This driver, intel_chipset_9.4.4.1006 contained usb fixes and is working for me with Win 7.
It may be newer than the one you are using.
http://www.mediafire.com/?6166q1d1mdy9beiAlso, Your board has 2 USB3 motherboard headers. USB3.0 1 (colored red) and USB3.0 2
One of those headers supplies the only USB3 that comes directly from the Intel Chipset. The other header feed comes through a Renesas hub.
On my UDH5 the USB3.0 2 is the direct feed from the Intel chipset. Yours is probably the same (try both to be sure). It is possible the direct feed could solve the problem if the above driver doesn't do it.
All of your rear panel USB3 ports come from the Renesas Hub. The 2 ports next to the PS/2 connector are USB 2.0
Since you have 3 different sources of USB you might as well try them all to see if there is any difference before pulling the motherboard.