ASRock 880GXH/USB3 User Manual - Page 26

D. MIC_RET and OUT_RET are for HD audio panel only. You don't need to connect them for AC'97 audio panel. E. To activate the front mic. For Windows® XP / XP 64-bit OS: Select "Mixer". Select "Recorder". Then click "FrontMic". For Windows® 7 / 7 64-bit / VistaTM / VistaTM 64-bit OS: Go to the "FrontMic" Tab in the Realtek Control panel. Adjust "Recording Volume". System Panel Header (9-pin PANEL1) (see p.11 No. 14) PLED+ PLEDPWRBTN# GND 1 DUMMY RESET# GND HDLEDHDLED+ This header accommodates several system front panel functions. Power LED Header (3-pin PLED1) (see p.11 No. 22) 1 PLEDPLED+ PLED+ Please connect the chassis power LED to this header to indicate system power status. The LED is on when the system is operating. The LED keeps blinking in S1 state. The LED is off in S3/S4 state or S5 state (power off). Chassis Speaker Header (4-pin SPEAKER 1) (see p.11 No. 17) 1 SPEAKER DUMMY DUMMY +5V Please connect the chassis speaker to this header. Chassis, Power and NB Fan Connectors (4-pin CHA_FAN1) (see p.11 No. 16) GND +12V CHA_FAN_SPEED FAN_SPEED_CONTROL (3-pin CHA_FAN2) (see p.11 No. 15) GND +12V CHA_FAN_SPEED Please connect the fan cables to the fan connectors and match the black wire to the (3-pin PWR_FAN1) (see p.11 No. 39) PWR_FAN_SPEED +12V GND (3-pin NB_FAN1) (see p.11 No. 9) GND +12V NB_FAN_SPEED 26