For the past 6 years, I have been using the
Motorola/Arris SURFboard SB6141 Cable Modem
for Comcast Xfinity service in the San Jose area. The modem worked fine until
I recently tried to upgrade my
Asus RT-AC66U Router to Asus RT-AC88U. During this time, the
SB6141
would not connect to Xfinity for
multiple hours.
When I logged into the Xfinity website, I learned that the SB6141 was no longer supported by Comcast. I decided to upgrade to a supported version. After researching online, I read an interesting article in the Wirecutter regarding cable modems. The Motorola MB7621 24x8 DOCSIS3.0 was highly recommended. I decided to purchase it on Amazon.com.
Installing the new Motorola MB7621 was relatively straightforward. After disconnecting my previous modem, I reconnected the power, coaxial, and Ethernet cables to the new modem.
Comcast requires all cable modems to be registered. To do so, I visited https://www.motorola.com and was immediately redirected to Comcast's registration page. I logged into my Comcast account and registered the new Cable modem.
In terms of performance, I did not measure any significant improvement in download or upload speeds or access latency.
My speedtest.com showed the following results:
One significant improvement I noticed was how quickly the new Cable modem connected to Xfinity. It was much faster than the older SB6141.
When I logged into the Xfinity website, I learned that the SB6141 was no longer supported by Comcast. I decided to upgrade to a supported version. After researching online, I read an interesting article in the Wirecutter regarding cable modems. The Motorola MB7621 24x8 DOCSIS3.0 was highly recommended. I decided to purchase it on Amazon.com.
Installing the new Motorola MB7621 was relatively straightforward. After disconnecting my previous modem, I reconnected the power, coaxial, and Ethernet cables to the new modem.
Comcast requires all cable modems to be registered. To do so, I visited https://www.motorola.com and was immediately redirected to Comcast's registration page. I logged into my Comcast account and registered the new Cable modem.
In terms of performance, I did not measure any significant improvement in download or upload speeds or access latency.
My speedtest.com showed the following results:
- Protocol: IPv4
- Download Speed: 63.5 Mbps
- Upload Speed: 3.7 Mbps
- Access Ping: 11ms
One significant improvement I noticed was how quickly the new Cable modem connected to Xfinity. It was much faster than the older SB6141.
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