I use the driver buildin in Windows 8, as I can't find any new driver for Intels USB 3.0 eXtensible Host Controller -0100. The driver for this from Windows 7 won't install. Have you found another Intel-driver for USB 3?
Hehe I tried the new setting under "Windows 8" in the BIOS, MSI fastboot. That made the POST go very fast, too fast in fact as I could not get into BIOS nor use F11 as bootselector. My keyboard was not active fast enough . I had to install clickBIOS II and load default setting to get control back of POST . When I'm finish with testing, I will use this very fast POST again.