This is a review of the ARRIS (SB8200) - Cable Modem. Tip: Before selecting a new cable modem, go to the website of your ISP and review their list of "approved" cable modems. You could also call your ISP to find an "approved" modem. Your ISP may prefer that you to use one of their modems. Sometimes their modems are provided at no additional cost, so you might be able to save some money. I verified that this Arris SB8200 cable modem was on the "approved" list for my local ISP (Spectrum). While I am very happy with the Arris SB8200, you might consider finding an "approved" modem that has come out more recently (a newer model). Short review: I recently replaced my 10-year-old cable modem with the Arris SB8200 modem. I am on a 400 Mbps (megabit per second) plan with Spectrum, but I was only getting 90 Mbps. With the new modem, internet speed more than quadrupled (to 480 Mbps). I am quite pleased. I have read reviews by people who claimed to have had bad experiences using this modem on a Sprectrum system, but I had no problem whatsoever. Installation and activation were very easy and quick. The self-installation via the web did not work for me, but I easily activated the new modem with a quick phone call with Spectrum (no wait on phone; less than 10 minutes to activate). I discovered some problems with my home network that I discuss below, but these were completely unrelated to the new Arris modem Have MAC ID (from box or modem label) before you activate: You must report the MAC ID for the new modem to your ISP to activate, so have it handy before you start. Important Tip: The rest of this review concerns internet speed issues from causes other than the modem. The most important lesson learned: Make sure you replace all your old-style Cat5 Ethernet cables with newer Cat5e or Cat6 cables. Cat5 cables are limited to 100 Mbps (megabits per second) and may be “bottlenecking” your system. My system: My home was built with an Ethernet system that supplies at least one Ethernet outlet in every room. I have been using Ethernet instead of WiFi. The Cat5e Ethernet cables supplying this system come together in a central distribution box, which houses the cable modem and a router. In some rooms, Ethernet switches (splitters) are used to share an Ethernet outlet among several devices. Of course, internet speed may drop due to any of these components. Before installation: -- Studied the Quick Start/Installation guide (available online) before modem arrived. -- Watched a 4-minute Sprectrum video on how to install a new cable modem. -- Learned what the various lights on the modem mean (including solid and flashing lights). Cable modem installation with Spectrum: Note: For this installation, Spectrum service was already established (on old modem). -- Turned off computer -- Connected modem directly to computer with a new Ethernet cable (Cat5e), bypassing router and home Ethernet system -- Turned on modem: Based on behavior of lights, modem appeared to update its firmware (automatically). After about 6 minutes, lights indicated modem was ready. -- Turned on computer: Opened web browser and attempted to go to the Spectrum self-install web page. Would not connect. -- Called Sprectrum to activate modem: Gave the MAC ID of new modem to pleasant costumer service rep. After updating the MAC ID, rep remotely reset modem. -- Ran speed test: Speed had been 90 Mbps with old modem, it was over 400 Mbps with new modem. (Glory be!) Lessons learned about home’s Ethernet system: -- After the modem had been activated, I moved it into the Ethernet cable distribution box and hooked it up to the old router. Ethernet speed was only 90 Mbps, just like when using the old modem. Hmmm. -- Installed the new router, Ethernet speed was still only 90 Mbps. Hmmm. -- Turned on WiFi and connected computer via WiFi: Speed jumped to over 400 Mbps. Great! -- Turned off WiFi to test Ethernet system. The switches/splitters are gigabit rated, so I hoped they were not the cause of the "bottlenecking." -- Replaced all the Ethernet cables with new Cat5e cables: Ethernet speed jumped to 480 Mbps. Problem solved! -- Besides higher internet speeds for the computers, Youtube videos on the television are much, much improved. Very pleased. Summary: Your new Arris modem may (by itself) enable you to get much higher internet speeds. However, make sure all of your network gear (router, switches/splitters, and cables) can support 1 Gbps (gigabit per second). For example, if you have Cat5 cable anywhere in your system, your speed will be limited to 100 Mbps, so replace them with Cat5e or higher cables.

I prefer using my own cable modems for internet service. Given the speeds my provider offers, this modem is just right for the time being. I have used Arris routers for many years and none has ever failed or gotten flaky. When you go to set it up, call your provider; they will ask for the MAC number, have you connect it, and they may need to do some commissioning steps that take a while, but once done, should run like a top.

This is just my first week with this router. But so far, no complaints. Set up was simple with a minor glitch. Before I could get xfinity to connect to their service, the Arris app wanted to email something to me. There was no option for a text message. I got this model because it easily fills my needs at an affordable price. And it is small and does not require a lot of space. I have it paired with an eero6 router with two addition eeros.

I purchased the Arris SB8200 for Xfinity Gigabit Internet service as they have a deal for two years for the same price as the 400Mbps plan ($69.99). So in order to save almost $15 a month I decided to buy my own modem to replace my aging Motorola (Arris) SB6141. My SB6141 netted me 259Mbps down and 35Mbps up on my previous plan of 400Mbps down and 35Mbps up, which is great for a 8x4 channel Docsis 3.0 cable modem. So since Arris bought Motorola modem cable division I decided to get another one having had a great product with the 6141. The Arris SB8200 is also the only Docsis 3.1 modem with two Ethernet ports capable of doing 2Gbps down and is the most future proof of any modem on the market at the time of writing this review. And you can get a refurbished model for half the price which is even better! Inside the Arris SB8200 is a Broadcom BCM3390 chipset (a much needed change from the SB6190’s Intel Puma 6 chipset which had hardware bugs and caused them a lawsuit for good measure), 3GB of RAM, 128MB S34ML01G200TFV00 Spansion flash memory NAND and 16MB Macronix MX25L12805D SPI NAND flash memory. The SB8200 is capable of downstream bonded channels up to 32 SCQAM or 2 OFDM and upstream bonded channels up to 8 SCQAM or 2 OFDMA (32x8 SCQAM and 2x2 OFDM). The Ethernet ports are only Gigabit Ethernet and therefore the Max you will get is 950Mbps average down and it will never be possible to the the boxes 10Gbps selling spiel. Even if you don't have Docsis 3.1 in your area or a Gigabit internet speed plan this modem will serve you for many years to come. And this modem has 3GB of RAM, which the other Docsis 3.1 modems have 256MB or less! RAM! Oh and with most providers (Xfinity included) you can call them and add a separate IP address for the second Ethernet port for a small fee (Xfinity charges like $5.95 if I'm remembering correctly). This would be great if you wanted to connect a gaming console directly to the modem for the best speeds and then connect your home router to the second. And eventually you'll be able to kick in 2Gbps by merging those two Ethernet ports! Setup of the device was quick and easy and you simply plugin the coxial cable, Ethernet cable to your device (router for 99% of the people) and power cable and you are off and running. A quick call to your internet provider (Xfinity for me) to add the HFC MAC address and the modem is registered and provisioned and I'm up and running within ten minutes. Xfinity will try to send out a tech but you can get them to override it if you know what you are doing. Gigabit internet can be extremely temperamental as we'll discuss later which is the reason Xfinity requires sending out a tech on all Gigabit plan installs. And again this is simply a modem so you will need a router if you want wifi or the ability to connect more than one device. The performance of the Arris SB8200 is top notch and I was easily able to pull my provisioned modem speeds from my Xfinity service. I was able to test 1.4Gbps down (Fast.com also includes backend speed as actual can only be 950Mbps as I mentioned above) and 45Mbps up. On Speedtest.net my tests are almost always 930-960Mbps (or near that) down and 40-50Mbps up. These speeds are AMAZING and just my upload speed is faster than most people's download speeds! Right now Xfinity is only utilizing Docsis 3.1 for the downstream channels so the modem lights will have a blue light for downstream and a green light for upstream (this is not an error or bug). My issues arose with my Xfinity service and resets, slow speeds (300Mbps Max down), etc. Xfinity sent out a tech and that did nothing. So another rech came and found a ton of ingress coming from 4 lines on my tap. He trapped them off and I was up and running with Gigabit speeds again. Then the resets started, at night almost every 10 minutes! It was only happening between 10pm and 7am average, EVERY NIGHT! I had more techs out, supervisors and more supervisors! After a month (and many hours of my time and speaking up) the issue was resolved as it was a bad line amplifier which was causing noise and caring my upstream to spike into the high 50s, which triggers resets on the modem and t3/t4 errors. Now my neighbors were having issues on certain channels and slow internet but their modems WERE NOT RESETTING! And we knew my modem wasn't bad as it was fine for over 12 hours a day with no errors at all in the log until night began to fall everyday. And In fact my neighbors never lost internet, EVER but my internet was almost useless at night time. So the Arris SB8200 is extremely sensitive to t3/t4 errors and the threshold for errors and resets is much higher for the Xfinity owned gateways and modems. Also Arris had out out a firmware update previously about severe sensitivity to t3/t4 errors and I had the latest version but I was still having issues so they still need to work on this. If you are experiencing issues with your Arris modem navigate to http://192.168.100.1 and you'll be able to see basic signal information, modem error logs, modem and firmware info. You can use this information and post it in the support forums to get help and diagnose any problems. But now that the line and backend errors are corrected it's smooth sailing and I'm saving myself a ton of money (the new Xfinity modem charge is $14 plus tax and it will be $15 by the beginning of 2020 so you pay for the modem in a little over a year) every year and you'll have the newest technology that is even better than the Xfinity modems and gateways, many of which use the Puma 6 chipset which I mentioned above (causing severe lag and timeouts which can kill online gaming or video watching). So I'm paying $69.99 and getting Gigabit speeds of 950Mbps down and 48Mbps up which is a great deal hands down and you won't find speeds that cheap ANYWHERE ELSE! The Arris brand is keeping the Motorola spirit alive and kicking which is great for competition! The Arris SB8200 is the best modem you can buy for your money right now and if you can find a refurbished unit on Amazon even better (they didn't have any when I bought mine but three weeks later they did and for $100 cheaper)!

I purchased this item used-like new, which made me very nervous not knowing what I was getting, but so far I love it. I had an older netgear modem/ router with 3.0 docsis and my speed has more than tripled with the Arris having 3.1 with wifi 7. My service is 600mb and my phone is running at 670mb giving me more speed than my internet provides. I just hope this unit lasts for as long as my netgear unit has.