5 Best Comcast Xfinity Cable Modem (2017) |  Reviews

Best Comcast Xfinity Compatible ModemBeing the biggest cable operator in the United States of America, most people prefer Comcast to other companies for internet service provision. Comcast has for a long time boasted about the ultra efficiency and superb quality of its services.

However, the majority of the customers of the Internet service provider are usually dissatisfied with the cable modem that they get as a component of the subscription package. Comcast has realized this and has suggested a list of the best cable modems that their customers can use to substitute with what is found out of the box.

Therefore, it is paramount to know about the best modem for Comcast Xfinity as indicated by the internet service provider.


5 Best xfinity compatible modems Comparison Guide

Adapter's NameDownload Speed channels Ethernet PortsPriceCheck Now!
ARRIS SURFboard SB6141
ARRIS SURFboard SB6141

4.4 Stars (4.4 / 5)
343 Mbps
8 download & 4 upload
4x Ethernet

Linksys cable modem (CM3024)
Linksys cable modem (CM3024)

4.3 Stars (4.3 / 5)
960 Mbps
24 download & 8 upload
1x Ethernet

ARRIS SURFboard SB6121r
ARRIS SURFboard SB6121

4.4 Stars (4.4 / 5)
172 Mbps
4 download & 4 upload
2x Ethernet

Motorola 16x4 Cable Modem
Motorola Cable Modem

4.5 Stars (4.5 / 5)
686 Mbps
16 download & 4 upload
1x Ethernet
NETGEAR CM600 cable Modem
NETGEAR CM600 cable Modem

4.3 Stars (4.3 / 5)
24 download & 8 upload
1x Ethernet


Why you buy Cable Modem for Xfinity and save $150 per year

Although as a new Comcast subscriber you will get a cable modem in the subscription package and of course pay monthly rental fees for it, it is more efficient and economical to buy a new cable modem to substitute the out-of-the-box one.

Comcast has various internet subscriptions which are meant to offer fast internet speeds. However, that doesn’t happen practically and you as a customer can be frustrated by the slow connections. The ISP isn’t to blame for these issues but rather the modem that you are using.

To solve this, you need to buy a new faster cable modem that will be compatible with Comcast. You can always count on the following cable modems that match Comcast Xfinity for superfast internet connections:


5 Best Comcast Xfinity Compatible Modem review

ARRIS SURFboard SB6141 – Affordable Cable modem for comcast

ARRIS SURFboard SB6141 DOCSIS 3.0 Cable ModemBy supporting IPv4 and IPv6, ARRIS SURFboard SB6141 is compatible with most of the largest cable providers in the United States. Depending on the provider of your cable internet service, the cable gives you an opportunity to enjoy excellently fast download Wi-Fi and upload speeds to a maximum of 343 Mbps and 131 Mbps respectively, thanks to its DOCSIS 3.0 and 802.11ac technologies.

The beam forming utilized by this modem allows you to stream your favorite videos and play online games from any area of your home at ultrafast speeds. Use the cable’s pre-set Wi-Fi security to secure your network from malicious intrusion.



Linksys (CM3024) – Best Cable modem for online gaming

Linksys High Speed DOCSIS 3.0 Cable ModemLinksys DOCSIS 3.0 Cable Modem has added more fun to the playing of online games, streaming HD videos and surfing the web, because of its incredibly fast Wi-Fi speeds to a maximum of 300Mbps. You can use the modem on all main providers of cable services due to its wide-range compatibility.

Therefore, with this modem, you will save some bucks that you would have otherwise used on modem monthly rental fees. Replacing your old modem with Linksys DOCSIS 3.0 Cable Modem is a piece of cake since its setup process is incredibly easy. Besides, the modem comes with a comprehensive and easy startup guide.



ARRIS SURFboard SB6121 – Cheap Cable modem for comcast

ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Connect ARRIS SURFboard DOCSIS 3.0 Cable Modem to your computer or router using Gigabit Ethernet port. Then, download what you need on the Internet at unbelievably high speeds of up to 172 Mbps. You will finish uploading a file within a brief time over the modem’s four upload channels at speeds up to 131 Mbps.

The router offers you one of a kind online gaming and video streaming experience. No more dead spots in your network area; you will be able to access fast internet connections everywhere within your network. This modem matches all the main cable service providers such as Comcast among others.



Motorola MB7420 -Elegant and Unique in Looks 

Motorola 16x4 Cable Modem, Model MB7420

Enjoy reliable and fast internet connections with speeds up to 686 Mbps, thanks to Motorola 16×4 Cable Modem, Model MB7420.The modem has an Ethernet port that allows you to connect your TV, wireless modem as well as play station to your cable network. Once you get this modem, you won’t break your back while trying to use it since its set up process is extremely easy and it is well described in a simple quick start guide.

A compact shape is something about this modem that should excite you especially if you have limited space in your house and you fear that a large-sized modem can fall off due to congestion. Besides, this modem has an alluring design that will most probably match your interior décor.


NETGEAR CM600 – high speed cable modem for comcast

 NETGEAR CM600 (24x8) Cable Modem DOCSIS 3.0

With maximum cable internet speeds of 960Mbps, NETGEAR CM600 (24×8) Cable Modem DOCSIS 3.0 ensures that you enjoy quick and high-end streaming of HD videos, lightening-speed downloads, and ultrafast online games. Its set up process includes very easy-to-understand user web interface which helps you have the modem operating within a very short time without having to call the support team for assistance.

The dual-band technology of the modem offers you uninterrupted internet connections throughout your home. The modem’s USB port allows you to connect your printer or storage device to your network. Additionally, you can control the access to your network by setting up a guest network for some of your users.


What to know before buying a modem for comcast

After spotting a cable modem to purchase, you need to confirm if it is going to offer you the value that you are looking for. You should consider the following before you part with your cash:

  • Compatibility with your cable provider: Not all modems work with all cable providers. It can be frustrating to buy one only to find that it isn’t compatible with your ISP. Therefore, it is paramount to check whether the modem appears in the ISP’s list of the compatible modems before you make a purchase. If the provider doesn’t have the list, get relevant information from customer forums or enquire it from the customer care representative.
  • Speed: With fast a fast modem and fast cable Internet plan, you will be able to enjoy fast internet connection speeds. You can know how fast a modem is by confirming whether the modem utilizes DOCSIS 3.0 technology, which helps cable modems offer high internet speeds.
  • Reliability and efficiency: It is vital not to rely only on the modem’s approval by Comcast. Seek to find further information from the relevant customer reviews about the reliability and efficiency of the modem.

Compare ARRIS SURFboard SB6141 DOCSIS 3.0 Cable Modem

Linksys High Speed DOCSIS 3.0 Cable Modem Vs Arris SURFboard SB6121 DOCSIS 3.0 Cable Modem Vs Motorola 16x4 Cable Modem MB7420 DOCSIS 3.0 Vs NETGEAR CM600 24x8 Cable Modem DOCSIS 3.0

NameARRIS SURFboard SB6141 DOCSIS 3.0 Cable Modem Linksys High Speed DOCSIS 3.0 Cable ModemArris SURFboard SB6121 DOCSIS 3.0 Cable ModemMotorola 16x4 Cable Modem MB7420 DOCSIS 3.0NETGEAR CM600 24x8 Cable Modem DOCSIS 3.0
ImageARRIS SURFboard SB6141 DOCSIS 3.0 Cable Modem Linksys High Speed DOCSIS 3.0 Cable Modem, Certified for Comcast/Xfinity, Time Warner, Cox & Charter (CM3024)Arris SURFboard SB6121 DOCSIS 3.0 Cable ModemARRIS SURFboard SB6183 DOCSIS 3.0 Cable ModemNETGEAR CM600 24x8 Cable Modem DOCSIS 3.0
Editor Ratings 4.3 Stars (4.3 / 5) 4.3 Stars (4.3 / 5) 4.0 Stars (4.0 / 5) 4.5 Stars (4.5 / 5) 4.3 Stars (4.3 / 5)










Download Speed343 Mbps960 Mbps172 Mbps686 Mbps960 Mbps
BandsDual BandN/aDual BandFull BandN/a
Ethernet Ports2 – Gigabit Ethernet Ports – 10/100/1000 MbpsN/a1 Ethernet PortN/aGigabit Ethernet port
channels8 downstream and 4 upstream24 download & 8 upload 4 downstream and 4 upstreamN/a24 downstream and 8 upstream
SupportsIPv4 and IPv6 IPv4 and IPv6 IPv4 IPv4 and IPv6 IPv4 and IPv6

Final Verdict

  • You shouldn’t continue paying high monthly modem bills while experiencing annoyingly slow cable internet connections. Get the value of your money and replace your slow modem with a one-time purchase fast modem that will make you forget about all your internet issues. Choose the modem which is efficient and reliable, as well as the one that matches your cable internet plan and cable internet service provider.