The CM1000 Ultra-High Speed Cable Modem, with speeds up to 1Gbps and DOCSIS 3.1 is 10X faster than DOCSIS 3.0 devices. It's backward compatible with DOCSIS 3.0 and ready for future service plan upgrades for XFINITY from Comcast, Cox, and Spectrum. A Gigabit Ethernet port provides faster access and downloads.
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For the first 5 days the CM1000 was great. Installation was completely done on line with no call to Xfinity needed. Have Comcast/Xfinity 200 and was getting 237 down with ping ranging from 10 to 13 with this modem. On the 6th day modem lost connection, do to sync issues with Comcast. The only way to reconnect was to power down and restart the CM1000 modem. This has happened once a day for the past 3 days. Returned unit to Best Buy, before the15 day return limit expired and bought the SB6190. I will wait for a year or so for the 3.1 problems to be worked out.