I've got a 16X2 cable connectiona nd plugging my laptop direct to the cable modem i get 16Mb from both speakeasy.net and speedtest.net but plugged into the MT I only see about 3 or 5 Mb. I had an RB150 and replaced it with an RB750 but the same result. CPU usage is never over 10 or 15%.
I've tried disabling all the firewall rules but no change there. I;ve used both bridge group and switch port config for the local lan but same results.
Running 4.17 on the RB750 the RB150 was 3.30