I was renting a modem from Comcast for $4 per month which really was horrible. The modem would crash, reboot, not work, etc... I spoke to some Comcast tech's on Twitter and they recommended I go and buy this modem since it was not yet being distributed by them in my area. Voila, off to Amazon I went.
I purchased the modem, it arrived the next day. I turned everything off....router, computer, etc. The setup was as follows:
A. Plug cable into new modem.
B. Plug ethernet cable from modem to your computer (first time only).
C. Power up modem.
D. Power up computer.
E. For Comcast - Web page comes up that allows you to change your modem.
F. Enter some details....ie. your account number, etc.
G. DONE....shutdown modem, and plug ethernet cable to Router.
H. Enjoy DOCSIS 3.0
I have had this thing for a few weeks now and it works perfectly well on a daily basis. We are actually getting what we pay for...which was not the case with the old junk that comcast provided. We are getting about 60mbps down and 12mbps up...on a good day.
Motorola has an excellent modem again.. Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem
I bought this modem the other day because I felt my old SB5101 modem was not optimized for speed. I have a regular DOCSIS 2.0 service through Comcast. The modem made a huge impression on me after it was installed. The download and upload increased around 20 percent. The amazing thing is that this modem squeeze extra bandwidth out of your existing service (weather you have a standard basic megabyte connection or the newer DOCSIS 3.0 service high speed connection). The noticeable difference was the latency speed of the connection. When I click on a link on a web page, the page loads up as soon as the link is clicked. My old SB5101 modem would take a few extra milliseconds to load. What does this mean? If you play video games like Halo 3 via X-box or Call of duty, you will have a reaction time advantage against your competition. The clear negative of this product is that it takes longer to boot-up. If you power cycle the modem or if your internet service provider resets the modem, it will take two minutes to restart. It will take Comcast longer to recognize the modem when you call in to give the Mac address because when they reset the modem remotely, it will take two minutes for the modem to initialize. Once it is online it performs flawlessly. Anyone that buys this modem will benefit from the extra tweaks it has regardless if the are using a basic or super high speed internet service.
As I understand it, this is a great modem to use if you have a very expensive, extremely high speed internet package. The reason for this is that it has bonded channels technology that enables you to get more bandwidth (at high speeds) than the Motorola Surfboard 5120 or 5101. So if you have the top of the line internet package, and a very fast computer, and if the cable internet in your area supports DOCSIS 3.0, this thing could work screaming fast for you.
I do not have screaming fast internet, although my computer is pretty bleeding fast. I can't afford that kind of cost for a monthly subscription, because it is a constant and forever drain of a lot of money, and I don't earn that much money where I can do that.
I am located in the Phoenix, Arizona area, and have the $40/month Preferred internet package. My downstream bandwidth varies a lot by the time of day, it ranges between 13Mbps all the way up to about 23Mbps when almost everyone else is in bed sleeping.
My upstream bandwidth is capped real low, as with most consumer internet packages, so it hardly varies at all. It's almost always the same, at about 1Mbps.
If you want an accurate test of your internet bandwidth, do not use the main bandwidth testing sites. Their tests are way too short in duration and give you an extremely exaggerated notion of your top speeds. Go to testmy dot net and use the largest size tests they will allow you to.
Before purchasing this modem from an unnamed extremely large local retailer, I had read lots and lots of reviews saying that this modem dramatically improved the speed of relatively slow connections. I tested my bandwidth both before and after very thoroughly, both upstream and down. In the before part of my tests, I was using a Motorola Surfboard 5120. I saw absolutely no significant difference in either my upstream or downstream speeds after switching in the newer model. The reason this happened is because the 6120 is designed with the bonded channel DOCSIS 3.0 technology that provides you with more bandwidth *in very high speed applications only*.
So, if you have a bleeding fast internet connection, and your internet service provider supports DOCSIS 3.0 in your area, then you could see quite a large improvement in your bandwidth from this modem, according to everything I have read and heard. However, if like me, you cannot afford that speed of connection, you would be much better off saving your money and either keeping your Motorola Surboard 5120 or 5101, or getting one of those instead, since they are less expensive. - Comcast - Sb6120 - Surfboard - Motorola'
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