I've a network card (RTL8812BU) which has an USB 3 interface and it's connected to an USB3 port, still I get the warning about:

"This device can perform faster when connected to USB 3" in the "Bluetooth and other devices".

I can confirm that it's connected to an USB 3 port even by the fact that the USB Viewer shows it's directly connected to the USB 3.0 HUB (Asus Z97-K mainboard). This happens systematically on any of the 6 (4 rear + 2 front) USB3 ports.

I want to troubleshoot this but I don't understand where I could get any logs telling me why I'm getting this error.

My question is: where do I find logs explaining exactly what went wrong/why is this warning happening? Any windows registry, event viewer, log files etc... where to look for?

  • Try to Update your USB drivers
    – Wasif
    Jun 19, 2020 at 16:54
  • Already did and they are the latest: however here the question is about where to find error/log diagnostics to tell me why this is happening! Jun 19, 2020 at 19:01
  • Interference between 2.4 GHz radio and 2.5 GHz USB3.0 fundamental frequency is a fairly common thing. I am afraid there is no solution for this particular product. Jun 20, 2020 at 2:01
  • thanks @Ale..chenski but this is not the case: the card has been forced to link only at 5Ghz frequence, so the 2.4 is not being used Jun 20, 2020 at 14:25
  • You can't avoid emissions in 2.5GHz range by forcing something or not forcing. You are getting this error because the USB link failed its built-in bitrate quality test and dropped to USB2 mode. But if you want to find out "what exactly went wrong" you need to deploy Win10 trace log tools, google for [how to capture event trace log (ETL)]. Good luck. And the answer will still be, the port status gets downgraded into HS mode. That's all the system can know. Jun 20, 2020 at 17:31


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