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I'm considering getting a new cable modem. Doing some research I found myself on Wikipedia: I'm wondering if it's worth the extra $30-40 for my home network to go ahead and get version 3.0 instead of 2.0.

The table on this page refers to number of channels that hardware must be able to support. Is this referring to my router and network card?

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migrated from May 16 '12 at 13:14

This question came from our site for system and network administrators.

marked as duplicate by Heptite, Kevin Panko, Moses, Mokubai, random Apr 12 '14 at 15:47

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My two cents: Don't get anything but a Surboard 6120, 6121, or 6220. You'll regret being cheap later if you get something else. – Chris S May 16 '12 at 13:13
up vote 3 down vote accepted

Well, it all depends on what your ISP supports. If your ISP is on DOCSIS 2, you will have no benefit in buying a DOCSIS 3 modem. The most DOCSIS 3 modems however are backwards compatible and will make you future proof.

Most ISPs will give your connection a certain profile (a speed limit if you will). So, that's something else to keep in mind.


  • DOCSIS 3: Future proof, might be overkill
  • DOCSIS 2: Cheaper, won't last 10 years.
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I've called them and they do support both v2 and v3. – Webnet May 16 '12 at 13:29
@Webnet You should certainly go for DOCSIS 3.0 if your ISP supports it. – paradd0x May 16 '12 at 13:40
Thanks for the feedback - I decided on Motorola SB6121 SURFboard DOCSIS 3.0 – Webnet May 16 '12 at 14:55
@Webnet - You need to ask if the service YOU are getting suports both. I know in the case of my ISP only the highest teir supports DOCSIS 3.0 so if you were on the budget plan you would gain very little out of a DOCSIS 3.0 modem. – Ramhound May 16 '12 at 15:02

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