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Netgear CM400 — Review & Specs | Pricepect | Pricepect

Home ModemsNetgear CM400

Netgear CM400 — image 1

Netgear

Netgear CM400

$64.99

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CM400-100NASBlackDOCSIS 3.0 No Warranty

Expert Review Analysis

The NETGEAR CM400 is an entry‑level DOCSIS 3.0 cable modem offering up to 340 Mbps download and 122 Mbps upload via 8x4 channel bonding, a single Gigabit Ethernet port, and broad compatibility with major US cable providers.

✓ Best for: Budget‑conscious households or small offices with cable internet plans up to 100 Mbps that already have a separate Wi‑Fi router and want to replace ISP‑provided rentals.✗ Not ideal for: Users requiring gigabit‑speed internet, built‑in Wi‑Fi or VoIP, future‑proof DOCSIS 3.1 capability, or those on DSL, fiber, or satellite connections.

Pros

✓High‑speed 8x4 channel bonding delivers up to 340 Mbps download and 122 Mbps upload for fast streaming and gaming.
✓Built‑in Gigabit Ethernet RJ‑45 port provides a reliable wired connection to any router.
✓Compact desktop form factor (5.8 × 3.8 × 1.8 in) and low 12 W power draw reduce energy consumption and save space.

Price History

Current

$64.99

Average

$57.67

Lowest

$17.96

Highest

$69.97

Price trend (90d):+18.2%

Best Seller Rank History

Now#93Best#55Worst#232 +43

Lower = better sales rank

Specifications

Connectivity

Ethernet Port1 Gigabit Ethernet (10/100/1000)

Design

ColorBlack

Form FactorDesktop

Height52.07 mm mm

Width182 mm mm

Length/Depth217.17 mm mm

Features

WiFi Built-inNo

VoIP SupportNo

General

BrandNetgear

ModelCM400-100NAS

WarrantyNo Warranty

DOCSIS Standard3.0

CableLabs CertificationCertified

Network

IP SupportIPv4, IPv6

Performance

Maximum Downstream Speed340 Mbps Mbps

Maximum Upstream Speed122 Mbps Mbps

Flash Memory128 MB MB

RAM128 MB MB

Power

Power Consumption12 W W

Voltage100-240 V

Operating Temperature0°C to 40°C

Maximum Humidity90% (non-condensing)

Environmental

Operating Temperature32°F to 104°F (0°C to 40°C); max humidity 90% non‑condensing

Memory

Flash and RAM128 MB flash and 128 MB RAM

Standards

DOCSIS and IP SupportDOCSIS 3.0, IPv4/IPv6, CableLabs certified

Dimensions & Weight

Height2.05 inches

Width7.17 inches

Depth8.55 inches

Weight1.08 pounds

Research Sources

approvedmodemlist.com

flyteccomputers.com

content.syndigo.com

buyyourownmodem.com

comptechdirect.com

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User Reviews

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4.2

(1,573 reviews)

✓

CableLabs certification guarantees compatibility with major cable operators such as Xfinity, Cox, Spectrum, and Charter.

✓Simple CD‑less installation with auto‑sensing Ethernet port speeds up setup for non‑technical users.

Cons

✗No integrated Wi‑Fi or VoIP functionality, requiring a separate router for wireless networking.
✗DOCSIS 3.0 limits maximum throughput to 340 Mbps, making it unsuitable for gigabit‑speed internet plans.
✗Reported inconsistencies in listed memory (8 MB vs 128 MB) and weight may cause confusion for buyers.
✗Lacks future‑proofing as newer DOCSIS 3.1 modems become standard for higher‑speed services.
✗Not compatible with DSL, satellite, or fiber‑only ISPs, restricting use to cable broadband.

From Expert Reviews

Praised by Experts

✓High‑speed 8x4 channel bonding praised for delivering up to 340 Mbps, eight times faster than DOCSIS 2.0.
✓CableLabs certification highlighted as a guarantee of reliability across major cable operators.
✓Easy, CD‑less setup and auto‑sensing Ethernet port noted for quick installation by reviewers.
✓Gigabit Ethernet port valued for providing a stable wired backbone to any router.
✓Strong price‑to‑performance ratio emphasized as a cost‑effective alternative to ISP rentals.

Criticized by Experts

✗Limited to DOCSIS 3.0, making it less future‑proof for emerging gigabit‑plus plans.
✗Absence of built‑in Wi‑Fi or VoIP means additional hardware is required for full home networking.
✗Performance ceiling of 340 Mbps may not satisfy users with higher‑speed service subscriptions.
✗Minor spec discrepancies (memory, weight) noted as potential quality‑control concerns.
✗Not suitable for DSL or fiber‑only providers, limiting its market applicability.

From User Reviews

Users Love

✓Users report straightforward plug‑and‑play installation without needing a CD or software.
✓Consistently achieves advertised speeds on 100 Mbps ISP plans, satisfying basic streaming needs.
✓Eliminates monthly ISP modem rental fees, providing noticeable cost savings for budget‑conscious households.
✓Gigabit Ethernet port delivers stable wired connection, praised for low latency gaming.
✓Compact size fits easily into small home or office spaces without clutter.

Users Complain About

✗Some users note the lack of built‑in Wi‑Fi forces purchase of an additional router.
✗DOCSIS 3.0 technology is seen as outdated for newer high‑speed internet packages.
✗Reports of refurbished units occasionally arriving with cosmetic defects or missing accessories.
✗No support for VoIP services, limiting use for users who want integrated phone functionality.
✗Inability to work with DSL or satellite providers mentioned as a limitation.

Expert Opinion

Professional reviewers position the CM400 as a solid, budget‑friendly DOCSIS 3.0 modem that excels in simplicity, provider compatibility, and value, but they caution that its 340 Mbps ceiling and lack of Wi‑Fi make it less suitable for future‑proof or high‑speed deployments.

What Users Say

Everyday users appreciate the easy setup, reliable wired performance, and the savings from dropping ISP rental fees, while recurring concerns focus on the absence of Wi‑Fi, the outdated DOCSIS 3.0 standard, and occasional quality issues with refurbished units.

Common Complaints

Limited DOCSIS 3.0 throughput, no built‑in Wi‑Fi, spec inconsistencies (memory/weight), and occasional refurbished unit quality issues.

How It Compares

vs. NETGEAR CM600

Advantages

✓Higher channel bonding (24x8) supports up to 960 Mbps download for faster plans.
✓More future‑proof for upcoming gigabit‑plus cable services.

Disadvantages

✗Larger physical size and higher weight increase space requirements.
✗Higher price point compared to the entry‑level CM400.

Choose the CM600 for 300 Mbps+ plans or when future‑proofing is a priority; stick with the CM400 for basic 100 Mbps setups and tighter budgets.

vs. ARRIS SURFboard SB6183

Advantages

✓Supports up to 686 Mbps download, offering more headroom than the CM400.
✓Similar compact form factor with comparable weight.

Disadvantages

✗Provides fewer downstream channels (16x4) than the CM600, limiting ultra‑high speeds.
✗May be priced slightly higher than the CM400 while offering only moderate speed gains.

The SB6183 is a good mid‑tier alternative for users needing up to 400 Mbps, whereas the CM400 remains the most cost‑effective option for sub‑100 Mbps plans.

Rating Trend

Rating4.2/ 5Reviews1,573+-87 reviews +0.11