Hello, I have been losing 10-20 mb's download speed on my Archer c-4000. I have reset it many times for it to only go back and lose 10-20 mb's download speed again. I have tried a different ethernet cord still same results. If I hook directly to modem, I have full speed at 55 mb's download and 5 upload. It says I am up to date on firmware version. I have tried reading through other problems on here for fixes but my menu is different than what I find.
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Archer c-4000 Losing 10-20 download speed from modem to router
Model: Archer C4000
Hardware Version: V2
Firmware Version: 1.1.1 Build 20190827 rel.78773(5553)