NETGEAR Gigabit Cable Modem (32×8) DOCSIS 3.1 | for XFINITY by Comcast, Cox. Compatible with Gig-Speed from Xfinity – CM1000-1AZNAS (Renewed)
February 22, 2020 - Comment
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
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$124.99Amazon.com Price
(as of April 19, 2020 9:01 am GMT+0000 - Details) + Add To Wish List
(as of April 19, 2020 9:01 am GMT+0000 - Details) + Add To Wish List
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Faulty firmware or hardware limits this modem to 500Mpbs down/41Mbps up on 1Gig Xfinity internet Purchased this modem after upgrading my internet service through Xfinity to 1 gigabit internet which is rated to provide at the top end about 970 Mbps down. From the first bootup of the modem, I only received about 300Mbps down and about 30Mbps up. The highest I ever managed to get was 477.97Mbps down and 41.77Mbps up as recorded on July 4th at 1:44AM CST when traffic on the shared internet connection was lowest.I eventually managed to confirm that this is a known issue via the numerous Netgear forum support posts about slow internet on this modem model specifically (Affects all Netgear CM1000 series modems). There is currently no documented solution. I even tried manually changing the starting scan frequency in the modem settings, but this did not change the speeds being recorded.
So far so good No issues, brings me the advertised speed 🙂 Comcast couldn’t find my modem when adding (the serial # and/or MAC) it to my account to eventually send a restart signal from app or browser. But so far so good!
Extreme lag spikes. Extremely high ping latency every 30 seconds or so. My original set up was Motorola SB6141modem with Asus RT AC68R. I switched to this modem with eero router. While the signal is strong, the extremely high lag spikes makes it unusuable. I’m getting a new copy tomorrow so let’s see if this was was defective.Edit: I got a new copy and changed configuration on my router eero. It works fine. No more lag.