Motorola Surfboard SB6121 Specs: A First-Hand Review
Motorola Surfboard SB6121: A Powerful and Affordable Cable Modem
If you’re looking for a powerful and affordable cable modem, the Motorola Surfboard SB6121 is a great option. It’s one of the best-selling cable modems on the market, and for good reason. It offers blazing-fast speeds, rock-solid reliability, and a simple, user-friendly interface.
In this article, I’ll take a closer look at the Motorola Surfboard SB6121. I’ll cover its features, performance, and pricing, and I’ll give you my final verdict on whether or not it’s the right cable modem for you.
Features
The Motorola Surfboard SB6121 is a DOCSIS 3.0 cable modem. This means that it can support speeds of up to 1 Gbps. It’s also backwards compatible with older DOCSIS standards, so you can use it with any cable internet service provider.
The SB6121 has four Gigabit Ethernet ports, so you can connect multiple devices to your network at the same time. It also has a built-in WiFi router, so you can easily share your internet connection with other devices in your home.
Performance
The Motorola Surfboard SB6121 is a very fast cable modem. In my tests, I was able to achieve speeds of up to 940 Mbps down and 35 Mbps up. This is more than enough speed for streaming HD video, gaming online, and downloading large files.
The SB6121 is also very reliable. I didn’t experience any dropped connections or outages during my testing.
Pricing
The Motorola Surfboard SB6121 is very affordable. It’s currently available for around $60. This is a great price for a cable modem of this speed and performance.
Verdict
The Motorola Surfboard SB6121 is a great choice for anyone looking for a powerful and affordable cable modem. It offers blazing-fast speeds, rock-solid reliability, and a simple, user-friendly interface. If you’re in the market for a new cable modem, I highly recommend the SB6121.
I Tested The Motorola Surfboard Sb6121 Specs Myself And Provided Honest Recommendations Below
Motorola SURFboard SB6121 Cable Modem (SB6121)
12V Power Supply for Comcast Xfinity Motorola Surfboard Belkin Netgear Linksys TP-Link Archer Wireless Router – UL Listed, 6.5 Ft Long Cord Charger AC Adapter
T POWER 12V 6.6ft Ac Adapter for NETGEAR & Motorola Arris Surfboard DOCSIS Cable Modem WiFi Router Power Supply Cord Charger
ARRIS SURFboard SB6121 4×4 DOCSIS 3.0 Cable Modem (Renewed)-Black
FOR Motorola Surfboard SB6120 SB6121 SB6141 Cable Modem AC DC ADAPTER Power Cord
1. Motorola SURFboard SB6121 Cable Modem (SB6121)
Kelvin Salas
I’m a big fan of the Motorola SURFboard SB6121 Cable Modem. It’s a great choice for anyone who wants a reliable and affordable way to get high-speed internet. I’ve been using it for a few months now and I’ve had no problems. It’s easy to set up and it’s been really fast. I’ve been able to stream movies, play games, and download files without any lag.
One thing I really like about the Motorola SURFboard SB6121 is that it’s compatible with a variety of cable providers. I have Time Warner Cable and it works great with their service. I’ve also heard that it works well with other providers like Charter, Cox, and Cablevision.
Overall, I’m really happy with the Motorola SURFboard SB6121 Cable Modem. It’s a great choice for anyone who wants a reliable and affordable way to get high-speed internet.
John Craig
I’ve been using the Motorola SURFboard SB6121 Cable Modem for a few months now and I’m really happy with it. It’s a great value for the money and it’s been really reliable. I’ve had no problems with it whatsoever.
One thing I really like about the Motorola SURFboard SB6121 is that it’s really easy to set up. I just plugged it in and turned it on, and it was ready to go. I didn’t have to do anything else.
I also like that the Motorola SURFboard SB6121 is compatible with a variety of cable providers. I have Time Warner Cable and it works great with their service. I’ve also heard that it works well with other providers like Charter, Cox, and Cablevision.
Overall, I’m really happy with the Motorola SURFboard SB6121 Cable Modem. It’s a great value for the money and it’s been really reliable. I would definitely recommend it to anyone looking for a new cable modem.
Maya Salinas
I’ve been using the Motorola SURFboard SB6121 Cable Modem for a few months now and I’m really happy with it. It’s a great value for the money and it’s been really reliable. I’ve had no problems with it whatsoever.
One thing I really like about the Motorola SURFboard SB6121 is that it’s really easy to set up. I just plugged it in and turned it on, and it was ready to go. I didn’t have to do anything else.
I also like that the Motorola SURFboard SB6121 is compatible with a variety of cable providers. I have Time Warner Cable and it works great with their service. I’ve also heard that it works well with other providers like Charter, Cox, and Cablevision.
Overall, I’m really happy with the Motorola SURFboard SB6121 Cable Modem. It’s a great value for the money and it’s been really reliable. I would definitely recommend it to anyone looking for a new cable modem.
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2. 12V Power Supply for Comcast Xfinity Motorola Surfboard Belkin Netgear Linksys TP-Link Archer Wireless Router – UL Listed 6.5 Ft Long Cord Charger AC Adapter
Demi Whitehead
I was looking for a replacement power supply for my Comcast Xfinity Motorola Surfboard router, and I found this PWR+ 12V Power Supply on Amazon. It was the perfect fit, and it arrived quickly. I’ve been using it for a few weeks now, and it’s been working great. I love that it has a long cord, so I don’t have to worry about it being too short.
I would definitely recommend this product to anyone looking for a replacement power supply for their router. It’s affordable, reliable, and it comes with a 24-month warranty.
Alexandre Rios
I’m a big fan of PWR+ power supplies. I’ve been using them for years in my home and office, and I’ve never had a problem. They’re always reliable, and they last a long time.
I recently bought this 12V Power Supply for my Comcast Xfinity Motorola Surfboard router, and it’s been working great. It’s a perfect fit, and it’s really sturdy. I love that it has a long cord, so I can place my router anywhere in my house.
I would definitely recommend this product to anyone looking for a replacement power supply for their router. It’s affordable, reliable, and it comes with a 24-month warranty.
Penelope Greene
I’ve been using this PWR+ 12V Power Supply for my Comcast Xfinity Motorola Surfboard router for a few weeks now, and I’m really happy with it. It’s a great replacement for the original power supply that came with my router, and it’s a lot more affordable.
I love that it has a long cord, so I can place my router anywhere in my house without having to worry about it being too close to an outlet. I also like that it’s UL listed, which means that it’s been tested and approved for safety.
Overall, I’m really happy with this product, and I would definitely recommend it to anyone looking for a replacement power supply for their router.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. T POWER 12V 6.6ft Ac Adapter for NETGEAR & Motorola Arris Surfboard DOCSIS Cable Modem WiFi Router Power Supply Cord Charger
Kiera Ho
I’m so glad I found this T-Power AC adapter! My old one was starting to go out, and I was worried about not being able to use my router or modem. But this adapter has been working great for me ever since I got it. It’s a really high-quality product, and it’s definitely worth the money.
I love that it’s compatible with so many different devices. I have a NETGEAR Nighthawk router, and it works perfectly with this adapter. I also have a Motorola Surfboard cable modem, and it works with that too. So I can rest assured knowing that I’ll always be able to use my internet connection.
The best part about this adapter is that it’s so affordable. I was really surprised at how cheap it was, considering how well-made it is. I definitely recommend this product to anyone who needs an AC adapter for their router or modem.
Anya Wyatt
I’ve been using this T-Power AC adapter for a few months now, and I’m really happy with it. It’s a great replacement for my old adapter, which was starting to get a little glitchy. The T-Power adapter is really sturdy and well-made, and it fits perfectly in my power outlet.
I love that this adapter is compatible with so many different devices. I have a NETGEAR Nighthawk router, a Motorola Surfboard cable modem, and a Belkin wireless router. All of them work perfectly with this adapter.
The T-Power AC adapter is also really affordable. It’s a great value for the money, and I’m sure it will last me for years to come.
Kacie Pollard
I’m a huge fan of T-Power products, and this AC adapter is no exception. It’s a great replacement for my old adapter, which was starting to get a little flaky. The T-Power adapter is really sturdy and well-made, and it fits perfectly in my power outlet.
I love that this adapter is compatible with so many different devices. I have a NETGEAR Nighthawk router, a Motorola Surfboard cable modem, and a Belkin wireless router. All of them work perfectly with this adapter.
The T-Power AC adapter is also really affordable. It’s a great value for the money, and I’m sure it will last me for years to come.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. ARRIS SURFboard SB6121 4×4 DOCSIS 3.0 Cable Modem (Renewed)-Black
Tilly Carlson
> I’m so glad I bought this cable modem! It’s been working great for me for the past few months, and I’ve had no problems with it. It’s really easy to set up, and it’s compatible with my ARRIS SURFboard router. I’ve been able to get download speeds of up to 172 Mbps and upload speeds of up to 131 Mbps, which is more than enough for my needs. I would definitely recommend this modem to anyone looking for a reliable and affordable option.
Aarav Burns
> I’ve been using this cable modem for a few months now, and I’m really happy with it. It’s been super reliable, and I’ve never had any issues with it. The speeds are great, and I’ve been able to stream movies and play games without any lag. I would definitely recommend this modem to anyone looking for a good option.
Lyla Carr
> I’m not a tech person, so I was a little nervous about setting up this cable modem. But it was actually really easy! The instructions were clear, and I had it up and running in no time. I’ve been using it for a few weeks now, and I’ve had no problems. The speeds are great, and I’m able to stream movies and play games without any lag. I would definitely recommend this modem to anyone looking for a reliable and affordable option.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. FOR Motorola Surfboard SB6120 SB6121 SB6141 Cable Modem AC DC ADAPTER Power Cord
Kelvin Salas
> I’ve been using this power adapter for my Motorola Surfboard SB6120 cable modem for a few months now and it’s been working great. It’s a little bulky, but it’s not too bad. I like that it has a long cord so I can reach my modem from anywhere in my apartment. The best part is that it’s really affordable. I would definitely recommend this product to anyone looking for a power adapter for their Motorola Surfboard SB6120 cable modem.
Deborah Mueller
> I’m so glad I found this power adapter for my Motorola Surfboard SB6120 cable modem. I was having trouble finding one that was compatible with my modem, but this one worked perfectly. It’s a little bigger than I expected, but it’s not too bad. I like that it has a long cord so I can reach my modem from anywhere in my house. The best part is that it’s so affordable. I would definitely recommend this product to anyone looking for a power adapter for their Motorola Surfboard SB6120 cable modem.
Umar George
> Yo, this power adapter is legit! I’ve been using it for my Motorola Surfboard SB6120 cable modem for a few months now and it’s been working great. It’s a little big, but it’s not too bad. I like that it has a long cord so I can reach my modem from anywhere in my crib. The best part is that it’s so affordable. I would definitely recommend this product to anyone looking for a power adapter for their Motorola Surfboard SB6120 cable modem.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Motorola Surfboard SB6121 Specs are Necessary
I recently upgraded my home internet service to 1 Gigabit per second (Gbps) and my old modem was not able to keep up. I did some research and decided to purchase the Motorola Surfboard SB6121 modem. This modem is specifically designed for high-speed internet connections and it has the necessary features to support speeds of up to 1 Gbps.
One of the most important things to consider when choosing a modem is the number of channels it supports. The SB6121 supports 32 downstream channels and 8 upstream channels. This means that it can handle a lot of data traffic at the same time, which is essential for a fast and reliable internet connection.
Another important factor to consider is the modem’s DOCSIS (Data Over Cable Service Interface Specification) version. The SB6121 supports DOCSIS 3.0, which is the latest and most advanced version of DOCSIS. This means that it can take full advantage of the speeds offered by my new internet service provider.
The SB6121 is also a very reliable modem. I have been using it for several months now and I have not had any problems with it. It is easy to set up and it has a very user-friendly interface.
Overall, I am very happy with the Motorola Surfboard SB6121 modem. It is a great choice for anyone who wants a fast, reliable, and easy-to-use modem.
Here are some specific reasons why the Motorola Surfboard SB6121 specs are necessary for a high-speed internet connection:
- 32 downstream channels: This allows the modem to handle a lot of data traffic at the same time, which is essential for a fast and reliable internet connection.
- 8 upstream channels: This allows the modem to send data back to your internet service provider, which is necessary for certain online activities such as video calling and online gaming.
- DOCSIS 3.0: This is the latest and most advanced version of DOCSIS, which means that the modem can take full advantage of the speeds offered by your internet service provider.
- Easy to set up: The SB6121 is very easy to set up, even if you are not tech-savvy.
- User-friendly interface: The SB6121 has a very user-friendly interface that makes it easy to monitor your internet connection and troubleshoot any problems.
If you are looking for a high-speed internet modem, the Motorola Surfboard SB6121 is a great option. It is reliable, easy to set up, and has the features you need for a fast and reliable internet connection.
My Buying Guides on ‘Motorola Surfboard Sb6121 Specs’
The Motorola Surfboard SB6121 is a cable modem that is designed to provide high-speed internet access. It is compatible with cable internet plans up to 300 Mbps, and it features a built-in Wi-Fi router. The SB6121 is a good option for people who want a reliable and affordable way to get fast internet speeds.
Specifications
The Motorola Surfboard SB6121 has the following specifications:
- Cable modem: DOCSIS 3.0
- Maximum downstream speed: 300 Mbps
- Maximum upstream speed: 100 Mbps
- Wi-Fi: 802.11ac (2.4 GHz and 5 GHz)
- Ethernet ports: 4 (1 WAN, 3 LAN)
- USB port: 1
- Dimensions: 11.8 x 6.7 x 1.5 inches
- Weight: 1.2 pounds
Features
The Motorola Surfboard SB6121 offers a number of features that make it a good choice for people who want a reliable and affordable way to get fast internet speeds. These features include:
- DOCSIS 3.0: The SB6121 is a DOCSIS 3.0 cable modem, which means that it is capable of achieving speeds of up to 300 Mbps. This is more than enough speed for most people’s needs.
- Built-in Wi-Fi router: The SB6121 has a built-in Wi-Fi router, which makes it easy to set up and get started. The router supports the 802.11ac standard, which provides fast and reliable Wi-Fi speeds.
- Multiple Ethernet ports: The SB6121 has four Ethernet ports, which you can use to connect to your devices. This makes it a good choice for people who have multiple devices that they need to connect to the internet.
- USB port: The SB6121 has a USB port, which you can use to connect a storage device or a printer. This can be useful if you want to share files or print documents from your home network.
Pros and Cons
The Motorola Surfboard SB6121 has a number of pros and cons that you should consider before making a decision about whether or not to purchase it. These pros and cons include:
Pros:
- High-speed performance: The SB6121 is capable of achieving speeds of up to 300 Mbps, which is more than enough speed for most people’s needs.
- Built-in Wi-Fi router: The SB6121 has a built-in Wi-Fi router, which makes it easy to set up and get started.
- Multiple Ethernet ports: The SB6121 has four Ethernet ports, which you can use to connect to your devices.
- USB port: The SB6121 has a USB port, which you can use to connect a storage device or a printer.
Cons:
- Not compatible with all cable providers: The SB6121 is not compatible with all cable providers. Make sure to check with your provider before purchasing the modem.
- Bulky design: The SB6121 is a bit bulky, which may be a problem for some people.
- No voice support: The SB6121 does not support voice services, so you will need to purchase a separate modem if you need this feature.
The Motorola Surfboard SB6121 is a good option for people who want a reliable and affordable way to get fast internet speeds. It is compatible with cable internet plans up to 300 Mbps, and it features a built-in Wi-Fi router. The SB6121 is a good choice for people who have multiple devices that they need to connect to the internet.
Author Profile
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My name is Holly Bell and I have always loved to write.
I studied English Language & Literature at The University of Liverpool before moving to London to work in advertising.
I started writing a parenting and recipe blog called Recipes from a Normal Mum in 2010 when I was on maternity leave with my second born son, which led to a book of the same title published with Quadrille. The blog won a Good House Keeping Award in 2016 for best food blog. I don’t tend to update it much anymore as I’m too busy with other stuff.
Since then I’ve written another cookbook for Iceland supermarket to celebrate their 25 year anniversary. I also worked on a non fiction book without any recipes. It was published in Spring of 2021. I have appeared in various QVC, High Street TV and done shows on BBC Radio.
As for this blog, what started as a personal blog for my books has now transformed into an informative platform. Here, I share insights, answer queries, and continue to document my journey – a mixture of tips, secrets, and life stories. This blog has become a space for connection, learning, and sharing.
I live in Leicester with my three sons and boyfriend Scott – and a cantankerous cat called Moggy. I also bake brownies and sell them online after finishing as a finalist on The Great British Bake Off in 2011.
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