ASRock B75 Pro3 manual USB 3.0 Header Besides two default USB

(9-pin USB6_7)

(see p.13, No. 23)

USB 3.0 Header	Besides two default USB 3.0
(19-pin USB3_2_3)	ports on the I/O panel, there is
(see p.13, No. 8)	one USB 3.0 header on this
	motherboard. This USB 3.0
	header can support two USB 3.0
	ports.
Infrared Module Header	This header supports an
(5-pin IR1)	optional wireless transmitting
(see p.13, No. 27)	and receiving infrared module.
Consumer Infrared Module Header	This header can be used to
(4-pin CIR1)	connect the remote controller
(see p.13, No. 26)	receiver.
Front Panel Audio Header	This is an interface for front
(9-pin HD_AUDIO1)	panel audio cable that allows
(see p.13, No. 30)	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.

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