Hi I've just set up my new RT-N66U router with my 100mbps fibre connection and my speed has fallen off a cliff. I am getting around 2-5mbps with all the speed checkers. Running the latest firmware (18.104.22.168.260) and flashed the router after updating. QoS is not running. I am testing the router via Cat6 1 gig ethernet. Any ideas what setting is causing my speed to be so low? It's not my connection as I have another router and that still allows 90-100mbps downloads. Thanks!