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Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem

by Motorola
4.4 out of 5 stars  See all reviews (1,688 customer reviews)

List Price: $99.99
Price: $85.99 & FREE Shipping. Details
You Save: $14.00 (14%)
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  • Designed to provide a cost effective, next generation technology to offer a high speed residential or commercial service tier
  • User-friendly online diagnostics and bonded channel status page
  • Features a 10/100/1000Base-T Gigabit Port for incredible wired network speeds
  • Capable of downloading up to 2000 times faster than 56k analog phone modems; up to 4 times faster than DOCSIS 2.0 broadband
  • Intuitive, easy to read front panel operational status LEDs
There is a newer model of this item:
Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem - Retail Packaging - White Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem - Retail Packaging - White 4.6 out of 5 stars (245)
$79.99
In Stock.

Frequently Bought Together

Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem + Medialink - Wireless N Broadband Router - 150 Mbps - 2.4GHz - 802.11n w/ Internal Antenna
Price for both: $135.98

Buy the selected items together


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  • Buy Used and Save: Get the "Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broad..." for a lot less. Amazon Warehouse Deals offers deep discounts on open-box or used versions of this item. Products are eligible for Amazon's 30-day returns policy and Prime or Super Saver Shipping. See all Used offers from Amazon Warehouse Deals.

Technical Details

  • Brand Name: Motorola
  • Model: 545101-011-00
  • Hardware Platform: Pc
  • Width: 0.00 inches
  • Height: 0.00 inches
  See more technical details

Product Details

  • Product Dimensions: 9.5 x 7 x 2.8 inches ; 1 pounds
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B001UI2FPE
  • Item model number: 545101-011-00
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (1,688 customer reviews)
  • Amazon Best Sellers Rank: #436 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: April 28, 2009

Product Description

From the Manufacturer

Ultra-fast Internet at your fingertips – NEW lightning fast technology lets you surf up to 4x faster than traditional cable modems.
The Motorola SURFboard SB6120 eXtreme Cable Modem unleashes the next wave of broadband technology at exceptional speed. The SB6120 is up to 4 times faster than DOCSIS® 2.0 broadband cable modems making it capable of reaching data rates up to 150 Mbps. That makes gaming, shopping, downloading, working, high-quality voice and video conferencing, and peer-to-peer networking applications — far more realistic, faster, and efficient than ever before. The SB6120 delivers your complete personal media experience, at lightning-fast broadband speed. So what are you waiting for?




Motorola SURFboard® eXtreme Cable Modem


Easy to Install, Activate, and Use.


Delivers a realistic gaming experience – watch as games come to life
  • Next Generation DOCSIS® 3.0; backwards compatible to DOCSIS 2.0
  • Up to 4x faster than DOCSIS 2.0 cable modems
  • Enhance your interactive gaming experience
  • Easy to install and simple to use


  • Watch as games come to life.



    Highlights
    • Capable of downloading up to 2000 times faster than 56k analog phone modems
    • Capable of downloading up to 4 times faster than DOCSIS 2.0 broadband cable modems
    • DOCSIS® 3.0 Certified
    • Enables a myriad of advanced multimedia services:
    • - Access real-time online games; new heights in realism and speed
    • Faster music downloads; one song or the entire album
    • Share digital photos, home movies and other multimedia effortlessly over the Internet
    • Download high-definition movies to your PC or watch as streaming media
    • Windows®, Macintosh®, and UNIX® compatible
    • Supports Advanced Encryption Services for data, as activated by your operator
    • Features a 10/100/1000Base-T Gigabit Port for incredible wired network speeds: enjoy lag-free network gaming and faster file transfers
    • Intuitive, easy to read front panel operational status LEDs
    • Use your current Internet Browser
    • No additional software required
    • Slim design saves desk space
    • 2-year limited warranty


    What’s in the Box
    Inside the Box - Motorola SB6120 SURFboard eXtreme Cable Modem,Quick start guide,Installation CD-ROM,Ethernet cable,Power adapter and cord,Install sheet,Warranty card

    Product Description

    Ultra-fast Internet at your fingertips - NEW lightning fast technology lets you surf up to 4x faster than traditional cable modems. The Motorola SURFboard SB6120 extreme Cable Modem unleashes the next wave of broadband technology at exceptional speed. The SB6120 is up to 4 times faster than DOCSIS 2.0 broadband cable modems making it capable of reaching data rates up to 150 Mbps. That makes gaming, shopping, downloading, working, high-quality voice and video conferencing, and peer-to-peer networking applications - far more realistic, faster, and efficient than ever before. The SB6120 delivers your complete personal media experience, at lightning-fast broadband speed.


    Customer Reviews

    This modem is great - very easy to install. RJG  |  410 reviewers made a similar statement
    If it continues to work this well over time, I will say it was well worth the money spent. Alice Dee  |  141 reviewers made a similar statement
    Most Helpful Customer Reviews
    338 of 349 people found the following review helpful
    5.0 out of 5 stars PERFECTION, for Docsis 3.0 Installations October 24, 2009
    Amazon Verified Purchase
    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..
    Was this review helpful to you?
    304 of 334 people found the following review helpful
    4.0 out of 5 stars Great for gamers with bleeding fast internet September 30, 2009
    By Ferenc
    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.
    Was this review helpful to you?
    44 of 46 people found the following review helpful
    5.0 out of 5 stars Comcast Customer Review/Gamer Review January 22, 2011
    Amazon Verified Purchase
    As a Comcast Customer, I'm sure I wasn't the only person annoyed by the modem rental increase at the beginning of the year (2011). I never really thought about it before, but I was paying more per year to rent an old DOCSIS 2.0 modem Comcast gave me (which had likely been in countless homes before my own) than I'd spend one time to purchase my own. So, I decided to ditch the rental and own.

    At first, I thought I'd just buy what I already had: a Motorola SURFboard SB5120 DOCSIS 2.0. So glad I didn't! Instead I shelled out a bit more money and picked up the Motorola SB6120 SURFboard DOCSIS 3.0.

    I read the reviews on Amazon prior to purchase, but was skeptical about the claims of increased speed with this modem. It didn't make sense to me, as I'm paying for an internet package with certain limitations on download/upload speed. It only seemed logical that better technology wouldn't be able to surpass limitations the package I pay for has in place. But in the end, what drove me to choose the SB6120 over the SB5120 was the idea of future-proofing; if I'm paying for it, I might as well get the better option.

    Once I had the SB6120 running as my own modem, however, I was pleasantly surprised. My Comcast Internet package deal, which has not changed throughout my recent modem replacement, is as follows: Performance 12 Mbps download/2 Mbps upload with powerboost. Also, my area supports DOCSIS 3.0, so my package, utilizing a DOCSIS 3.0 modem, would automatically increase to 15/3 with powerboost. I took some speed tests (speedtest.net) before and after the new modem, and here's what I got on average:

    SB5120 DOCSIS 2.0 Modem:
    12 Mbps/2 Mbps

    SB6120 DOCSIS 3.0 Modem:
    20 Mbps/3 Mbps

    Now, is this definitive proof that the SB6120 performs miracles with your internet speed? To many, I'm sure it's debatable. I've read a lot online about how people similar to me (similar internet packages) are getting increased speeds with a DOCSIS 3.0 modem, but there's always someone who quickly dismisses such claims as lies (they typically site powerboost as the cause for such "speed increases").

    For me, I don't know. All I can say is that, with my set-up (note: I'm a gamer and run a PS3), I now have a faster internet connection with my new DOCSIS 3.0 modem, which mean the games I play online are blazing fast. Perhaps the old 2.0 was junk, perhaps something else, but the one thing I know for certain is that all I did was update my modem. I'm very satisfied with this purchase.

    EDIT: As of 01/22/11, there have been no issues with modem. Have not had to powercycle or reset modem for any reason. Setting up with Comcast was a bit of a pain--was transferred to the wrong department twice, and the directions I received from the technician I spoke with were unclear, but since successfully completing set-up of modem, have had no issues whatsoever.

    EDIT: As of 01/31/11: Modem went offline for at least 11 hours after 5 days of uninterrupted connection (occurred on 01/26). Location: Colorado. Recently read 2 other reviews by Comcast customers using this modem in Colorado, and they are not happy. Other than being offline on the 26th for several hours, no other issues to date. Previous modem would also go offline for hours on occasion, so I believe it has to be my connection. Still happy with the equipment. It can work in Colorado.

    EDIT: As of 03/12/11: This will be my last update unless the modem malfunctions. Since January 26, 2011, no issues whatsoever to report. I have read that modem may have issues being plugged into a powerstip, and that instead modem should be plugged directly into wall outlet. Modem was actually plugged into wall outlet on the 26th when only issue occurred; since then, have had unit plugged into powerstrip, and again, no issues.

    Lastly, read that increase in speed may be due to internet provider's lax perameter's with service during update to DOCSIS 3.0. Apparently, once conversion is complete and Comcast has a better handle on things, download/upload speeds should be more strictly enforced, thus: you get what you pay for and even this unit won't work miracles with speed increases. We'll see.

    Note: This modem was selling for $75 new on Amazon back in January. Sorry to see that they've jacked the price up so high, but glad I bought mine when I did.
    Was this review helpful to you?
    Most Recent Customer Reviews
    5.0 out of 5 stars Great alternative to Comcast's generic rental
    This is a great modem to own when you don't want to pay Comcast that ridiculous rental fee for theirs. It has been extremely reliable. My 30Mb connection has never had any issues. Read more
    Published 1 day ago by Jed Ivie
    5.0 out of 5 stars If you can still find this model, grab it!
    There have been many reports of the newer model getting quite warm. Motorola packed a lot of electronics in a tiny case. This model is a little larger, and has plenty of air flow. Read more
    Published 7 days ago by David W. Irwin
    5.0 out of 5 stars Really like this product
    If your in need of an upgraded modem then this should do the job. I really don't have to much to say but I am delighted with how it performs and would get another if needed.
    Published 8 days ago by Top Shogun
    5.0 out of 5 stars Perfect buy
    Very good modem. Solid built, reliable.
    Simple installation - you hook it up to your cable, call 800-comcast and ask them to provision it. Read more
    Published 9 days ago by 3ABXO3
    5.0 out of 5 stars No problems
    Used this with Comcast so that we wouldn't have to rent one from them for about $8/month. Works. My service doesn't utilize the full speed capability, but I have no problems with... Read more
    Published 12 days ago by M Roberts
    1.0 out of 5 stars Did not work
    I bought this item and it did not work. I had Comcast serviceman to come and confirmed it did not work.
    Published 15 days ago by David w
    5.0 out of 5 stars Great Modem
    This modem is top of the line, pay the money and just get it and you will save money/save a headache in the long run.
    Published 18 days ago by alex freemon
    5.0 out of 5 stars Fast
    Thie baby is fast, really fast at the time i bought, still faster than any AT&T or Cable free modem.
    Published 18 days ago by Anh Nguyen
    5.0 out of 5 stars Love It
    We purchased this so we wouldn't have to pay the rental fees and wanted the most out of our internet from Xfinity. Read more
    Published 19 days ago by Alexander
    5.0 out of 5 stars Works great! No breaks in data, good speed.
    My old modem needed to be reset fairly often, had slow speeds, and data would hang up just long enough to disconnect me from online multiplayer games. Read more
    Published 21 days ago by Jeremy L Connin
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    Topic From this Discussion
    SB6180 Release Date
    Why? They sell other business models
    Jun 13, 2010 by fact checker |  See all 41 posts
    Flashing orange "Link" light???
    According to the manual, the link light always blinks to indicated data transfer. The light color indicates the speed of the device connected to the modems ethernet port. Amber is 10 / 100 Mbps, blue is 1000Mbps. Mine is connected to my old WRT54G router, which only has a 100 Mbps WAN port,... Read more
    Jul 8, 2010 by Robert Maass |  See all 26 posts
    Best wireless router to use with w/Motorola SB6120 and Comcast Service?
    use any wireless n router.
    May 14, 2011 by Jason Hodges |  See all 17 posts
    Time Warner
    This works FINE with TWC SD, I just installed the modem yesterday.

    50% speed increase over what I was seeing (now its 30down/1.8 up, used to be 20down/1.2up on old SB4200 modem). If the tech guy you're talking to doesn't know how to set it up, have your issue escalated to a senior tech -- I had... Read more
    May 25, 2010 by Brian S. Ferguson |  See all 20 posts
    help! modem only supports internet but not phone?
    just use ooma and save money
    Nov 18, 2012 by Morning |  See all 2 posts
    Comcast support of DOCSIS 1?
    Yep. And a DOCSIS 2 or 3 modem should be faster for you as well.
    Nov 11, 2010 by B Stout |  See all 8 posts
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