I have Comcast and I pay for Performance 20Mbps with power Boost for internet speed, Windows 7, Intel Core I5 , 8GB of memory, Motorola SB 6120 and CAT 6a Cables. My xbox that is furthest away from the router says around 2.37Mb on Cinemanow now and the xbox closest gets up to 3.35 Mb which is still not good enough for HD according to Cinemanow(3.5Mb needed). Speedtest.com says my speed on my computer plugged into the router is 25.45Mb as the highest for my Download and 4.67 as the highest for my Upload. My local area connection status on my computer which is plugged into the router says 1Gbps as well. Any thoughts?