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Motorola SURFboard SB5101U

Motorola SURFboard SB5101U
alaAverage 4.3

114 reviews

Apr, 2018

alaTest has collected and analyzed 114 reviews of Motorola SURFboard SB5101U. The average rating for this product is 4.3/5, compared to an average rating of 4.2/5 for other Modems for all reviews.

On average, users rate this product 86/100.

Review analysis

(Based on 114 reviews)

User Reviews  


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Consumer review ( review summary for Motorola SURFboard SB5101U


alaTest has collected and analyzed 3 user reviews of Motorola SURFboard SB5101U from The average user rating for this product is 4.7/5, compared to an average user rating of 4.1/5 for other Modems on

100% of the reviews on give this product a positive rating.

This summary is based on the products: Motorola Sb5101u Surfboard Cable Modem Sb 5101 UMotorola Sb5101u Surfboard Cable Modem Sb 5101 U

Apr, 2018

Consumer review (

Just a modem


Just a modem



May, 2015

Consumer review (

It works.


Just plug it in, connect the cable line and the ethernet cable. Then call your internet provider and read them the number on the bottom of the modem. This modem is good enough for 99% of cable internet customers out there.

It runs nice and cool, and should last you a very long time. You don't have to pay Time Warner/Comcast those annoying cable rental fees anymore. This is one of the lower cost cable modems available

Supposedly not fast enough to handle the highest cable internet tiers out there

Aug, 2014

Consumer review (



Got this modem rather then paying my provider (TW) a monthly fee for one. It took over any hour on the phone with them to set up (there fault, not the modems), but once set up this device has been worry free and reliable.

No problems in over a year of ownership, offers speeds that meet gaming/streaming demands without any problems. Great Price

Faster modems existing depending on your needs

Jul, 2014

Consumer review (

Works as expected


Works, no issues to isp speed 20/2 (when they deliver it)

Screw time warner for making me buy this instead of 'renting' theirs

May, 2013

Consumer review (

Does not work with Windows 8


Small, inexpensive

After contacting Motorola, I learned that this unit is not compatible with Windows 8 when using the USB connection. The description says it is compatible with Windows, but Windows 8 is the current version and the SB5101U is not compatible ; The earlier...

Apr, 2013

Consumer review (

Great purchase for the price


So far, so good. The intallation was very simple and the modem has been working perfectly. It has replaced the provided modem given to me by Comcast (Xfinity) which they were charging me $7.00 each month to use. Their model was old and out-dated, so...

Feb, 2013

Consumer review (

It Just Works


TWC was great to work with swapping over to my cable modem. My TWC SURFboard was 10 yrs old when I pulled it out to send back to TWC. Hope to get the same from this one.

No fuss setup. Plugged it in, called my ISP and they completed the change. Saves me from paying them 5.00 /mo for a 10 yr old cable modem


Feb, 2013

Consumer review (

good modem


all my new egg products seem to work ok

good price plus faster a bit than charter cable modem same kind too

none so far

Jan, 2013

Consumer review (

works great


this modem works better than the modem that i had from the cable company

Jan, 2013

Consumer review (

Awesome Router


Would deff. recommend this product.

Works great for gaming, streaming movies, and regular internet surfing. Easy to setup; All I had to do was call ISP and provide MAC address and it worked right away

None yet

Dec, 2012

Product Specifications

Riding the Internet wave just gets better and better. Introducing Motorola's new SURFboard SB4100 cable modem. With software upgrades accessible over the network and USB network connectivity, users no longer need to purchase additional software or open their PC to install a standard Ethernet card. The SB4100 offers both Ethernet and USB interface connectivity to help ensure compatibility with almost any PC or Macintosh network-ready computer system. What's more, a front panel stand-by switch has been added for additional end-user security. It disconnects the USB and Ethernet connection to the CPE without disconnecting the cable modem from the RF network, providing security, flexibility and performance. The SB4100 includes all of the enhanced features of previous SURFboard cable modems, including: incredible speed, high-performance processors, advanced RF design, operator-friendly diagnostics, and top-notch field reliability.

Dimensions & Weight



Compatibility:PC / Mac / Unix/Unix / Mac / PC
Packaged Quantity:1
Product Line:Motorola SURFboard


Connectivity Technology:Wired
Enclosure Type:External
Interface Type:Hi-Speed USB / Fast Ethernet/USB
Max Transfer Rate:38Mbps
Protocols & Specifications:DOCSIS 1.1 / DOCSIS 2.0
Type:Cable modem


Type:Network adapter/None