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Question

Sb8200 only getting 100mbps on a 1gbps plan


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had a zfinity technician rule out the splitter, coax cable, and ethernet cable a possible cause, down to being the modem itself causing the problem. what could be the reason for this failure. also i am hard wired to it (no router in between). could it be a hardware failure on the inside of the pcb board? if so which component that i may de sauder and re sauder.

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5 replies

plemans
Juggernaut
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  • Juggernaut
  • 2275 replies
  • January 28, 2024

log into the computer you have connected and see if your actually connected at a gigabit rate. I’ve seen sketchy cables, ports, pc’s that only connect at 10/100mbps and limit speeds. 


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  • Author
  • The Many
  • 6 replies
  • January 29, 2024

i tried a few different ethernet cables all give the same results including tried it with wifi as well as one of the efforts


plemans
Juggernaut
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  • Juggernaut
  • 2275 replies
  • January 29, 2024

When you check the pc that is direct connected, is it connecting at gigabit speeds? Thats what we need to know. If its only connecting at 10/100mpbs then its pointless to troubleshoot xfinity’s line. But if its connecting at gigabit, its a different story


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  • Author
  • The Many
  • 6 replies
  • January 29, 2024

By check do you mean , check the download speeds on a site like speedtest.net? or is there another way to check


plemans
Juggernaut
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  • Juggernaut
  • 2275 replies
  • January 29, 2024

If you’re on windows its usually under your windows network settings for the hardwired device. 

settings-->network & ethernet-->Ethernet--->scroll down to link speed


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