My Modem is the Arris Surfboard SB6190 and my Router is the Asus RT-N66R. I am paying for 400mbs internet with spectrum which I was told I can get anywhere from 300-400 supported in my area. When I plug directly from computer to modem I get about 300 down and 25 up which is great and what I expected to get. However when I plug my Modem into my router then use an Ethernet cable from router to modem I get the same 25mb Upload but only 100 download. The Ethernet cable from Modem to Router is Cat7 and is the same one I used to plug into my computer. Is there any settings I should change in my router or is this just normal. I am not using WiFi just to make that clear its all through Ethernet cable.