I have xfinity performance pro which is rated for 150 mb/s down and 5 mb/s up. I've been using the Arris SB6141 modem which is 8 channel down x 4 channel up, great modem, no issues but it's speed maxed out at 120 mb/s down and 5 mb/s up. I figured what the heck might as well get the speed i'm paying for, so I purchased the Motorola SB7621 which is 24 channel down x 8 channel up. Internet speed is now 180mb/s down and 6mb/s up with a ping of 19ms. I am happy that I am now getting the speed I am paying for. Yes the upload speed didn't change much but that is because xfinity does not support 8 channel up in my area. This means even though this modem supports 8 channel up it only shows 4 active up channels when you log into it, this is not the modems fault, this is xfinity's doing. The download channels are fine, all 24 channels show up and are active. Yes, I could have purchased a 16 channel down and 4 channel up modem and received the same current speeds but at the time of purchase this modem was less than or the same amount as all the 16 x 4 modems. By buying this Motorola I can upgrade my internet speed down the road and still be covered. Another good thing is that this modem has the Broadcom chipset not the Intel puma.
The modem comes with good instructions and is well packaged. Setup was a breeze. I didn't have to call xfinity. All I did after I hooked up just the modem to my PC was navigate to motorola.com which brought up the xfinity activation page. Then just log in with your xfinity credentials and follow the prompts. Very easy and welcomed as I didn't want to sit on the phone talking to xfinity support.
I never do reviews but I figured this little box deserved one and hopefully this helps someone.
I'm using the MB7621 on an Xfinity Extreme 250 plan (250Mbps down/10Mbps up) as an upgrade from a SB6141. I've consistently seen advertised speeds since installing this modem, setup was easy, and over the last few weeks its been completely reliable with no downtime.
This cable modem is a beast (in a good way)! A little over 7 years ago, I bought the Motorola SB6120 to replace the crummy cable modem that Comcast charged me monthly to use. I had no problems with the SB6120, but got an email from Xfinity saying I needed to upgrade my equipment. I guess because they have increased the speed on my service and the SB6120 is so old it may not be supported with updates from Motorola. OK...I paid $75 for the SB6120 and it probably saved me over $750 in monthly rental for 7+ years.
Decide first if you want DOCSIS 3.0 or 3.1 because the Docsis 3.1 is new and will probably be usable for years to come. Motorola only has 1 Docsis 3.1 cable modem available today which is the MB8600 and is almost twice the price of the Docsis 3.0 MB7621. If you compare the specs, the MB8600 is faster but at nominal 1000 Mbps and Comcast certified 400 Mbps, the MB7621 is way faster than my 150 Mbps service.
I got it today and got it activated and hooked up to my new Motorola MR1700 router. The process was fast and easy if you can figure what they are trying to say in the quick start guide. I activated with my notebook directly connected to the cable modem and the speed exceeded my 150 Mbps service by almost 30%. After direct wire of my notebook through the router, my speed was also exceeding my service speed at the same level.
The only way I can lose on this purchase is if Docsis 3.0 becomes obsolete in less than 8 months and I'll bet that is unlikely.
I recently (about a month ago) purchased this modem to replace the 100mbps modem provided by Spectrum. We upgraded our service to a 400mbps because we have a gamer in the house plus about 14 connected devices on our wi-if. The MB7621 is rated to provide up to 1000mbps as oppposed to 100mbps that the Motorola SB6141 tops out at. Every speed test I have performed since activating has delivered 375-395mbps. The difference is remarkable! Note: With Spectrum, I had to call them up and lt them activate and register the MB7621. It took maybe 5 minutes.
This is my second Motorola Cable Modem. My broadband internet provider, Charter at the time which I have been with for about 17 years now, provides a free of lease modem. I still have the one they issued me for my broadband telephone landline. But the one for internet didn't perform well and looked like junk so I purchased my first Motorola Surfboard because it had DOCSIS 3.0 and turned in the modem Charter issued me. Over the years my provider has upped their internet speeds and my first Motorola Modem always performed well. last year Charter became Spectrum and just recently my Spectrum upped my speed from 100mbs to 200mps free of charge, but I couldn't get the speed. I looked at the specs on my first Motorola and found it didn't have enough channels to go up to 200mps. I still have the old one and it still works great, but I purchased this one which does get over 200mps and will go up another 100 I believe. So long story short. Motorola has always been a great brand and having a higher DOCSIS and more frequency channels will get you all the speed your internet provider will supply.
Feature Product
- Model MB7621 is recommended for actual cable Internet service speeds up to 650 Mbps. A Full-Band Capture Digital Tuner ensures faster, more reliable Internet.
- This cable modem's one Gigabit Ethernet port connects to a WiFi router, computer, HDTV, game station, or streaming video device. Great for use with Whole Home WiFi or Mesh networks like eero, Google WiFi, and Orbi. (This cable modem does not have a built-in wireless router or telephone call capability. The Motorola MG7310, MG7315, MG7550, and MG7700 have a built-in wireless router.)
- Requires cable Internet service.Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, BrightHouse, CableOne, SuddenLink, RCN, and other cable service providers. ELIMINATE CABLE MODEM RENTAL FEES UP TO 156 DOLLARS PER YEAR.(Savings are shown for Xfinity and vary by cable service provider. No cable modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, Frontier, and others. Model MB7621 has no phone jack.)
- Setup is fast and easy using the Quick Start guide. Experienced USA-based Motorola customer support specialists are happy to help if you need them. Support is in English or Spanish.
- Attractive, compact design minimizes shelf space, improves cooling, and extends product life while looking great in any home or office. A two-year warranty plus rugged lightning and power surge circuits protect your investment. Includes phone and web support by friendly, professional USA-based technical support specialists. Phone support is provided in English and Spanish.
Description
Model MB7621 is a 24x8 1,000 Mbps DOCSIS 3.0 cable modem certified by XFINITY from Comcast for speed tiers up to and including Comcast Xfinity Extreme Pro Internet 400. The MB7621 is also approved by Charter Spectrum, Suddenlink, CableOne, RCN and more. Owning this modem eliminates modem rental charges that are up to $156 per year. With easy installation, high-speed, Broadcom IC technology, broad compatibility, and superb customer support, Model MB7621 is the perfect choice for almost any cable modem user. 24 X 8 performance means that up to 24 cable data channels carry data from the Internet, twenty-four times faster than DOCSIS 2.0; and up to 8 channels carry data to the Internet. A Full-Band Capture digital tuner helps assure consistently fast speeds from your service provider. MB7621 does not include a WiFi Router or an adapter for telephone service (sometimes called cable telephone or digital telephone service). It includes a 10/100/1000 Gigabit Ethernet (GigE) port for a high-speed connection of a WiFi router, computer, HDTV, game station, or other Ethernet-capable device. Setup is fast and easy with a few quick steps set out in a Quick Start guide. Experienced USA-based customer support specialists are ready and willing to help if you need them. Model MB7621's compact, attractive design saves space and looks good in any home or office. This product is backed by a two-year warranty and features ruggedized lightning and power surge circuits to provide additional protection of your investment. DOCSIS 3.0, 2.0, and 1.1 support and Cable Labs certification ensure compatibility with services nationwide. Best of all, the MB7621 offers the value, performance, and attention to quality that continue to make Motorola the leading brand of cable modems. Please note that the MB7621 plugs easily into computers, HDTVs, and other Ethernet-capable devices including any router of your choice, but the MB7621 does not have a built-in Wi-Fi router or phone jack.
Excellent modem! Upgraded from the SB6120 after it started dropping connections after 7+ years of use. Quick to get it up and running with Comcast's online activation. The bump in downstream channels was evident from the start, sites (appeared to) load more quickly and Speedtest noted a decent bump in download speed vs. the 6120. Upload is about the same, but that's to be expected. So far no complaints.
This Motorola MB7621 24x8 cable modem supports DOCSIS 3.0, as required by my provider, Suddenlink (Altice). I bought it to avoid the $10 monthly rental fee levied by my provider as I recently upgraded my internet speed to 400mbps. This Motorola product seems well built and has the Broadcom chipset in it, which is reported to be very superior to its competitor, the problematic Intel Puma chipset which is found in many new cable modems. I have it mated to a new Motorola MR2600 dual band router. (NOTE: Motorola makes a combo 24x8 cable modem/AC 1900 wifi router, the MG7700, which incorporates both functions. I wanted a wifi router with four-six external antennas for better wifi distribution). So far, the Motorola MB7621 cable modem has performed very well, with no outages. I hope for good longevity from it as I have purchased Motorola Surfboard modems in the distant past. Motorola tech support is reported to be excellent, although I did not use it. This cable modem runs fairly cool; some 15F above ambient temp even sitting in the enclosed cabinet.
Use-Case/Set-up:
* Provider: Xfinity/Comcast
* Wireless Router: TP-Link (model named as "Archer" by TP-Link)
* Modem: Motorola Model MB7621 (24x8)
* Connection/Wiring: Modem input line is from a Coax-splitter (line shared with Xfinity set-top/cable box)
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Thus far, this has proved to be a very reliable modem. (This modem is currently, as of this review, on Xfinity's/Comcast's official 'Supported Hardware' list.)
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Overview:
* I have not seen any data through-put slow-down or video/audio lag--even during what are typically 'peak use' times of the day.
* Data pull-down (downstream) speed remains consistently high.
* Set-up was simple, quick, and easy.
* The modem functions very well in conjunction with a Wireless Router made by a different company.
* Data transfer speeds between the modem and the wireless router are also consistently high.
* The silicon chip used in this generation of Motorola's Cable Modem is well designed and manufactured; and while it is more expensive, thus far it has been worth it.
* Due to the heat output, this modem does need to be kept in a well-ventilated area. Using this modem in a closed-off environment would definitely cause: a decrease in lifespan, a performance degradation, or both.
* Great modem; highly recommended.
My internet was running a bit slow downloading Netflix and Amazon Prime movies on my smart TV, so I thought that upgrading my level of speed with my cable company to15mbps would do the trick. It was still running slow after the upgrade. I updated the software on my router, which helped a lot, but still not running optimally. The last step was to upgrade my outdated modem. One publication gave the Motorola MB7621 modem an excellent rating but I was still hesitant to purchase it for fear of being complicated to set-up, which might then cause me to spend another $100 to hire Geek Squad to set it up. Sometimes you just got to take a chance on life, so I took the plunge and bought it because the Motorola website said it would provide technical support if I ran into any problems.
I ordered the modem on Amazon, and received it the next day. My fears were for naught because the set up was super easy and I am not a tech savvy person. I followed the instructions in the manual, called my cable company to register my modem and I was up and running in about 5 minutes. I think I have solved my problems with downloading movies. I'm getting a good connection. I'm keeping my fingers crossed. Call me a happy camper!
I did a ton of research on a modem for our Infinity high speed cable. This replaced a surfboard Motorola modem that we had purchased in 2009. The setup was very simple, it hooked right up to our existing Netgear router, and our speed tripled. So far, we're very happy with this purchase.
Just a note on buying any modem. The ratings on Amazon can be skewed and all over the place. There is no modem that doesn't have a few bad ratings. Some people have difficulties installing a modem, or making it work, and hop on Amazon and give it a bad rating. Check ratings from tech companies, where you will get non-biased ratings of products.
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