Head-to-head · Best Standalone DOCSIS 3.1 Cable Modems

Motorola MB8611 vs NETGEAR Nighthawk CM2000

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.

The short answer

Motorola MB8611 comes out ahead by a narrow margin (4.2 vs 4.1). The gap is mostly about high-speed wired connection users willing to accept firmware risks — read the strengths below before deciding.

Higher ratedRanked #3 in Best Standalone DOCSIS 3.1 Cable Modems

Motorola MB8611

4.2

1 sourceall derived

The Motorola MB8611 is a DOCSIS 3.1 modem with a 2.5Gbps Ethernet port and support for up to 32 downstream and 8 upstream channels. Tech Reviews called it a great modem, pointing to its backward compatibility and AQM for low-latency performance. Firmware is the weak spot: users have reported stability problems, particularly on version 21.3.7, and one switched to an Arris S34 after prolonged trouble. It's approved for Comcast Xfinity, Cox, and Spectrum. Choose it for fast internet, not if you need voice capabilities or can't tolerate firmware instability.

Strengths

— 2.5Gbps Ethernet port for high-speed wired connections
— Fast DOCSIS 3.1 speeds with support for 32 downstream and 8 upstream channels
— Backward compatible with DOCSIS 3.0

Watch-outs

— No voice capabilities
— Has firmware issues reported by some users (specifically 21.3.7 firmware causing instability)

Check Price on Amazon Full review →

Ranked #4 in Best Standalone DOCSIS 3.1 Cable Modems

NETGEAR Nighthawk CM2000

4.1

1 source$249.99as of Jul 31

The Netgear CM2000 Nighthawk is a DOCSIS 3.1 cable modem rated to 2.5Gbps, which suits people on faster internet plans. Customer reviews split: some report a real speed jump over older models, others say it performs no better than the CM1200. Setup itself is straightforward, but getting the ISP to activate it can be a fight. Reddit users and Crutchfield reviewers landed on both sides, with the Comcast/Xfinity activation process drawing most of the complaints. It makes sense on a multi-gigabit plan and less so on a standard Gigabit connection.

Strengths

— Supports DOCSIS 3.1 technology for up to 2.5Gbps broadband speeds
— Easy setup process with standard web interface accessible at 192.168.100.1
— Compact design with clear status lights for troubleshooting

Watch-outs

— Does not provide noticeable speed improvements over older CM1200 model for some users
— Requires ISP activation which can be problematic and time-consuming

$249.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Motorola MB8611

The Motorola MB8611 supports 2.5Gbps Ethernet, unlike the Arris SB8200 which is capped at 1Gbps, but it's prone to firmware issues compared to the Netgear CM1000 which offers more stable performance. Unlike the Motorola MB8600, it doesn't support 6Gbps WAN speeds, and unlike the Arris SBG8000, it lacks integrated Wi-Fi.

NETGEAR Nighthawk CM2000

The Netgear CM2000V supports 2.5Gbps speeds, unlike the Arris SB8200 which is capped at 1Gbps, but it's less reliable than the Motorola MB8600 in terms of setup ease. Unlike the Motorola MB8611, it lacks 2.5Gbps Ethernet support, and unlike the Arris SBG8000, it doesn't include integrated Wi-Fi.

Specs side-by-side

Spec	Motorola MB8611	NETGEAR Nighthawk CM2000
Docsis Version	3.1	DOCSIS 3.1
Downstream Channels	32	32
Upstream Channels	8	8
Dimensions	7.25"L x 2.25"W x 7.88"H	6.8 x 3.7 x 8.2 in
Max Download Speed	2,500 Mbps	2.5Gbps
Ethernet Ports	—	1x 2.5Gbps/1Gbps LAN, 1x Coax
Weight	—	1.02lb

← See the full ranking of best standalone docsis 3.1 cable modems