NETGEAR CM400 Cable Modem

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85%
88%
Performance
92%
Setup and Installation
85%
Reliability
90%
Compatibility with ISPs
94%
Cost Savings (Rental Fees)
89%
Wired Connection Quality
80%
Build Quality
75%
Customer Support
70%
Wi-Fi Requirement
91%
Ease of Use
92%
Value for Money
78%
Long-term Durability
More

Overview

The NETGEAR CM400 Cable Modem is a reliable solution for those seeking stable internet speeds. This DOCSIS 3.0 modem is designed for compatibility with major ISPs such as Xfinity, Spectrum, and Cox, providing seamless connections for most users. Supporting speeds of up to 340 Mbps, it’s well-suited for browsing, video streaming, and light gaming. However, it does not have built-in Wi-Fi, so a separate router is required. With its easy setup process, the NETGEAR CM400 eliminates the need for renting a modem from your service provider, saving you up to $156 annually.

Features & Benefits

The NETGEAR CM400 stands out with its DOCSIS 3.0 technology, which allows for faster download speeds than older models. Featuring a Gigabit Ethernet port, this modem offers a stable wired connection ideal for high-speed internet activities. One of its most significant advantages is the ability to eliminate modem rental fees, providing long-term savings. Setup is quick and easy, with plug-and-play compatibility across most major cable providers. If you’re tired of paying for equipment rentals, this modem offers a cost-effective alternative.

Best For

The NETGEAR CM400 is perfect for individuals with internet plans up to 100 Mbps who want to avoid the ongoing costs of renting a modem. It suits those who rely on a stable wired connection for activities like gaming, video streaming, or video conferencing. Gamers and heavy internet users will appreciate its reliable speeds for smooth gameplay. Additionally, if you're already using a router and don't need a combined Wi-Fi solution, this modem offers a simple and effective way to upgrade your connection without added complexity.

User Feedback

The NETGEAR CM400 has received generally positive reviews for its consistent performance and easy setup. Users highlight its reliable speed for streaming and gaming. However, some have pointed out that the lack of built-in Wi-Fi means you’ll need a separate router, which may add to the setup cost. On the positive side, many customers have praised its plug-and-play installation and the fact that it’s compatible with a range of major ISPs. A few negative comments mention occasional connectivity issues, but these seem to be the exception rather than the rule.

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Pros

  • Ideal for users with internet speeds up to 100 Mbps, providing reliable and fast wired connections.
  • Helps save up to $156 annually by eliminating the need for modem rental fees from ISPs.
  • Supports DOCSIS 3.0, ensuring better performance and faster speeds than older models.
  • Easy to set up with most major ISPs like Xfinity, Spectrum, and Cox, without needing additional equipment.
  • Compact and lightweight, making it easy to install and move if needed.
  • Great option for gamers and streamers who need a stable wired connection for uninterrupted use.

Cons

  • Lacks built-in Wi-Fi, requiring a separate router for wireless connections.
  • May not provide sufficient speed for high-demand users with internet plans over 100 Mbps.
  • Some users report occasional connectivity issues during peak hours or after extended use.
  • Not a good choice for large households or users requiring a wireless all-in-one solution.
  • Does not offer advanced features or customization options compared to higher-end models.
  • Some buyers might find the setup process challenging if not familiar with modem-router configurations.

Ratings

After analyzing authentic user reviews worldwide, across various languages and platforms, we present the aggregated ratings for the NETGEAR CM400 Cable Modem. Reviews were filtered to exclude spam, bot-generated, or incentivized feedback, ensuring that only genuine user experiences inform these results. Both the strengths and areas of improvement for this device are reflected in the following categories, with a focus on its performance, ease of setup, and compatibility with major ISPs like Xfinity, Spectrum, and Cox.

Performance
88%
Many users are pleased with the speed and reliability of this device. It delivers a stable connection that handles moderate internet usage, such as streaming and online gaming, effectively. The 340 Mbps speed is sufficient for most everyday activities, providing smooth performance across different tasks.
A few users mention that performance may not be ideal for very high-speed plans. Some have experienced slower speeds or occasional connectivity drops with certain ISPs, especially during peak usage times. This could be a concern for those with internet plans exceeding 100 Mbps.
Setup and Installation
92%
The easy setup is a standout feature for many buyers. The device works seamlessly with most cable providers, requiring no extra equipment. Users appreciate the plug-and-play experience, with minimal effort needed to get the modem up and running quickly, even for those with limited technical knowledge.
While setup is generally easy, some users note that a few cable providers may require additional steps or configuration. For those unfamiliar with modem/router setups, even this simple process might cause slight confusion or delay during installation.
Reliability
85%
Users consistently praise the modem's reliability for everyday use, including browsing, streaming, and working from home. It’s especially appreciated for its consistent wired connection, which offers uninterrupted service for most tasks. This makes it a solid choice for those who prioritize stability over advanced features.
However, some users report occasional drops in connection, particularly during high traffic periods or after long periods of use. A few complaints mention that the modem may need a reboot after extended uptime, which can be frustrating for those expecting more consistent performance.
Compatibility with ISPs
90%
One of the most praised aspects is its broad compatibility with major ISPs like Xfinity, Spectrum, and Cox. Users confirm that the modem integrates effortlessly with these providers, ensuring smooth and quick connections without hassle. This makes it a reliable choice for anyone using one of these services.
Despite its wide compatibility, some users report occasional issues with certain ISPs not being fully optimized, which can result in slower connection speeds. Additionally, users with more niche or smaller ISPs may face difficulty getting the modem to work optimally.
Cost Savings (Rental Fees)
94%
The savings from eliminating modem rental fees are a significant draw for many users. With potential savings of up to $156 per year, this modem pays for itself quickly. Buyers appreciate the financial relief, especially for long-term use, as rental fees can add up over time.
While the savings are attractive, some users feel that this benefit is negated by the need to purchase a separate router. For buyers not willing to invest in both, this could be seen as an extra cost that diminishes the overall value proposition.
Wired Connection Quality
89%
The wired connection quality of this device is consistently rated highly, with users noting the stability and reliability it provides. Gamers and streamers especially appreciate the low latency and fast speeds during online activities. It's ideal for households where wired connections are a priority over Wi-Fi.
However, some users mention that the modem does not offer wireless support, requiring an additional router for full functionality. This might be inconvenient for those seeking a complete all-in-one device that handles both wired and wireless connections.
Build Quality
80%
20%
The build quality is generally solid, with a sturdy, well-designed housing that feels durable. Most users appreciate the compact size and lightweight design, making it easy to place anywhere in the home. Its minimalistic appearance also blends well with other home tech setups.
However, some users have expressed concerns about the longevity of the modem, particularly in terms of its susceptibility to overheating after extended use. While the device performs well initially, some fear it may wear out more quickly than expected.
Customer Support
75%
25%
A few users have shared positive experiences with NETGEAR’s customer support, particularly when troubleshooting connection issues or setting up the device. The support team is generally responsive and helpful, offering guidance through phone and online chat options.
On the other hand, some buyers report difficulties getting timely support. Delays in response times and unhelpful guidance were common complaints. This has led to frustration for users who needed quick solutions, especially in cases of technical difficulties with setup or connectivity.
Wi-Fi Requirement
70%
30%
For those who already have a separate Wi-Fi router, the lack of built-in Wi-Fi isn't a significant issue. In fact, it can be an advantage for users who prefer to manage their network setup and control Wi-Fi features independently.
However, many users find the absence of Wi-Fi a major inconvenience. Without integrated wireless functionality, they have to purchase an additional router, which increases the overall cost and complexity of their setup.
Ease of Use
91%
The simplicity of this modem makes it highly accessible to both tech-savvy and novice users. The plug-and-play setup process ensures that most people can get it running quickly without requiring specialized knowledge. The straightforward design adds to the ease of use.
A small number of users note that the lack of a detailed user manual or instructional guide can make initial setup a bit confusing, especially for those who are new to modems or technology in general. However, this is a minor inconvenience for most.
Value for Money
92%
This modem offers great value for money, particularly for users looking to cut down on rental fees. The combination of solid performance, ease of setup, and cost savings makes it an attractive option for many, offering long-term financial benefits. Its affordability, combined with good performance, ensures a great return on investment.
Some users feel that the device's lack of integrated Wi-Fi reduces its overall value, especially for those who need a wireless solution as well. Additionally, a few feel that the price could be slightly lower, given the absence of certain advanced features like Wi-Fi capabilities.
Long-term Durability
78%
22%
The modem holds up well in the short-term, delivering steady speeds and performance for everyday use. Users appreciate the overall design and sturdy build, with no major issues during initial use.
However, concerns about long-term durability persist for some buyers. A few report signs of wear and performance degradation after several months of continuous use. This could be a concern for those planning to use the modem for several years without upgrading.

Suitable for:

The NETGEAR CM400 Cable Modem is a great choice for users looking to reduce internet costs without sacrificing performance. It’s particularly well-suited for people with internet plans up to 100 Mbps, such as small households, students, or those with basic streaming and browsing needs. Gamers and streamers who prefer a stable wired connection will also appreciate its reliable performance, especially for activities that require low latency. Additionally, those who want to avoid monthly rental fees from ISPs will find this modem to be a solid long-term investment, potentially saving up to $156 per year. With its plug-and-play setup, it is an excellent option for anyone who prefers a straightforward, hassle-free installation process with major providers like Xfinity, Spectrum, and Cox.

Not suitable for:

This modem may not be the best fit for users with high-speed internet plans exceeding 100 Mbps, as its performance could underdeliver for more demanding tasks or advanced applications. It's also not ideal for anyone needing Wi-Fi capabilities, as it lacks built-in wireless functionality, requiring a separate router. This makes it less suitable for large households or those who want an all-in-one solution. Additionally, while it’s compatible with several major ISPs, some users have reported occasional issues with connectivity, especially during peak usage hours. People seeking advanced features, like additional security options or a higher degree of customization, might find this device lacking in those areas.

Specifications

  • Modem Type: DOCSIS 3.0 cable modem, offering improved download speeds over earlier standards.
  • Maximum Speed: Supports download speeds up to 340 Mbps, ideal for internet plans up to 100 Mbps.
  • ISP Compatibility: Compatible with major ISPs including Xfinity, Spectrum, and Cox for easy setup.
  • Ethernet Port: Includes one Gigabit Ethernet port for stable and high-speed wired connections.
  • Wi-Fi Support: Does not have built-in Wi-Fi, requiring a separate router for wireless internet access.
  • Channel Bonding: Supports 8x4 channel bonding for optimized data transfer and internet stability.
  • Modem Rental Savings: Helps save up to $156 per year by eliminating the need for ISP modem rentals.
  • Setup Process: Designed for easy plug-and-play setup with most cable providers, requiring no additional equipment.
  • Weight: Weighs 1.08 lbs, making it lightweight and easy to install in any setup.
  • Max Internet Plan: Best suited for internet plans up to 100 Mbps for reliable performance.
  • Router Requirement: Requires an external router for Wi-Fi functionality, as this modem does not include wireless capabilities.
  • Dimensions: Compact size designed for easy placement in home or office setups.
  • Warranty: Includes a standard limited warranty to cover any manufacturing defects.
  • Certifications: Certified for use with major ISPs, ensuring full compatibility with approved network services.
  • Power Supply: Operates using a standard power adapter included in the package.
  • Environmentally Friendly: Manufactured with energy-efficient components to minimize power consumption.

FAQ

The NETGEAR CM400 supports download speeds of up to 340 Mbps, making it suitable for fast internet plans, especially for users with speeds up to 100 Mbps.

No, this modem does not include built-in Wi-Fi. You'll need a separate router for wireless connectivity.

Yes, this cable modem is compatible with major ISPs like Xfinity, Spectrum, and Cox, making it a great choice for users with those providers.

The setup is straightforward and plug-and-play with most cable providers. Just connect the modem to your cable line and the Ethernet port to your router or computer, and you should be good to go.

Yes, since the NETGEAR CM400 doesn't have built-in Wi-Fi, you'll need to connect it to a separate router if you want wireless internet access.

The NETGEAR CM400 is ideal for plans up to 100 Mbps. For speeds higher than this, you might want to consider a modem that supports DOCSIS 3.1 for better performance.

By using the NETGEAR CM400 instead of renting a modem from your ISP, you can save up to $156 per year, depending on your provider’s rental fees.

Yes, the stable wired connection provided by this device makes it an excellent option for gamers and streamers who need uninterrupted performance.

While the NETGEAR CM400 works well for most plans up to 100 Mbps, it’s not the best choice for users with higher-speed plans, as it may not fully support very high-speed connections.

Generally, this device requires minimal maintenance. However, it’s a good idea to check for firmware updates occasionally, especially if you experience connectivity issues or changes in ISP requirements.