Is it a gigabyte board, My p67-ud4-b3 has the same feature but it is only on select ports. I had to set it up in the bios if i recall correctly.
Did you happen to upgrade or clear the BIOS by chance? If you did you would have to go into the BIOS and set it up again.
My board has 3 usb2 in the front 8 usb2 +2 usb3 in the IO cluster then i have a PCI bracket that mounts vertically with 2 more usb2 for a grand total of 13 usb 2 ports and 2 usb 3 ports. I have them all filled up but the 2 usb3 ports and the pci slot usb2 ports. I use 7 just for charging ...4 go to my 3d glasses for my tv 2 are micro usb and the other 2 are super micro:) One for charging my jaybyrd 2 bluetooth sports headphones "that work fantastic for my IOS devices" The the 2 IOS charging cables one Ipad 2/iphone 4s and iphone 5's new cable.
I have no USB 3 devices...But i do want a fast 64GB USB3 flash drive bad:)
2600k@4915mhz CM Nepton40XL 16gb Cas9 1600mem 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost core and 1995mhz mem SBlaster Z powered by TX-850 PSU 2xHTPC's Both w/i3 2120's,1xasus LP HD6570@850core 1000 ddr3mem 1xHIS hd7750@1125core1400mem