Asrock a790gmh 128m User Manual

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CPU Fan Connector

Please connect the CPU fan

(4-pin CPU_FAN1)

cable to this connector and

(see p.12 No. 3)

match the black wire to the

ground pin.

Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin

CPU fan still can work successfully even without the fan speed control function.

If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this

motherboard, please connect it to Pin 1-3.

3-Pin Fan Installation

Pin 1-3 Connected

+5V

DUMMY

SPEAKER

GND

PWRBTN#

PLED-

PLED+

DUMMY

RESET#

GND

HDLED+

HDLED-

System Panel Header

This header accommodates

(9-pin PANEL1)

several system front panel

(see p.12 No. 18)

functions.

Chassis Speaker Header

Please connect the chassis

(4-pin SPEAKER 1)

speaker to this header.

(see p.12 No. 19)

4
3
2
1

GND

+12V

CPU_FAN_SPEED

FAN_SPEED_CONTROL

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.

E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select

Chipset Configuration. Set the Front Panel Control option from

[Auto] to [Enabled].

Chassis and Power Fan Connectors

Please connect the fan cables

(3-pin CHA_FAN1)

to the fan connectors and

(see p.12 No. 13)

match the black wire to the

ground pin.

(3-pin PWR_FAN1)

(see p.12 No. 34)

GND

+12V

CHA_FAN_SPEED

GND

+12V

PWR_FAN_SPEED