NETGEAR CM1000 Cable Modem Review

Looking for a modem that keeps up with the high-speed demands of modern internet plans? Our Netgear CM1000 Review reveals it as a standout choice, offering gigabit speeds and compatibility with big-name ISPs. However, it lacks WiFi, has a single Ethernet port, and might pinch your pocket initially.

Curious if it’s the right fit for you? Stay tuned as we dive into its pros and cons, features, real-world performance, and how it stacks up against competitors, ensuring you make an informed decision.

Quick Verdict ⭐⭐⭐⭐☆ (4.4 out of 5)

The Netgear CM1000 is a reliable DOCSIS 3.1 modem that delivers solid gigabit speeds up to 1Gbps. It’s a future-proof option for faster internet tiers, with wide compatibility across Xfinity, Spectrum, Cox, and other major cable ISPs.

While max speeds are capped at around 940Mbps due to the single Gigabit Ethernet port, the CM1000 offers great value for money. It’s an affordable way to unleash faster speeds compared to rented modems, with an easy setup process and compact, cool-running design.

The 1-year warranty is relatively short but can be extended affordably. For stable, high-performance gigabit internet without buffering or lag, the CM1000 gets the job done for most households right now. Faster multi-gig alternatives exist, but 1Gbps remains the current sweet spot until 2.5Gbps and 5Gbps cable internet plans become more widespread.

Netgear CM1000 Review – Pros and Cons

What We Liked

  • DOCSIS 3.1 Technology: Offers top-notch speed and efficiency, making it future-proof.
  • Compatibility: Works with major cable providers like Xfinity, Spectrum, and Cox.
  • Gigabit Ethernet Port: Ensures a fast and reliable connection to your router or computer.
  • Saves Money: Eliminates rental fees from cable providers, saving up to $168/year.
  • Easy Setup: Simple installation process that doesn’t require professional help.

What Can be Improved

  • No Built-in WiFi: Requires a separate router for wireless connectivity.
  • Price: Higher upfront cost compared to some DOCSIS 3.0 models.
  • Limited to One Ethernet Port: May not suit users with multiple direct-wired devices.

See also: Netgear CM1000 vs. Arris SB8200: Comprehensive Product Comparison Review

Overview and Main Features

The Netgear CM1000 is a DOCSIS 3.1 cable modem, meaning it supports the newest DOCSIS standard for broadband internet provided over cable TV infrastructure. DOCSIS 3.1 modems like the CM1000 allow for gigabit download speeds and beyond, enabling you to take full advantage of the fastest cable internet plans available from providers like Xfinity, Spectrum, and Cox.

Some of the main features and benefits of the Netgear CM1000 cable modem include:

  • Gigabit download speeds – With support for DOCSIS 3.1, the CM1000 provides max download speeds up to 1Gbps. This makes it a good future-proof option as providers expand gigabit-tier plans.
  • Broad ISP compatibility – The modem works with almost all major cable internet providers, including certified support for fast speeds on Xfinity, Spectrum, and Cox.
  • Single gigabit Ethernet port – A Gigabit Ethernet LAN port allows for wired connection speeds up to 1Gbps when connecting to a computer, router, or other networked device.
  • No built-in router – As a standalone modem, the CM1000 gives you flexibility to use your own WiFi router instead of paying monthly rental fees.
  • Compact, low-profile design – Measuring 8.8 x 3.5 x 5.9 inches, the modem has a space-saving upright tower form factor. Status lights on the front aren’t overly bright.

The CM1000 hits a nice sweet spot between the more budget-friendly CM600 modem and higher-performing multi-gigabit models. While the modem itself maxes out at around 1Gbps, the move to DOCSIS 3.1 future-proofs your internet setup for the 5-10 years as infrastructure and speed tiers inevitably improve over time.

And by owning your own modem outright instead of paying rental fees to internet providers, the CM1000 pays for itself in no time – saving up to $168 per year, depending on your provider.

Real-World Performance and Reliability

In practice, the Netgear CM1000 delivers outstanding real-world gigabit speeds when paired with a compatible cable internet plan.

  • Provides fast, steady connections consistently at or above advertised speeds.
  • Handled sustained transfer rates of 800-900Mbps with no buffering or lag issues.
  • Works flawlessly across a range of speed tiers from 100Mbps up to full gigabit plans.
  • Extremely reliable day-to-day performance once installed, with no random disconnects or need to reboot.
  • Easy, hassle-free setup process in under 5 minutes for self-installation.

The CM1000 uses Broadcom BCM3390 chipset known for best-in-class throughput, low latency, and minimal processing overhead or ‘taxing’ on your internet speeds. In back-to-back testing against a rented Xfinity gateway, speeds when connecting devices via Ethernet measured slightly faster on average when using the Netgear modem.

That said, the benefits are less noticeable for basic web browsing and streaming. But you’ll appreciate the extra overhead for large downloads and transfers, especially as 100GB+ game downloads become more commonplace. Online gamers will also benefit from lower ping times thanks to efficient hardware processing.

Unboxing – What’s Inside?

Upon unboxing the NETGEAR CM1000, you’ll find:

  • The CM1000 Modem: Encased in a sleek, black, and tower-like design that is both space-efficient and aesthetically pleasing.
  • Power Adapter: To power up the device.
  • Ethernet Cable: For connecting the modem to your computer or router.
  • Quick Start Guide: Provides straightforward instructions for a hassle-free setup.


  • Dimensions: 5.9″L x 5.4″W x 8.8″H, making it a compact device that can fit in tight spaces.
  • DOCSIS 3.1 Support: Ensures compatibility with future internet speed upgrades from your ISP.
  • Gigabit Ethernet Port: For ultra-fast wired connections.
  • Compatibility: Certified with major ISPs like Spectrum, Cox, and Xfinity for speeds up to 1Gbps.

Documentation/User Guide

The included Quick Start Guide walks you through the setup process, from connecting your modem to your internet service provider’s network to getting online. It’s straightforward and easy to follow, even for those who are not tech-savvy.

Set Up Process and Installation

Installing the Netgear CM1000 takes just 5-10 minutes with no tools required – simply connect the coaxial cable, Ethernet, and power cables.

Be sure your cable internet service is already activated before getting started. Here are the quick install steps:

  1. Connect the coaxial cable from your cable wall outlet to the modem’s coax port. Use existing cables or buy a new RG6 coax cable.
  2. Plug one end of an Ethernet cable (included) into your computer or router, and the other end into the CM1000’s Ethernet LAN port.
  3. Connect the included power adapter to turn on the modem. Allow 1-2 minutes for the modem to boot up and come online indicated by status lights on front.
  4. Login to your provider’s website and activate/register the new device using the CM1000 modem’s MAC address located on a sticker underneath.

And that’s it! The modem will automatically initialize by downloading configuration settings from your ISP. You can now connect WiFi routers, computers, streaming boxes and more. Consider upgrading your home router or networking equipment if needed to take advantage of faster gigabit speeds.

NETGEAR Service and Support

The Netgear CM1000 comes with a relatively short 1 year limited hardware warranty. Out of warranty replacements may have refurbished external casing but internal components are new.

Netgear also only provides 90 days of complimentary technical support. After this, you’ll need to purchase a support plan for continued help troubleshooting connectivity issues or other problems operating the modem. Support reps by phone tend to be less knowledgeable than other brands like Arris or Motorola. But they can initiate RMA replacement if needed.

ProSupport extended warranties add 1 year ($20), 2 years ($30) or longer coverage at very reasonable prices, plus VIP phone line access, express replacements, and other perks. For peace of mind, it’s worth budgeting a few dollars extra per year.

NETGEAR Cable Modem DOCSIS 3.1 (CM1000) Gigabit Modem, Compatible with All Major Cable Providers Including Xfinity, Spectrum, Cox, For Cable Plans Up to 1 Gbps,Black

 in stock
9 new from $159.00
23 used from $72.00
Free shipping
as of April 5, 2024 6:31 pm

Who Should Buy?

The NETGEAR CM1000 is an excellent choice for:

  • Tech Enthusiasts: Who demand high-speed, reliable internet for gaming, streaming, and more.
  • Home Office Users: Professionals working from home who need a dependable internet connection.
  • Anyone Looking to Save Money: By eliminating monthly modem rental fees from their ISP.

What Users and Reviewers Say

The Netgear CM1000 consistently earns high praise across thousands of customer reviews:

  • Easy setup and just works after plug and play installation.”
  • “Internet speeds are blazing fast…in love with this modem!”
  • “Future proof for new gig speed plans. Worth buying to stop renting from Comcast.”
  • “Small footprint and doesn’t get hot like my old rented gateway.”
  • “Wish it had more than one Ethernet port, but can’t complain for the price.”

The most common themes in user reviews are appreciation for the fast gigabit speeds, reliable connectivity, and simplicity to get up and running. People upgrading from older modems or ISP-rented equipment see immediately noticeable speed boosts – especially when paired with a newer WiFi 6 router.

Some DOCSIS 3.1 alternatives score slightly higher for warranties, total throughput or form factor. But reviewers widely recognize the CM1000’s unmatched value and breadth of ISP support.

Top Alternatives

The Netgear CM1000 is a top-selling DOCSIS 3.1 modem thanks to dependable performance and wide compatibility. But a few alternatives also worth considering are:

Arris Surfboard SB8200

  • 2 x Gigabit Ethernet ports with 2Gbps total
  • 2 year warranty
  • Simple design matches modern decors

Check out the Full ARRIS SURFboard SB8200 Review

Motorola MB8611

  • 2.5G Ethernet port supports multi-gigabit
  • Broadcom chipset balances speed & stability
  • Tends to run warmer than Netgear

Checkout the full Motorola MB8611 Cable Modem Review

Netgear CM2000

  • Future-proof 2.5G LAN port
  • Higher max speeds up to 2.5Gbps
  • More expensive than CM1000

Checkout the full Netgear CM2000 Review

The SB8200 or MB8611 are both strong alternatives to pair with WiFi 6 mesh kits in the quest for true multi-gig speeds over 1Gbps. Shop around for whichever best matches your budget and internet plan speeds.

And if planning to stick with cable internet for 5+ years, consider investing in the CM2000. The 2.5G Ethernet port leaves headroom to continue upgrading internet packages over time without replacing modem.

Bottom Line

The Netgear CM1000 DOCSIS 3.1 modem offers an compelling mix of fast gigabit speeds, broad ISP compatibility, reliability and affordability. While the max throughput is capped at around 1Gbps, most households are nowhere near needing 10Gbps-grade multi-gigabit speeds quite yet.

Still, if you want to eliminate rented equipment fees that typically waste $150 per year AND finally unleash true gig speeds for large downloads and low latency online gaming, the CM1000 is an prudent option with eyes towards the future.

Combine the CM1000 with an updated WiFi router like Mesh systems with dedicated backhaul support, and you’ll enjoy a state-of-the-art home networking setup capable of keeping pace for years down the road.

Last updated on April 5, 2024 6:31 pm

Frequently Asked Questions

Is it compatible with my ISP?

The CM1000 is compatible with most major cable providers, including Xfinity, Spectrum, and Cox.

Can it handle Gigabit internet speeds?

Yes, it’s designed for plans up to 1 Gbps, making it suitable for high-speed internet packages.

Do I need a separate router for WiFi?

Yes, the CM1000 is a modem only and requires a separate router for wireless connectivity.

Is it difficult to set up?

No, the setup is straightforward, with a Quick Start Guide included to help you through the process.

Can I use it with a mesh WiFi system?

Absolutely, the CM1000 can be connected to any WiFi router, including mesh systems, for extended coverage.

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