Kevin_Z wrote @ahuse7 Sorry to jump in, have you checked the QoS settings on the Archer C5400X? You can follow this article to review the settings: https://www.tp-link.com/support/faq/2797/ @Kevin_Z...

@IrvSp "What is the Wifi device? What is its 802.11 speed rating, N, AC, AX? How is it connected to your PC, built-in, USB 2.0, 3.x?" Lots of devices. Similar story on each, Here are some examples...

Just upgraeded my internet service to gigabit fiber. On speed test through the Tether app its showing direct speeds to the router of over 900Mbps down and over 850Mbps up, but on speed test from wifi...