I have an ASRock X79 board where the rear bank of 4x USB3.0 ports have suddenly stopped working. I think this must be a software or resource conflict issue, but I just can't figure it out.
A quick primer. X79 did not have native USB3.0. I believe all USB3.0 ports are controlled by an ASmedia chip. I currently have 6x USB3.0 ports: 4 on the rear I/0 panel and 2 front from a header. None of the 4 rear ports work. The front 2 work fine. I've tried upgrading the ASmedia driver from Intel, and from ASmedia, as well as the most recent one from Microsoft for Win 10. To no avail.
The strange thing is that the front ports work fine, given all 6 should be controlled by the same controller.
Further, this happened a couple of years ago when I was on Win 7 and I was somehow able to get the rear ports working again. However, a while after, they stopped working. Then when I upgraded to Win 10, they worked for a while. Then suddenly a couple of months ago, dead.
I've seen reports of this issue with Asus X79 boards as well... I'll probably just get a PCIe USB3.0 card eventually.
I realize that the Sandy-E platform is over 5 years and counting by this point. But I was wondering if any savvy gerbils may have come across something similar and found a solution.