Those of us with dx79si boards waited a year for a solution and got squat from intel. After 2 weeks of testing and scouring these boards I determined all my USB30 problems and hibernate/resume problems were due to the lousy usb3.0 chip and drivers Intel uses. Renesas for me.....worthless garbage.
Go on Amazon for $31 and get an Inateck pcie add in card with 5 rear ports and a plug for the front ones. For $31 dollars that I know (rant on) YOU SHOULD NOT HAVE TO SPEND AFTER SPENDING HUNDREDS ON A MOTHERBOARD (rant off) and 10 minutes time all your troubles will be solved. My machine boots faster, hibernates and resumes and my USB3.0 portable drives stay connected always.
Cheers.