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Upgraded to 1gig internet, purchased new modem, no increase in speed
I just upgraded my plan from 300mb to 1gb 5 days ago. In turn, I had to upgrade my modem from an Arris SB6183 to an SB8200v3, so it would be DOCSIS 3.1 compliant.
the new modem works, but there has been no increase in speed on my asking. A tech already came out once and verified the cable is good and the modem is working, but speed is still only showing ~325 down. This is regardless of whether I use my wireless or gigabit Ethernet connected devices.
any help would be appreciated, because my last chat with support said I needed to upgrade to “advanced security”
BruceW
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26.8K Messages
2 months ago
The SB8200v3 is not compatible with Gigabit internet service. Comcast/Xfinity rates it for wired download speeds "Up to 934 Mbps". Follow the "See all modems" link near the bottom of https://www.xfinity.com/support/internet/customerowned and then under the "Compatible Modems" heading click the Arris list. Using devices on Internet speed tiers for which they are not approved tends to produce unexpected results, often speeds well below the ones you are paying for.
AFAIK Comcast/Xfinity has never said how they provision devices operating on speed tiers they're not approved for. All I can tell you is that many customers who tried it have reported that they don't get full speed. There's a tendency to think the device will operate at the maximum speed it is capable of, but that doesn't seem to be the case.
You need to either get a device compatible with Gigabit, or drop back to a plan speed for which the 8200 is compatible.
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