New installed OpenWrt 18.06.2 on Buffalo WZR-HP-G300NH (Hardware supports 1000Mbps both on WAN & LAN, and 300Mbps Wi-Fi)
1)LAN SPEED:About 330Mbps download speed on ASUS RT-AC66U B1 from Internet, but no more than 200Mbps download speed on WZR-HP-G300NH
2)WLAN SPEED:About 330Mbps download speed on ASUS RT-AC66U B1 from Internet, but no more than 100Mbps download speed on WZR-HP-G300NH
(Mode N, Channel 6, Width 40MHz, Transmit Power auto, Encryption WPA2-PSK, Cipher AES in LuCI)
UPLOAD SPEED is about 30Mbps, same on each router, no matter LAN of WLAN
All tests are based on 'Speedtest.net by Ookla', same remote server & same settings, Wireless speed is tested on iPhone 7 Plus
Problem of OpenWrt or WZR-HP-G300NH? How to improve?