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lucasj1
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Wednesday, July 9th, 2025

Ubiquiti UCI pegged at 940 Mbps Down when paying for Gigabit 2x

Currently experiencing our Ubiquiti UCI pegging around 940 Mbps down after several restarts and attempts at different times of the day. We're currently paying for the Gigabit 2x and want to ensure speeds delivered to the modem are as expected. I know that the device is supported for Next Gen Speed Tier per the documentation listed here - Full List of Supported Devices.

Below (excuse the formatting nightmare) is the last speed test run against the cable modem from the Comcast.

Last Speed Test
Jul 9, 2025, 12:04 PM
Download
940 Mbps
Upload
347 Mbps
Latency
13 ms

Let me know what I need to do to get this resolved please.

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19 days ago

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XfinityJon

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383 Messages

19 days ago

Hey there lucasj1. Are you connected by cable or wirelessly when running the speed test?

 

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lucasj1

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Running it directly from the Modem to the ISP, but it seems to be resolved now. I didn't update or replace anything, but the modem had an update that I had not applied and worked after that.

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19 days ago

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XfinityJon

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383 Messages

Awesome, I am glad to hear it is working now. Did you have anything else I could assist you with?

I am an Official Xfinity Employee.
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19 days ago

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lucasj1

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Nope! Thread can be closed/answered. Thanks.

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19 days ago

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XfinityLinda

Official Employee

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2K Messages

@lucasj1 Awesome! Thanks for sharing.

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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19 days ago

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EG

Expert

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112.1K Messages

19 days ago

Is there a router in the mix here ? If hardwired, are you using at least a Cat6 or greater cable ? Does your NIC's Ethernet port support 2 gig or greater ?

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lucasj1

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The topology would be from ISP -> modem -> gateway. It wouldn't have been a component in this issue. Cat6 was used, yeah.

The modem does have multi-gig NIC, yep. It ended up being a software update to the modem I didn't realize was there.

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19 days ago

EG

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112.1K Messages

19 days ago

Thanks for the update ! Glad you got it figured out !

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