Networking Reviews Review

Best Cable Modems for Comcast Xfinity – Buyer’s Guide

Cable internet service is still the best when it comes to the home internet. But many people still pay their cable companies monthly fees to use their modem. Did you know you could escape these costs by investing in your cable modem? Most companies charge around $10 a month. When you first look at it, it seems small, but in the long run, this fee can be more than what you initially pay for your modem. That’s why it’s always wise to buy your own modem and this article is all about Best Cable Modems for Comcast. Even better, when it becomes obsolete, you can trade it for another one.

When it comes to Comcast, their modems are not outright on the market. You must have a Comcast account if you wish to find the best hardware that’s compatible with your setup. The thing is, modems have almost the same configuration and are not deemed to be outdated in the near future.

Here, we help you identify the best cable modems to go with your Comcast home internet setup. The truth is that you’ll save hundreds of dollars out of rental fees. So buckle up as we give you a detailed review of the best models.

But first;

What are the Features to Expect in an excellent Cable Modem for Comcast?


Most cable modems claim to be sync with your home internet setup. But are they approved? You could get a favorite modem among many users but once you install it on your system it doesn’t work. That type of modem is useless to you even with the best features. It’s always wise to confirm with your ISP provider if the particular model you are looking to purchase is compatible.

Fortunately, out list of Best Cable Modems for Comcast will save your time, they are all compatible.

Internet Speeds

Can your internet service get proper support from the cable modem? Your modem should be able to run with everything your internet service provides. This is mainly because of the data channels it has. When your ISP and the modem are in sync, then you can be sure of fast speeds.


When you look to skip monthly charges on rental modems, it’s only right that you look for a cable modem that offsets those costs. It should pay for itself within the first year of use so you can feel the relief you really need. You should also expect to save a couple hundred dollars after using your cable modem in the second year after you purchase it.

Simple Design

Every cable modem should be easy to understand when it comes to the settings. It makes it easy for you to know when you are having problems with the connectivity. The different indicator lights on the modem should be easy to read and comprehend over the time you’ll be using the modem.

Best Cable Modems for Comcast

 Product NameNum of ChannelsMax speed 
#1ARRIS SURBboard SB6141 (best price)8x4343Mbps/131Mbps Buy now
#2ARRIS SURBboard AC1900 (best combo)16x4686Mbps/131Mbps Buy now
#3Motorola MB742016x4686Mbps/131Mbps Buy now
#4LINKSYS CM302424x8960Mbps/240Mbps Buy now
#5Netgear CM60016x4686Mbps/131Mbps Buy now

#1. ARRIS SURFboard DOCSIS 3.0 SB6141 Cable Modem

The ARRIS Surfboard SB6141 is perhaps the most popular cable modem approved for Comcast. It is not only affordable, but the device is built to last. Thousands of users have had the chance to use this modem, and the experience is over the top. You’ll have a chance to install it fast and easy since it only requires a quick plug in and the whole setup is complete.

This modem favors high-speed internet as it is furnished with 343Mbps download speeds. You no longer have to wait hours to watch your favorite movies online as it supports live streaming of high definition videos, downloading of large files and even online gaming. For those that have their family devices using the same wireless network, it’s pleasing that you skip delays thanks to the eight downloading channels. Not forgetting, it comes with four uploading channels so everyone can have their share of social media fun.

The DOCSIS 3.0 version eliminates any instances of buffering and lags. You’ll have a smooth time, replete with fast speeds so that you can complete big business tasks from the comfort of your home. With an internal filter, the modem can minimize interference to enhance its performance.  It’s quite a catch since you don’t have to use it with Xfinity only. It can support a whole lot of other internet services, so you’ll be open to whichever provider you like.

When it comes to future upgrades, you are safe with the SB6141 ARRUS modem. It supports modern internet standards, which is the iPv6. This means you are good for decades before it will ever become obsolete. This modem also comes in a compact design such that it sits unobtrusively where you set it. Not to mention, the installation process is a breeze where you only link a few cables to the router, and you are good to enjoy fast internet speeds.

  • Compatible with Xfinity and a line of other internet providers
  • Much cheaper than leasing a cable modem
  • Easy to install and troubleshoot
  • Provides blazing internet speeds
  • Supports multiple functions simultaneously
  • It is not 100% compatible with all cable providers
  • Cable Modem Only


#2. ARRIS SURFboard DOCSIS 3.0 AC1900 Cable Modem Router (Best cable modem combo)

ARRIS SURFboard DOCSIS AC1900 Cable Modem Router

Life gets much easier when you have the ARRIS SURFboard AC1900 for your Comcast Xfinity. The essence of this modem is to provide you with a solution to monthly lease charges. If you don’t want to have a series of devices sitting on your home desk, just get this sleek modem and enjoy home internet just like everyone else.

First, it is a two-in-one package which gives you a Wi-Fi access point with the AC1900 router and the modem which facilitates the high performance. Being the best of the cable modems in the ARRUS lineup, you can expect download speeds of up to 686Mbps and Wi-Fi bandwidth at 1900Mbps. What could you ask for when you say goodbye to buffering and unwarranted delays.

Plus the DOCSIS 3.0 version tends to be 16x faster than the 2.0 version. This way, you’ll not be contending with reliability issues anywhere near the future.

The download channels will get you even more excited. 32 channels are what you get which allows every member of your family to watch music videos, while others download games, apps, do some online shopping, or even watch the live sports. When it comes to uploading, you’ll get eight channels which is more than you could ever ask for. Plus it comes with four gigabit Ethernet ports which improve the performance of the modem extensively.

The future is also secure with this modem. iPv6 and iPv4 are standard networks for it; hence it will work well into the future. What’s more the router with this modem benefits from beamforming technology? This is whereby your router finds the Wi-Fi connection with your devices, and it focuses the signal to that location. It provides for the signal to access your laptop or smartphone through walls and obstacles.

  • High speeds eliminate lags and buffering
  • Achieves maximum coverage using beamforming tech
  • Enjoys 1.4Gbps download speeds and 1750Mbps Wi-Fi speeds
  • Supports modern internet standards iPv6 and iPv4
  • Two-in-one DOCSIS 3.0 Cable Modem + AC1900 WiFi Router
  • Some users sight reliability hurdles when it troubleshoots some problems
  • Not compatible with: Verizon, AT&T, or CenturyLink


#3. Motorola 16×4 Model MB7420 Cable Modem

Motorola MB7420 Cable Modem

The struggles that come with working with low speeds are a thing of the past with the Motorola 16×4 model. This is especially true if you use Comcast Xfinity as your primary home internet service. The Motorola modem comes fully equipped with functions which make every download worth your penny since you get just what you pay for.

With network speeds of up to 686Mpbs, you are set to having a smooth time. It helps you enjoy the perks of modernity since you don’t need to wait for a page to load or for the next scene in your favorite series. You’ll be at the moment as every second counts. Uploads are not left out since it allows up to 131Mpbs speeds. If you love sharing your everyday expeditions, this is the modem you want to grace your router.

For those that can’t keep out the urge to have many gadgets from tablets, laptops, desk computers and the like, you are in for a treat. This modem supports sixteen channels. Having been certified for Comcast and other Cable services, you can be sure that you are investing in a reliable product. Not to mention, this modem is reliable even through the stormy days. It can withstand extreme power fluctuations, surges, and lightning.

With four gigabit Ethernet ports, you’ll be able to physically connect your HDTV, computer, gaming kit, or your router directly. This way, your device will not be competing for internet signals. Instead, it experiences a smooth connection which lets you complete projects in time. Seeing that it has an inbuilt router, you’ll not necessarily have to invest in extra equipment to boost your internet needs. To say the least, the Motorola model is a device to consider seriously.

  • Certified for Comcast Xfinity plus other major cable providers
  • Well-written start up guide eases the installation process
  • Four gigabit Ethernet ports
  • Sixteen cable data channels and four upload channels
  • Small and compact to sit in a clean fashion next to a router
  • Some users prefer their cable modem in a bright color
  • Cable Modem Only


#4. Linksys DOCSIS 3.0 High-Speed 24×8 CM3024 Cable Modem

Linksys DOCSIS High Speed CM3024 Cable Modem

Did you know that maximizing on Wi-fi speeds needs an upgrade on your modem? Well, with the Linksys, you get much more. This particular cable modem is not only stable, but it is also compatible with a line of the main ISP services. If you are not up to the hassle of renting a modem, then this is your best option to get you a stress-free home internet service. The Wi-Fi speeds are incredible at 300Mbps.

It gets you enjoying fast web surfing, downloads, live streaming, and many other internet services. You can download large amounts of data since it supports 960Mbps. Your friends and family will be able to connect to the sites they love all owing to this modem. Plus you don’t have to wait all day to upload photos and videos. With 240Mbps speeds, it’s much better than you can get on regular modems.

With the help of Intel Puma 6 Chipset, the modem can perform with excellence when either up streaming or down streaming. It is free from interferences from other surrounding signals since it connects seamlessly to your current Comcast cable connection. Better still, it can handle the highest bandwidth transfer rates to enable a smooth run with your current cable lines.

Being a tech nerd is out of the picture with the Linksys modem. It has a simple plug in setup. You’ll not have to spend time trying to figure out the configuration since it is just an external hardware device. It configures itself the moment you connect it to your router. You are not only free of monthly charges, but it exempts you from spending time with technicians who charge for their services.

  • Works perfectly with Comcast Xfinity
  • Operates seamlessly from out of the box without extra connectivity issues
  • Provides high download and upload speeds
  • It has many cable channels to support many devices
  • Supports 300Mbps Wi-Fi speeds with a router
  • It does not have ports to connect with phones
  • Cable Modem Only


#5. NETGEAR Cable Modem CM600

NetGear CM600

For some cable modems, capturing the full band is quite a challenge. It leads you to experience slow internet speeds when you could enjoy much more. With the Netgear CM600, it gets to connect seamlessly with your current ISP service such that it supports the speeds and even upgrades the performance of your internet. With 400Mbps speeds, you can connect just about anywhere around your house.

This modem also favors up to 400Mbps upload speeds for those who like spending time up streaming videos to their social sites. With sixteen cable channels, you can perform most of the activities you love on the internet without hassle. You can enjoy fast video streaming and gaming from the comfort of your home. Even those projects you need to finish will be less of a hassle when you start using this modem.

This model is furnished with a gigabit Ethernet port where you can connect your Macintosh or Windows computer, routers and Ethernet-enabled devices. Since it comes with a full-band capture tuner, it allows for speedy connection with ISP services. Not forgetting that since its DOCSIS is a 3.0 version, the model experiences up to sixteen times more speed.

The future is guaranteed with the iPv4 and iPv6 internet standards already configured for the modem. You’ll love the simple installation process. It uses a plug in setup and direct compatibility with Comcast Xfinity and major ISP services like Time Warner. All in all, this is an all-around cable modem which delivers on the functions it promises.

  • Supports latest versions of internet standards and future possibilities of upgrades
  • It has many download and upload channels
  • Supports 400Mbps speeds
  • It eliminates charges on renting a cable provider modem
  • It has a gigabit Ethernet port


Wrapping Up

 Product NameNum of ChannelsMax speed 
#1ARRIS SURBboard SB6141 (best price)8x4343Mbps/131Mbps Buy now
#2ARRIS SURBboard AC1900 (best combo)16x4686Mbps/131Mbps Buy now
#3Motorola MB742016x4686Mbps/131Mbps Buy now
#4LINKSYS CM302424x8960Mbps/240Mbps Buy now
#5Netgear CM60016x4686Mbps/131Mbps Buy now

Not every cable modem out there is ideal for your Comcast setup. With the models in the list of Best Cable Modems for Comcast above, you can be 100% sure of the compatibility. These devices come approved for their reliability, fast internet speeds, and ability to connect to multiple devices. When you choose these cable modems, you choose freedom from monthly charges as you step into the world where you can enjoy home internet with no strings attached. 

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