I have a TP Link AC 1200 wife dual band modem and I just upgraded to Spectrum's gig service. When I connect my cat6 ethernet directly to the modem I am getting the full 940Mbps speeds they say you get. When I connect it into the ethernet ports on the back of the router which are supposed to handle gig speeds I'm only getting around 500-550 down speeds. The upload speeds are just fine.
QoS is turned off
NAT Boost is on
Is there any other settings somewhere I should be looking for or is my router possibly have bad ethernet ports?