@redsector73 in my case, I'm on latest bits 3702 and latest chipset drivers
As of this writing my USB keeps on disconnecting and reconnecting, device manager just flashing not really telling me which specific USB, reconnected to different ports, used USB log view not showing anything. Tried all the BIOS and same thing, this is crazy. Did the GEN4 to GEN3 config and still the same.
did you try to force your pciex to 3.0 for your graphic card?
I'm stuck with my old RX480 becouse of crazy street prices... so maybe that's a pciex 4.0 problem.