Depends on Comcasts limits that they have set for that particular modem. Just because you have Docsis 2.0 modem doesn't mean the cable company is going to allow full bandwidth to be utilized over that protocol with that particular modem. They can regulate your bandwidth. My suggestion is if you are paying for 50mb download speeds and you are not receiving what you are paying for, then you need to have Comcast swap your modem out with a Docsis 3.0 compliant modem or you need to reduce the speeds you are paying for and keep the Docsis 2.0 (I think Docsis 2.0 speeds are maxed at 30-40meg but are generally throttled much lower to around 10-15meg max. Some cable companies won't say a thing to you about your modem being Docsis 2.0 because...