Arris Touchstone CM8200A DOCSIS 3.1 Ultra Fast Cable Modem...

Most Helpful Review

"This cable modem is 5 stars: it works as expected: connected to Comcast in the SF Bay area and I am getting DOCSIS 3.1 enabled 32 channels down and 4 channels up with ping times of 10ms, download speeds of 160 Mbps, and upload speeds of 6 Mbps. YMMV of course. Check them out for yourself on the modem's built in web app at 192.168.100.1 and once activated use www<dot>speedtest<dot>net to determine throughput.A couple of things to note is this is the North America version and once connected, look for the front panel green lights to turn blue which indicates DOCSIS 3.1 connectivity.Ye olde Motorola Surfboard DOCSIS 2.0 had 4x4 channel support. On the Comcast 150 Mbps plan, the CM8200A doesn't make any noticeable difference. Perhaps 4K movies from Netfix and Prime are buffering faster, but it wasn't really a problem before. So keep that in mind if you are upgrading. I upgraded because Comcast said my old modem was no longer supported, I cut the cord recently so I'm watching more videos, and I like to find great deals to run the latest equipment. As another point of reference, I had the 60 Mbps plan with the DOCSIS 2.0 4x4 cable modem for about 3 months and never had a problem watching 4K HDR or Dolby Vision movies. Typically, 4K requires about 25 Mbps download speeds.As many have mentioned, this cable modem will work on Comcast even though it is not listed as a supported device. Tell your Comcast technician it is an Arris Surfboard SB8200 and give them the MAC address listed on the bottom. For me, it didn't work until I rebooted it after waiting the recommended 30 minutes.Next, I am taking off a star because of the seller Chommy85. Not that they are horrible: I did receive the product sooner than expected, it was a great deal at $84 delivered, it is lightly scratch as expected for a used product, and it does work as described above. However, the product was shipped as loose parts in an unpadded bag from USPS. This included the modem, the power supply and an Ethernet cable. These are not delicate parts, but I do expect them to be wrapped securely in box. Now the next Chommy85 issue is more debatable: the price went up $50 dollars since I purchased it 4 days ago. This may be because the modems left in inventory are not scratched, less used, or the market demand is higher. Don't know, but it does make this not as great a deal at about $50 less than a new SB8200. I know I would have purchased the DOCSIS 3.0 SB 6190 new, rather than this modem used, at the new price and saved over $30.Finally, you can find reviews of this modem (OK, the SB8200) and other recent modems here: mbreviews<dot>com/category/modems Frankly, unless you are running a business this DOCSIS 3.1 modem is likely over spec'd for what you can actually use in a home network. But if you find a great deal on it, be assured the CM8200A won't be the problem behind any bandwidth issues on your network for years to come."