The Motorola MB7621 easily kept five devices running four simultaneous bandwidth-intensive applications in our tests.

The majority of the modems we tested were nearly identical, but the Motorola MB7621 stood out. Its excellent performance, sleek yet functional design, labeled ports, sophisticated user interface, power button, clear instructions, and bundled accessories make it a very simple and effective gadget to operate.

The Motorola MB7621 has 24 downstream channels that can easily handle HD streaming, and eight upstream channels that can handle gaming and cloud computing. The MB7621 has a maximum speed of 1000 Mbps, although it's designed for internet subscriptions with a maximum speed of 650 Mbps.

We put the Motorola MB7621 through its paces on Xfinity's 400 Mbps bundle, and it performed admirably. It also includes a power button, which is absent from several of the modems we tested, as well as a coaxial connection wrench, Ethernet cable, and a hook-and-loop cord strap.

Aside from its solid specs and ease of use, the MB7621 is a decent purchase because it can save you money over nine months compared to renting a modem from your ISP, and it comes with a two-year warranty against manufacturer fault. It also incorporates lightning and power surge protection, as well as a well-ventilated shell that keeps it cool.

Specifications

• Downstream channels: 24
• Upstream channels: 8
• Theoretical top speed: 1,000 Mbps

Buy it here: https://www.amazon.com/-/es/Motorola-Aprobado-Comcast-Spectrum-Descargas/dp/B077BL65HS/ref=sr_1_1?

Reasons to buy

• Power button
• Useful accessories
• 2-Year Warranty

Reasons to avoid

• Larger than other units
• Utilitarian appearance

With 24 downstream and eight upstream channels, the Netgear CM600 is a high-performance cable modem. This modem is also extremely ISP compatible, making it excellent if you plan to switch providers in the future.

With five devices connected at once to the 400 Mbps Xfinity connection, performance speeds were remarkable, and data transmission was handled flawlessly. An Ethernet port, reset button, coaxial connection, power input, and on/off button are located on the back of the device. That power button is a major benefit because most problems can be solved by simply turning the power off and on again.

The Netgear user interface is straightforward to use and strikes a good balance between basic and advanced capabilities.

This modem is a good deal cheaper than renting one. The CM600 is priced at around $90-$100. Xfinity charges $11 per month or $132 per year to rent their xFi Gateway, so buying the CM600 saves you over $30 over the course of its one-year guarantee, and it may live longer.

If you want to save a few dollars on a device that isn't quite as fast but is still a strong and highly compatible option, the Netgear CM500 is a wonderful alternative.

Specifications

• Downstream channels: 24
• Upstream channels: 8
• Theoretical top speed: 960 Mbps

Buy it here: https://www.amazon.com/-/es/NETGEAR-Cable-m%C3%B3dem-CM600-proveedores/dp/B01621M1S4/ref=sr_1_1?

Reasons to buy

• Compatible with most ISPs
• High-speed performance
• Slim profile

Reasons to avoid

• Tall footprint
• One-year warranty

Unlike most cable modems, the Arris Surfboard 6183 is available in two colors, allowing you to pick the one that best suits your taste. In either case, you can count on a reliable performance and a long-lasting build, which is guaranteed by a two-year warranty.

With 16 downstream and four upstream channels, this modem is more than capable of keeping your busy network connected to the internet. In our hands-on tests, it performed as predicted.

The color-coded status LEDs on the Arris Surfboard 6183 are a feature we found extremely useful. Instead of merely showing that it's connected, its uplink and downlink icons glow different colors depending on the connection quality. On the forward-facing status screen of every other modem we examined, there was a LAN indicator. On the SB6183, the LAN indicator has been replaced by an Ethernet port status light, which is more easily accessible for diagnostics.

Specifications

• Downstream channels: 16
• Upstream channels: 4
• Theoretical top speed: 686Mbps

Buy it here: https://www.amazon.com/-/es/ARRIS%C2%AE-Surfboard%C2%AE-SB6183-blanco-renovado/dp/B09QHBXHDV/ref=sr_1_5?

Reasons to buy

• Super reliable
• Two-year warranty
• Color-coded indicator LEDs

Reasons to avoid

• No LAN status icon
• Awkward coaxial placement

In terms of networking gear, the Asus CM-16 is a nice-looking device. Its tiny design and gently patterned side panels make it elegant enough to blend in with your decor while remaining unobtrusive.

It's a DOCSIS 3.0 cable modem with 16 upstream and four downstream channels, with download rates of up to 686 Mbps and upstream speeds of up to 131 Mbps. It handled numerous simultaneous connections on our testing facility's 400 Mbps internet service with ease in our tests.

The outdated online user interface was the only flaw in the Asus CM-16's review. Though it functions, it appears to have been designed decades ago and isn't as user-friendly as other interfaces we've seen. Despite this, the ASUS CM-16 is a solid modem that will save you money over renting from your ISP.

Specifications

• Downstream channels: 16
• Upstream channels: 4
• Theoretical top speed: 686 Mbps

Buy it here: https://www.amazon.com/dp/B01M6WJWQY?

Reasons to buy

• Compact
• Decent speeds
• Good value

Reasons to avoid

• Outdated user interface
• 16 x 4 rather than 24 x 8 channels

The TP-Link TC-7620 has 16 by four channels instead of the 24 by four alternatives at the top of this list, but it's still a speedy router. This achieved an outstanding 400 Mbps line in our tests, even with 4K video streaming, multiple consoles gaming, and a laptop connected at the same time. Theoretical peak speeds of 680 Mbps have been reported.

But it's the versatility to work with a variety of providers that makes this cable modem so appealing. This is a very compatible cable modem that works with Comcast, Spectrum, and Cox, among others.

While this model lacks a power button, it is nonetheless simple to operate and set up thanks to a good web interface. The TP-Link TC-7620, like the other models on this list, will save you money if you buy it instead of renting it, with the savings occurring within the first year.

Specifications

• Downstream channels: 16
• Upstream channels: 4
• Theoretical top speed: 680

Buy it here: https://www.tp-link.com/us/home-networking/cable-modem-router/tc-762

Reasons to buy

• Wide compatibility
• Compact form
• High-speeds

Reasons to avoid

• 16 x 4 rather than 24 x 8 channels

With 24 downstream channels and 8 upstreams, the Linksys CM3024 is another high-speed alternative. That implies it could theoretically reach 960 Mbps, which is the true speed of most Gigabit cable connections.

Even when streaming and downloading huge files at the same time, speed on a 400 Mbps Xfinity line was outstanding, with no difficulties at all. This is an excellent choice for anyone with a connection speed of 300 Mbps or above.

This is, however, a more expensive alternative than many others. The build quality is decent, with some inconspicuous aesthetics and clearly labeled LEDs, all of which contribute to the price being justified. However, as far as we could tell throughout our testing, there is no user interface. This is either a bad thing because it doesn't exist, or a bad thing since it's nearly impossible to find if it does. That said, it was simple enough to set up provided you don't want a user interface.

Specifications

• Downstream channels: 24
• Upstream channels: 8
• Theoretical top speed: 960

Buy it here: https://www.amazon.com/Linksys-CM3024-Certified-Comcast-Functionality/dp/B01DACQM9M

Reasons to buy

• Labelled LED lighting
• Up to 960 Mbps
• 24 x 8 channels

Reasons to avoid

• Lack of UI
• Price