The USB 3.0 Etron controllers can be disabled in BIOS.You have there 2 usually available , the F_ one - front and R_ rear.
Having in mind the issues ,similar to what i randomly had with my 970A-UD3 i would say they will never work as they should ,so disabling them might be a solution.
Why is this happening is beyond logic and in my case drivers or BIOS-es never solve anything.
Those controllers just stopped working randomly.
If you want USB 3.0 to work properly on Gigabyte AMD boards get FM2/+ boards ,no Etron chips in there.
