Mr_Angry's profile

New Poster


1 Message

Sat, May 9, 2020 4:00 PM

Internet speed usage highly varies from day to day

I live in a mixed commercial/residential building in downtown Bellevue, and our entire unit has gigabit internet standard. My home setup is as follows:


  • Xfinity cable modem, model CGM4140COM
  • Linksys WRT 3200ACM Wi-Fi router, with both 5 GHz and 2.4 GHz channels enabled
  • All wired connections are done via Cat 5e cable or higher (most of it is now Cat 7)

Last week we had an Xfinity technician out to address poor speeds in our home. From a Windows 10 computer, wired in via Cat 7 cable, and a gigabit ethernet adapter, I was getting no more than 30 Mbps down, and 41 Mbps up transfer speeds. Upon visiting our home the technician, who was very good, did the following:


  1. Removed the four way cable splitter with our unit, replaced it with just a two-way splitter (I had 75 Ohm terminator caps on the unused outlets, but still, I get a four-way splitter would increase signal degradation)
  2. Rewired two outlets where FM interference was the highest

Upon completion I was now seeing transfer speeds of 930 Mbps down, and still 41 Mbps up (the latter is expected), and all was good.


Throughout the week I've been monitoring speed, and it seems to vary wildly from day to day. Most weekday mornings I seem to be back down to 30 Mbps down transfer speed, and then that evening or next day afternoon I'm back to 900 Mbps transfer speed. Sometimes I reset my cable modem and router and get an immediate improvement, other times I do not, and the problem corrects itself the next day.


My question is, is Xfinity throttling speeds at peak periods given everyone is work from home? I've already had a technician out, and as the speed varies I do not believe it is on our end anymore. Why would I see such a wide variation in transfer speeds?



Regular Visitor


15 Messages

1 y ago

I'm having the same issues, pretty sure they've oversold their network and everybody is getting lag/throttled. They don't seem to care.

New Poster


1 Message

8 m ago

I'm having the same issue from Nashville, TN. Doesn't seem to matter what time of day. Sometimes it's over 250Mbps wired and 120Mbps wifi. Others, it's only 6Mbps wifi. We've done a reset on our gateway, installed wifi analyzers, systematically disconnected devices that might have been interfering/using bandwidth. It isn't on our end. I dread calling customer support because it always takes hours and they always make us redo all the troubleshooting we've already done 20 times already. It really shouldn't be this hard. 😞

New to the Community?

Start Here