New
#11
If you haven't already done so, give these drivers a try: AMD USB3.1 eXtensible Host Controller Crimson ReLive Edition 16.12.1 driver download for Windows 7 64bit, 8.1 64bit, 10 64bit - driverserve. If those don't work try the Catalyst 13, 14, 15 and 16 drivers on Gpus-Chipsets-Cpus. With the latter, start with version 16 and work your way backwards. Given how new your mobo is, 16 is probably right for you.
HTH,
--Ed--