you might also want to play with the software app for the sound controller, as it also controls how the front panels act, make sure your FPAUDIO connector is on the correct pins, and select AC97 in bios for the audio controller...
MB : Rampage IV Extreme - BIOS 3602
CPU : i7 3930K C2 @ 4500 MHz offset -0,020V
RAM : G.SKILL RIPJAWS 64GB @ 2133 MHz F3-19200CL10Q2-64GBZ
Disks : Corsair Force GS SSD
GFX : ASUS GTX560Ti DirectCU II OC
PSU : Corsair AX1200i
Cooler\Case : Corsair H110, CM HAF932 Blue Edition
Keyboard\Mouse : Microsoft MX5500
DVD Burner : Samsung DVD-RWDL
OS : Win8 Pro 64