May 26, 2024

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Cream of Techno

Best Cable Modems (for Comcast Xfinity): The Top 5

5 min read
Best Cable Modems (for Comcast Xfinity): The Top 5

This post includes the five best Cable modems for Comcast’s Xfinity Internet service that you can confidently buy today.

I picked these modems after ongoing long-term experiences via my personal use and those of friends, family members, or business partners. All are excellent in their own right and are still working today.

Pick one for your Cable connection and a router or mesh system in one of the best lists in the box below, and you’re game. I can almost promise that.

Broadband Internet and Wi-Fi: Netgear CM600 Cable Modem
Best Cable Modems: Here’s a typical broadband setup with a Cable modem

Top five best cable modems for Xfinity: The list

I list these modems in the speed-grade order, starting with the slowest. Each will work well for the designated plans‘ speed.

It’s worth noting that Comcast Xfinity tends to provision cable connection’s download speed some 20% higher than the plan. As a result, it’s best to get a modem that can handle more than your plan. And that’s also my idea behind building this list.

For more on each modem, check out the in-depth review.

1. Netgear CM600: An valuable modem for Xfinit’s Fast (400Mbps and lower)

Netgear CM600 Lights
Best Cable Modems: The Netgear CM600 in action

The CM600 has been around for a long time and is the only DOCSIS 3.0 cable modem on this list. It’s affordable and never failed me during a 5-year-and counting of service.

Technically, it can handle up to 960Mbps of download speed, but it’s best to use it with any plan that delivers 600Mbps or slower.

Pros

Fast and reliable performance for sub-Gigabit broadband

Supported by multiple cable providers

Affordable and relatively compact

Clear status lights, useful web interface

Cons

No Gig+ or Multi-Gig support


2. Netgear CM1000: An excellent Cable modem for Xfinity’s Superfast (800Mbps and slower)

The Netgear CM1000 DOCSIS 3.1. is one of the best Cable Modems
Best Cable Modems: The Netgear CM1000

The Netgear CM1000 is a DOCSIS 3.1 and can handle faster-than-Gigabit cable connection. However, it has a Gigabit port which is the bottleneck.

Technically, you can use it for a Gigabit cable plan. However, because a Gigabit port has overhead, the modem can only sustain at a slower-than-Gigabit speed, though only by a small margin.

We’ve used this modem for over two years with no issues.

Pros

Fast and reliable performance, with up to 1Gbps of broadband speed

Supported by multiple cable providers

Relatively compact with clear status light

Cons

Single LAN port, no WAN Link Aggregation


3. Motorola MB8600: Another excellent option for Xfinity’s Superfast with an option for 2Gbps link aggregation

Broadband Internet Troubleshooting: The MB8600 Cable Modem 9Motorola MB8600 Cable Modem
Best Cable Modems: The Motorola MB8600 Cable Modem in action. You must remove the yellow strip to use its other LAN ports (for Link Aggregation.)

The Motorola MB8600 is an interesting cable modem.

On the one hand, it’s an excellent option for a sub-Gigabit plan, like the Netgear CM1000 above; on the other, it has additional LAN ports that can be combined into a 2Gbps Link Aggregation WAN connection for a supported ISP.

We’ve used this one — in the former role — for almost two years with no issues at all.

Pros

Fast and reliable performance

Supported by multiple cable provider s

Optional WAN Link Aggregation and multi-Static-IP support

Cons

No Multi-Gig network port

4. ARRIS SURFboard S33: The compact option for Xfinity’s Gigabit Extra (1200Mbps) and faster

ARRIS SURFboard S33 Modem Status LightARRIS Surfboard S33 In Hand
The ARRIS SURFboard S33 is a compact Cable modem with a single color-changing status light.

Supporting DOCSIS 3.1 and having a 2.5Gbps LAN port, the ARRIS SURFboard S33 is an excellent Cable modem for those with a super-fast Internet plan.

I’ve used it for over a year — since my review — with no issues.

Pros

Fast and reliable performance, up to 2.5Gbps of broadband speed

Compact and nice-looking design

Can handle two status IP addresses

Cons

Cryptic, impractical single-status light

5. Netgear CM2000 Nighthawk: The full-size option for Xfinity’s Gigabit Extra (1200Mbps) and faster

Netgear CM2000 Nighthawk Multi Gig Cable Modem LightsFiber optic Ont vs Cable Modem
Best Cable modems: Here’s my Netgear CM2000 Nighthawk Cable modem working by itself vs when it’s part of a Dual-WAN setup.

Similar to the ARRIS SURFboard S33, the Netgear CM2000 can deliver up to 2.5Gbps of download speed, making it an excellent Cable modem for Xnitity’s fastest plan, the Gigabit Extra, which, in my experience, can deliver 1.5Gbps of download speed.

I’ve used it for almost two years as my personal modem. Initially, it was the only Internet source for my home. Since March this year, when I upgraded to a 10Gbps Fiber-optic plan, I’ve kept it as a secondary connection in a Dual-WAN setup.

It’s been an excellent modem with no issues at all.

Pros

Fast and reliable performance, up to 2.5Gbps of broadband speed

Supported by multiple cable providers

Relatively compact with clear status light

Comprehensive web interface

Cons

Single LAN port, no WAN Link Aggregation

The final thoughts

When using Cable Internet, I recommend getting a retail modem and a separate router or mesh system.

I detailed all the reasons in this post on how to activate a new cable modem. But among other things, you’ll get faster connection speed, avoid the monthly hardware rental fees, enjoy better privacy, and have much better flexibility in picking which equipment to use in case you want to change or upgrade.

After that, it never hurts to get the fastest Cable modem available — so it’s always safe to pick the Netgear CM2000 or ARRIS SURFboard S33 above.

However, unless you intend to upgrade your broadband speed later, getting a modem faster than your Internet plan is always a waste of investment.

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