Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem (White)

• Requires Cable Internet service
• Internet download speeds up to 343 Mbps and upload speeds up to 131 Mbps based on your Cable provider service
• Ideal for streaming HD Video and gaming on multiple devices at a time
• Rear panel color coded for ease of installation
• Gigabit port to connect with router or computer
• Docsis 3.0 with backward compatibility with 2.0 and 1.x
• Front panel, easy to read operational LEDs to indicate status and simplify troubleshooting

Swapped out my Comcast rental modem, was up and running in just a few minutes, and now I don't have to pay the $7 modem rental fee to Comcast. I'm provisioned for the 105/20 Mbps package and typically get 110/20.5 Mbps.

This modem can utilize up to 8 channels of downstream for a theoretical max speed of 343 Mbps whereas the Motorola SB6121 and other earlier/cheaper DOCSIS 3 modems can only utilize 4 channels maxing your download speeds out at 172 Mbps. Just something to think about if you plan on using this modem for a few years as speeds offered will inevitable increase.

Also, it *does* support IPv6 even though Comcast's page doesn't list it as certified yet. Motorola's data sheet specifically lists the SB6141 as IPv6 ready and tests with an Apple AirPort Extreme (v7.6.1) and MacBook Pro running 10.8 confirm this.

Update 2/4: Still working great without issue.

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after I tried and failed attempt to buy this modem from amazon (its ok amazon made up for it) I ended up buying it from another website. it works great. movie streaming is great.

1 important thing I have figured out is that if you use TWC they will try to sneak you. they will peg your speed at 10mb until you notice it and contact them then they will say everything looks normal on their end and you test your speed again and its fine or they blame your modem. when they fix the issue they will leave it for a day or 2 and limit your speed again. they do this because you used your own modem and not theirs. they will try to blame the modem but it magically starts working right when you call them out on it. they do this for 2 reasons. 1) so you don't notice they lowered your cap and when streaming movies or games are not working right they try to blame your modem and talk you into renting theirs. 2) so they can talk you into upgrading service with the new rented modem that they try to stick you with because your modem is "bad". I am not the only 1 that this has happened to in my area and suspect it is happening in other TWC areas too since the service itself isn't "area" controlled. if you have had this happen to you called them out on it and tell them you know what they are doing and will contact the BBB and FTC if it happens again. if this has happened to you please post a response to my review with at least "I" or "me too" I want to get a count of how many have had this happen by TWC.

like I said the modem itself is awesome. best modem I have ever had period.

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I bought this to replace the Arris 760 that Comcast provided for $7/mo. I ran Speedtest twice on the Arris, with d/l speeds of 13.05 and 18.62 Mbps. When I hooked up the SB6141 it gave me the self-install page, but I could not find my account number and wound up calling 877-761-5015 ext 2 anyway. They answered immediately and had me going in about 15 minutes, mostly spent waiting for Comcast and the modem to get in sync with each other.

I ran Speedtest a few more times, and got consistent speeds in the 25.5 Mbps range. Upload speeds were about the same (4.5 Mbps) on both modems, but it appears for now that I am getting noticeably better speeds and avoiding Comcast rental charges as well.

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They do not yet offer gigabit internet in my area but they (Time Warner) have started charging $4 a month for their modem/routers which were sub par anyway. Now I am not having to do reboots every few days (had on a vacation timer anyway) and I am ready when someone with more bandwidth comes knocking.

This lifehacker article led me to this modem and I am very happy with it

On the Time Warner approved list & I was on hold with the TW support folks for longer than it took to install. Just gave them the mac address after hooking it up and it was golden. Like I say don't have a bonded connection but do have the consistent 30 mbps down/ 5mbps up connection that I pay for.

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Has no problem on Comcast's 50 mbps / 10 mbps (DL/UL) connection. Small and a tad warm but nothing dangerous.

Would recommend.