Well, you are using Windows 7 64 bit, I am using Windows 7 32 bit, the Etron drivers for these are two different worlds, they behave differently.
I have reduced the multiplier for my graphic card from x16 to x8 and it seems the rear ports now at least recognize what I am plugging in. With the graphic card running at x16, the rear ports don't recognize anything. I have also powered from another cable the graphic card.
I have added to my system a PCI-E card with two USB 3.0 ports, with the NEC/RENESAS PD720200 controller. Man, it just works! No issues, no beta drivers, no BSOD, no lag, no disconnections, no ignored support requests.
Etron could not fix the issues in 9 months time, I can't wait more.
I have already ordered a new Asus mainboard. Maybe I will keep the Asrock mainboard as a backup or sell it.
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