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user_ftxozk
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Thursday, March 12th, 2026 3:32 AM

Modem loses speed from 500 megabits per second down to 92 megabits per second

Almost every day now, when I get home from work, I test my modem speed. It's at 92 megabits per second. I unplug it and plug it back in, and it's at 500 megabits per second. I go do some work in my workshop, come back in the house, check the modem, and it's at 92 megabits per second. Is the modem being throttled, or does the modem have a problem and needs to be replaced? Thanks.

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4 hours ago

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XfinityShawn

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5 hours ago

 

user_ftxozk Xfinity doesn't throttle any customers service, and my team can help you troubleshoot/send a technician if needed. Is this happening at random times of the day by any chance? Also, about how far are your devices from the modem? 

 

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user_ftxozk

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I am hardwired to the computer. I can turn my chair around and look at the modem, and this happens throughout the day. It will be 500 MB for a while, and then all of a sudden it's 92 megabits. I just unplugged it and replugged it. The download speed is now 435 megabits per second, and the upload speed is 587.

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5 hours ago

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XfinityShawn

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2.3K Messages

 

user_ftxozk My team can run some more checks on our end to assist you on this. To send a direct message, please click on the chat icon in the top-right corner of the screen, and select "Xfinity Support" to initiate a Direct Message. 
Click "Sign In" if necessary
Click the "direct messaging" icon or https://forums.xfinity.com/direct-messaging
Click the "New message" (pencil and paper) icon
Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line
Type your message in the text area near the bottom of the window
Press Enter to send it

 

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4 hours ago

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user_ftxozk

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I have an idea: I'm going to buy a wireless network adapter tomorrow while I'm at work and use it to check my internet speed. If it does the exact same thing, then I will know I might have an issue. If it does not, I know it is my network card built into my computer that is the problem. I will let you guys know what happens.

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4 hours ago

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XfinityShawn

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user_ftxozk Sounds like a plan, and my team will be here awaiting the results. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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4 hours ago

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