ASRock B75M-GL R2.0 USB 2.0 Headers Besides four default USB, Two USB 2.0 headers on this, Ports

USB 2.0 Headers							Besides four default USB 2.0
(9-pin USB6_7)							ports on the I/O panel, there are
(see p.2, No. 19)							two USB 2.0 headers on this
							motherboard. Each USB 2.0
							header can support two USB 2.0
							ports.
		USB_PWR
(9-pin USB8_9)			P-9
				P+9
					GND
(see p.2, No. 20)	1					DUMMY
					GND
				P+8
			P-8
		USB_PWR

USB 3.0 Header

IntA_P0_D+

(19-pin USB3_2_3)

IntA_P0_D-

GND

IntA_P0_SSTX+

(see p.2, No. 9)

IntA_P0_SSTX-

GND

IntA_P0_SSRX+

IntA_P0_SSRX-

Vbus

1

Vbus

IntA_P1_SSRX-

IntA_P1_SSRX+

GND

IntA_P1_SSTX-

IntA_P1_SSTX+

GND

IntA_P1_D-

IntA_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		IRTX								This header supports an
(5-pin IR1)			+5VSB							optional wireless transmitting
					DUMMY
(see p.2, No. 22)	1									and receiving infrared module.
				GND
		IRRX
Consumer Infrared Module Header										This header can be used to
(4-pin CIR1)	1								GND	connect the remote controller
(see p.2, No. 21)								IRTX		receiver.
						ATX+5VSB
							IRRX

Front Panel Audio Header		GND
(9-pin HD_AUDIO1)			PRESENCE#
				MIC_RET
(see p.2, No. 30)						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.

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ASRock B75M-GL R2.0 Motherboard