Product Comparison: NETGEAR CM1000 vs Motorola MB8600

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General Specifications
About the Product
The NETGEAR CM1000 Ultra-High Speed Cable Modem provides a connection to high-speed cable Internet with speeds up to 1 Gbps†. It is the industry’s first DOCSIS® 3.1 CableLabs Certified® cable modem, 10X faster than DOCSIS 3.0††. Working with DOCSIS® 3.0 and DOCSIS® 3.1 cable Internet service providers, it is the ultra-high speed cable modem ready for today’s service plans and future upgrades. Enjoy ultra HD video streaming over IP with 2x2 OFDM or 32x8 channel bonding giving you the fastest download speeds—even during peak hours.
This Cable Modem supports DOCSIS 3.1, the only cable modem standard that can deliver speeds over 1 Gigabit per second (Gbps). The MB8600 also has 32x8 support for the fastest possible speeds using the older DOCSIS 3.0 standard. The MB8600 provides high-speed Internet for a computer, router, HDTV, game station, or streaming media device. To give simultaneous Internet access to many devices, plug in any router you like.
Key Specs
ISP Compatibility
DOCSIS Certification
Downstream Data Speed
6000 Mbps
3800 Mbps
Upstream Data Speed
1000 Mbps
What customers say about "Key Specs"
NETGEAR CM1000 DOCSIS 3.1 Gigabit Cable Modem
  • The modem works so far. Our internet speeds are where they are supposed to be. Stop renting your modem and buy it!
  • I subscribe to the 150mps download speed and the results at were clocking me at over 165mps. I've run the test several times since then and the results remain the same. I haven't had any connectivity issues since its registration.
  • Comcast Blast speed with the 6183 was around 165 mbps and after I switched to the CM1000 it jumped to over 220 mbps wireless!
  • We are getting nearly identical speeds at the main router and at the satellite (over 230mbps down over wifi to an iPhone X). I am VERY VERY impressed with how easy it was to setup and how well it works.
  • I’m very disspointed with the speed. I pay for 200Mbps down and 10mbps up. My old docsis 3.0 surfband modem was able to pull 220Mbps down and 12 up. This modem wants to pull 170Mbps down and 4Mbps up.
  • For a DOCSIS 3.1 modem claiming to hit up to 6Mbps - this modem was not able to get close to even gigabit speeds. I had a veteran Comcast technical at my house for hours, trying to get this thing to work correctly.
Motorola MB8600 Ultra Fast DOCSIS 3.1 Cable Modem
  • My old modem wasn't slow, but I was shocked to see such a difference when loading websites, youtube, etc. Well worth the buy! I would almost compare this to the difference that the SSD made in computers over old standard hard drives.
  • Comcast recently upgraded their network to DOCSIS 3.1 in the Southwest Washington state area so I replaced my old Arris DOCSIS 3.0 cable modem with this one and immediately noticed a download speed increase to around 200 Mbps from around 120 Mbps!
  • Model is on the approved Comcast/Xfinity equipment list and works great. Compatible with their higher tier speeds at DOCSIS 3.1. No complaints with the product, as it's performed flawlessly during the first week.
  • Easily and quickly setup between my Xfinity cable and TP-Link WiFi router. Went to the Xfinity activate link as described in the documentation and was up and running in a minute or so. My download and upload speeds are about 10% faster now without any change in my plan. Nice!!
  • I'm guessing the 3.1 firmware still is in beta. This modem will lose it's downstream connection for no apparent reason. Hopefully the manufacturer will find out what's causing this and work with Comcast to fix the issue.
Size & Weight
8.8 in.
7.875 in.
5.4 in.
2.25 in.
5.9 in.
7.25 in.
0.84 lbs.
1.1 lbs.
Number of LAN Ports
Wi-Fi Connection
Other Ports
What customers say about "Ports"
NETGEAR CM1000 DOCSIS 3.1 Gigabit Cable Modem
  • Ethernet port is bright yellow. Sounds silly, but when you're reaching into your darkened equipment rack, a bright yellow port really helps.
  • It’s ok. What they don’t tell you is it will NOT work with your current cable tv account. Because it doesn’t have a telephone port in back.
  • Bought this about a month ago, and it seems like the Ethernet port has failed. I've swapped out with another router and I can receive internet just fine, but when I plug it back in, the router and my laptop wont receive internet.
  • Buy this as the cable rental replacement, but the ethernet port lost connection all the time.
  • I wish the unit had two gigabit LAN ports so I can run one to my router and the other to my OOMA phone box or switch for OOMA and Google Phone.
Motorola MB8600 Ultra Fast DOCSIS 3.1 Cable Modem
  • Supports bonded (two ethernet cables) connection to ISP if you are lucky enough to actually have Gigabit internet service. One LAN connection only supports up to 960 Mbps or so speeds, so bonded is a plus.
  • 4 LAN ports if you want a direct connection (e.g. if your router doesn't support bonded ethernet– most don't– then you can directly connect to your modem with 4 available ports).
  • Comes with power cable, ethernet cable, velcro tie for cables, and a wrench to tighten the coax cable.
  • It comes with 4 ethernet ports that can be linked together to get up to 4gps of data throughput when cable operator will provide them.
  • Only one port can be used. The rest are for bridging signals once that functionality is available from ISP. You can only use one of the four Ethernet ports on the rear
Wired Speed
1000 Mbps
1000 Mbps
Number of Download Channels
Number of Upload Chanels
Power On/Off, Reset
Power On/Off, Reset
2 OFDM downstream & 2 OFDM upstream channels for DOCSIS 3.1 connections, Works with XFINITY® from Comcast, Fast web based self-activation for XFINITY customers
Fast, easy setup using Quick Start, 5 status-reporting LEDs on the front panel and 2 LEDs for each Ethernet port on the back panel., Ruggedized lightning and power surge circuits protect your investment., Space-saving unit minimizes shelf space and improves cooling for reliable performance.
What customers say about "Features"
NETGEAR CM1000 DOCSIS 3.1 Gigabit Cable Modem
  • We have Comcast, this modem is supported by Comcast and it’s super easy to set up. It took less than ten minutes. If you have Comcast there are specific instructions to set it up. Very easy.
  • I'm also using the NETGEAR Nighthawk X6 AC3200 Tri-Band Gigabit WiFi Router (R8000) with the CM1000. They pair great together and I've yet had to reboot this modem.
  • Fool proof airflow design. No matter which way it is oriented, surrounding air will provide cooling
  • I expect the 32x8 channel bonding to be future proof for my needs.
  • Only comes with a cat 5 cable (yes, no a cat5e or cat6 cables, a cat5 cable!!!)
  • As a D3.1 modem, it only supports 1.0 Ghz downstream, and 85 Mhz upstream.
  • Should be mounted vertically for proper heat dissipation. Not an issue for me, but could make fitting in your equipment rack difficult (height= 6.75in or 17cm).
Motorola MB8600 Ultra Fast DOCSIS 3.1 Cable Modem
  • With this modem, I have DOCSIS 3.1, 8x downstream channels and most importantly, AQM. AQM (Active Queue Management) is needed for high bandwidth connections such as Cable Modem connections.
  • The modem itself is very durable feeling. Setup was a very easy. I'm actual obtaining equal if not better speeds than my previous Netgear model. So definitely a modem I would purchase again.
  • Runs great, uses Broadcom chipset. Small. Reasonably priced. 32x8. Modem admin name is changeable. Can do up to 4 bound ethernet ports for 4gpbs if you can afford it.
  • LEDs are not bright, and only the ethernet one blinks occasionally. Comes with a wrench for tightening coaxial heads.
  • Just that they advertise this to work really easily with XFINITY. At least that was my impression. I still had to contact XFINITY to get this modem set up. Was about an hour total online chat with them.
  • Instructions say to go to but it doesn't load, you actually want /activate. Before realizing this, I tried to activate remotely from my xfinity account and it said activated, but it wasn't.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
2 year(s)
CE, FCC, Certified by Comcast XFINITY
CableLabs®, CE, Comcast XFINITY®, Cox®
Other Information

Other reviews