Switched to Ethernet and now Internet is a fraction of the speed

So I switched from coax to ethernet today so I could get rid of the actiontec router which was causing major NAT issues.  Good news is I no longer am having NAT issues.  Bad news is my internet is extremely slower.  My current setup is ONT> (100ft Cat6a cable)> Asus rt-n66u > Wifi.  If I hard wire in to the router my download speed is consistently a 9.5 mbps and upload anywhere from 7.5-9.5 mbps.  I am currently subscribed to 75/25.  With the coax I had 25-35 mbps dl speed and 20 mbps upload over wifi and that was ONt>Actiontec>Asus rt-n66u>Wifi. Anyone have any suggestions?  These speeds are pitiful