ASRock B75M-DGS Quick Installation Guide - Page 22
Front Panel Audio Header
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(9-pin USB6_7) (see p.2, No. 17) USB 3.0 Header (19-pin USB3_2_3) (see p.2, No. 6) IntA_P0_D+ IntA_P0_DGND IntA_P0_SSTX+ IntA_P0_SSTXGND IntA_P0_SSRX+ IntA_P0_SSRXVbus 1 Vbus IntA_P1_SSRXIntA_P1_SSRX+ GND IntA_P1_SSTXIntA_P1_SSTX+ GND IntA_P1_DIntA_P1_D+ DUMMY Besides two default USB 3.0 ports on the I/O panel, there is one USB 3.0 header on this motherboard. This USB 3.0 header can support two USB 3.0 ports. Infrared Module Header (5-pin IR1) (see p.2, No. 23) IRTX +5VSB DUMMY 1 GND IRRX This header supports an optional wireless transmitting and receiving infrared module. Front Panel Audio Header (9-pin HD_AUDIO1) (see p.2, No. 21) GND PRESENCE# MIC_RET OUT_RET 1 OUT2_L J_SENSE OUT2_R MIC2_R MIC2_L This is an interface for front panel audio cable that allows convenient connection and control of audio devices. 1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instruction in our manual and chassis manual to install your system. 2. If you use AC'97 audio panel, please install it to the front panel audio header as below: A. Connect Mic_IN (MIC) to MIC2_L. B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L. C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for HD audio panel only. You don't need to connect them for AC'97 audio panel. 22 ASRock B75M-DGS Motherboard English