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Motorola SURFboard SB6121 DOCSIS 3.0 Cable Modem EXPIRED

TDMVP73 90,974 April 4, 2013 at 12:54 AM in Mail In Rebate (8) More Newegg Deals
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$55

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Promoted 04-04-2013 at 01:43 PM View Original Post
Newegg has Motorola SURFboard SB6121 DOCSIS 3.0 Cable Modem on sale for $74.99 - $20 Rebate = $54.99. Shipping is free. Thanks TDMVP73

Price Research: Our research indicates that Motorola SURFboard SB6121 DOCSIS 3.0 Cable Modem is $20 lower (26% savings) than the next best available price from a reputable merchant with prices ranging from $75 to $100. - Discombobulated

Original Post

Edited April 4, 2013 at 02:09 PM by widgit
Hey guys,

I didn't see this posted, so I thought I'd share.

MOTOROLA SB6121 SURFboard DOCSIS 3.0 Cable Modem - $54.99 AR Shipped @ Newegg.com
LINK [newegg.com]

Item Price: $74.99
$20 Mail-In Rebate [newegg.com]
AR Cost: $54.99

FREE Shipping

Limit 2 Per Household

Rebate is valid 04/04/13 to 04/10/13

OPTIONAL DEAL COMBO:
1. Add the Cable Modem [newegg.com] to your cart.
2. Add one FAR software title (e.g. Acronis [newegg.com]).

Grand Total: $109.99 (before rebate)

3. Apply Coupon Code: VALPAK10 in cart to take $10 off.

Final Total: $99.99 - $20 Rebate (Cable Modem) - $35 Rebate (FAR Software) = $44.99

211 Comments

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#61
Thanks OP, got this to stop paying TWC's stupid rental fee.
Reply Helpful Comment? 0 0
#62
Just got a SB6121 on Charter. Made a huge difference in internet speed and picture quality. Now Netflix and Amazon on my Roku loaded faster and maintain HD quality. DOCSIS 3 does make a difference. If you have a DOCSIS2 and your internet is over 20meg now is the time to change.
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#63
This modem is junk... give me $50 instead, I will put it to better use than you giving them $50... get the Ubee instead.. no problems and works out of the gate
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#64
Quote from Dacoycoy View Post :
The reason im getting this is to get rid of the lease $5/mon modem by the ISP. The docsis 2.0 gives me the down/up speed i paid for..... what do you mean " stay far far away from docsis 3.0 ?"
Very good reason to get OP's deal ( No more rental fees) and with the FAR software outstanding price.

However, if, you have a docsis 2.0 and you are getting speeds above what you are paying for stay with docsis 2.0.

http://forums.anandtech.com/showt...?t=2145569
Last edited by Dealzcat April 4, 2013 at 03:02 PM
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#65
My local provider just recently sold out to TWC and now I am paying rental fees. This is a good opportunity to BMOM
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#66
I currently have a DOCSIS 2.0 modem (Linksys CM100-RM) that I picked up for $27 back in '09 from New Egg. However Comcast in my area recently upgraded their "Blast!" package from 30Mbps to 50Mbps, and I'm not clear whether I am getting the full benefits of the upgrade on my current modem or if I need DOCSIS 3.0 to get the full bandwidth. Anyone know for sure what the max bandwidth I'd see on a DOCSIS 2.0 modem would be (I know for sure that 30Mbps is possible, but I'm not sure how much more).
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#67
Quote from sockyears View Post :
In 4 1. Looking for a wireless router to pair up with this modem, any recommendation?

Thanks.
i'll probably get flamed for endorsing any apple product, but if you want simplicity go with an apple airport express or extreme. refurbs can often be found for reasonably cheap (considering it is an apple product).

i have an extreme paired with this motorola modem and have been thrilled with how well it works.

had it set up with main network and separate guest network in less than 5 minutes from start to finish.
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#68
Quote from SDNick484 View Post :
I currently have a DOCSIS 2.0 modem (Linksys CM100-RM) that I picked up for $27 back in '09 from New Egg. However Comcast in my area recently upgraded their "Blast!" package from 30Mbps to 50Mbps, and I'm not clear whether I am getting the full benefits of the upgrade on my current modem or if I need DOCSIS 3.0 to get the full bandwidth. Anyone know for sure what the max bandwidth I'd see on a DOCSIS 2.0 modem would be (I know for sure that 30Mbps is possible, but I'm not sure how much more).
Check your speed
http://www.speedtest.net/
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#69
Quote from Parafly View Post :
Does a DOCSIS 3.0 modem make a difference if I'm on a 20mb down / 5mb up plan? or is this only necessary for very high speed connections?
If you're currently on a DOCSIS 2.0 modem, then no, it shouldn't make a significant difference as the modem isn't your bottleneck. At what point does the modem become the bottleneck, I'm not sure, but I consistently get well above 20Mbps on my DOCSIS 2 modem from several years ago.
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#70
Quote from Dealzcat View Post :
Check your speed
http://www.speedtest.net/
I'll try when I get home from work. My concern with doing a speed test is that it may come out to be under 50Mbps, but that doesn't tell me whether the bottleneck is my modem or congestion on my provider between myself and the speed test. Although if it does end up close to 50, I guess I can safely rule out the modem so it's still a good suggestion.
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#71
Quote from araczynski View Post :
not a rebate, its a $20 credit towards a future newegg purchase. bought a new 6141 on ebay for $70 instead.
? I see a rebate visa card
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#72
Quote from sklar View Post :
Indeed. Basically with a docsis 2.0 modem you're driving on a one lane (one channel) road both ways. If that channel becomes congested, you're stuck. With the 6121 and docsis 3, you get four down and four up, if your cable plant is provisioned for that many channels. With the 6141 you get an 8 lane highway down and 4 up. Very little chance of getting stuck on a congested channel, and much more consistency and quality of service.

Look at the results. Bottom two are with the 6121 and the performance was extremely variable. My service then was 25/3, but I usually got variable pings and variable performance. From the 3rd from the bottom up is a 6141. Rock solid no matter when I did a test. You can then see where comcast bumped my speed for free, and I'm seeing a pretty solid 35/5 since then. The good numbers are even more impressive when you consider that the last two weeks have been spring break for the local schools and everyone is sitting home whacking away at the internet, not sitting in school all day.

Both the 6121 and 6141 bonded 5 downstream and 3 upstream channels, but when I took the old 6121 to my ex wifes house across town, it only bonded 4 down and 1 up, so YMMV. In a year or so, everyone should have plenty of channels.

Do note that some ISP's, particularly time warner, are getting bashed for not updating the firmware on customer owned modems, and some really old 6121's and some newer 6141's that have been sitting around a while have older firmware that in some cases disconnects periodically. TW will blame your modem and then install theirs to show you that it works and its your fault. shake head Comcast updated my firmware on provisioning the modem. Motorola will not release firmware for end users, stating that its up to the ISP to provide that. Looking at the 1 star reviews on amazon and newegg, most of them are from TW customers.
It is worth noting that once you install a cable modem, the device is not yours. It belongs to your ISP until your contract with them expires or is terminated.

This has been the case saince the original DOCSIS standard came out. The firmware is always a custom version made by your ISP. Meaning that the firmware from one ISP is always different than another.

My ISP, Charter Communications uses a modified variant of DOCSIS 3 if you have a DOCSIS 3 modem. I would wager that most ISPs do this now. It allows them to ensure that it will be a disruptive device if you try the competition, and to pick and choose what features you actually get.

You absolutely cannot get a clear answer from the ISP about what revision or features they support. The people manning the phones usually know nothing and if they did know anything, they are paid to lie to you.

People, I am not trying to start an argument. Read the Wikipedia article on DOCSIS 3 and see what is required for the service to actually support it and you will likely see that most if not all ISPs in America do not actually support it.

My own ISP does not support IPv6, yet they claim to support DOCSIS 3. That is a contradiction. IPv6 is a feature of DOCSIS 3. (It was actually added to DOCSIS 2, but they never adopted that.)
https://en.wikipedia.org/wiki/DOCSIS

Still this is a great deal and I will have to scrape pennies together. I just dread the lies from the ISP about how they need to charge extra for IPv6 support. (They have not said that, but I expect that is the plan.)

Thank you OP. Repped!
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#73
I missed the amazon deal, Im still using the SB 5101 from comcast. All the comments are making me wish I had waited for the newer one to come on sale.
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#74
Quote from SDNick484 View Post :
I'll try when I get home from work. My concern with doing a speed test is that it may come out to be under 50Mbps, but that doesn't tell me whether the bottleneck is my modem or congestion on my provider between myself and the speed test. Although if it does end up close to 50, I guess I can safely rule out the modem so it's still a good suggestion.
If your on the new 50mb blast, your docsis 2.0 modem will be your bottleneck as the cm100 has a maximum transmission rate of 34 Mbps.

If you run a speedtest, most likely, you should be getting 30-33 like I am on the Linksys CM100. Am also on blast that got upgraded to 50 but waiting for these modems to hit sub 50 without rebates.
Last edited by RibeyeAndScotch April 4, 2013 at 03:05 PM
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#75
Quote from SDNick484 View Post :
I currently have a DOCSIS 2.0 modem (Linksys CM100-RM) that I picked up for $27 back in '09 from New Egg. However Comcast in my area recently upgraded their "Blast!" package from 30Mbps to 50Mbps, and I'm not clear whether I am getting the full benefits of the upgrade on my current modem or if I need DOCSIS 3.0 to get the full bandwidth. Anyone know for sure what the max bandwidth I'd see on a DOCSIS 2.0 modem would be (I know for sure that 30Mbps is possible, but I'm not sure how much more).
I'm in the same situation. My DOCSIS 2.0 routinely averages 37Mbs via my Netgear wireless router since the Blast upgrade.
I'm debating whether or not another 13 Mbps is reason enough to replace a perfectly working modem.
Last edited by Angsto2 April 4, 2013 at 03:01 PM
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