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Forum Discussion
CM400 not reaching it's specified max speed (not even close)!
I have a CM400 modem, which has a specified max speed limit of 340Mbps and today my ISP (Xfinity) upgraded my plan to 600Mbps down, 20Mbps up, but I was surprised to see that the max download speed I...
Xfinity only rates the CM400 for 287mbps. And thats with perfect conditions running.
the up to rating that you see for most modems is the absolute max you can run with that unit depending on how the ISP provisions the device. Xfinity doesn't provision it for that so it won't get more than what you're getting. If you want faster speeds, you'll need a faster modem.