Motherboard's rear USB 3.0 ports not working

Hello, My new motherboard's USB 3.0 ports do not work. Its a new FM2 socket motherboard: ASRock FM2A75M-DGS I'm ok with computers, but... In my 'Device Manager' (see attachment under "other devices") it says there is no drivers installed. I cant find any 3.0 drivers at ASRock's website ASRock > FM2A75M-DGS (http://www.asrock.com/mb/AMD/FM2A75M-DGS/?cat=Download&os=Win764)