I should rest my case. Due to the experiment from https://www.gearprimer.com/technology/testing-apple-macbook-pro-wifi/, I guess 2x2 AC MU-MIMO can reach only <500Mbps limit. So it's my fault that I...

I do have an AX device. WIth AX only, the maximum is still below 500Mbps. With ac only, no different. Changing channel? No different. With QoS, nothing better. Move close to the router? It doesn't...

Very disappointing speed. Details below. LAN Speed test: 1 Gbps Wi-Fi Speed test: ~350-400 Mbps Wi-Fi Settings: 5G, Auto Channel, Auto Bandwidth (Usually 80Mhz) Mode: 802.11a/n/ac/ax mixed WAN...