for a total of 900Mbps. Integrated into the ASUS RT-N66U is a 4 port Gigabit switch as well as a Gigabit WAN port. ASUS designed the RT-N66U with three removable external antennas so that the best range can be provided and antennas can be changed. There are two USB ports that support 3G/4G modems, printer sharing, and storage devices. The storage devices can be used in connection with the ASUS AiDisk, AiCloud, FTP server, and media server capability. The router is also capable of hosting up to 8 different wireless networks, including 3 guest networks on each wireless band. ASUS has 256MB of RAM installed into the system to prevent bottlenecks, and the latest security features. Including a built in firewall and security encryption up to WPA2-Enterprise."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips