smorizio :
are you plugged into the modem itself?? if you are look at the modem and google it info on line. most high speed cable modems need to be newer docis 3.0 that does cable bonding. if it a dsl modem with dsl it depends on your phone line and distance from the the phone company equipment. if your using a router between the modem and pc. you need a n card that does 300 or more speed and a n router to see fast speeds from a wifi set up. also make sure no ones leaching your bandwith. turn on a wpa password.
hi i have a Arris TG852 which i believe is docis 3.0, i am indeed connected to the modem, and i believe i have a wpa password