Wireless Networking Performance
Our wireless networking benchmarking consists of IxChariot's TCP Throughput test using an ASRock Vision X 471D server hardwired and the client system connected through its on-board adapter. The reference router is Asus' RT-AC66U.
As you can see, you're better off sticking with the 5GHz band for performance, so long as you can stay within its more limited range (the 2.4GHz signal stays stronger over greater distances).