Wifi speed depends on router and client. If your computer only has a 2x2 802.11ac card you will be lucking to get anything over 400Mbps. A 3x3 card (such as newer iMac Pro) can go up to 600Mbps. To check Gigabit speeds always plug in Ethernet to the router. With my Orbi RBK40 I can get 800+Mbps plugged in. Wireless on my 2x2 Dell laptop I can only get 300-400Mbps. My iMac Pro can get faster. Plugged in to my close satellites I can get about 500Mbps.