Okay, if you plugged in the HD Audio connectors, you have to adjust the settings in the BIOS and change it to HD Audio. Some BIOS comes at HD Audio at default or AC97. Just depends on the BIOS. But mine, I have the AC97 plugged in and the BIOS its HD Audio and the front panels are working even though my the BIOS settings is at HD Audio and I used the AC97 connector.
Everytime you change these settings in the BIOS, you have to re-install the sound drivers that came with your mobo.
Everytime you change these settings in the BIOS, you have to re-install the sound drivers that came with your mobo.