ASRock B75M R2.0 - Manual (Page 31)

31
ASRock B75M R2.0 Motherboard
English
Chassis and Power Fan Connectors Please connect the fan cables
(4-pin CHA_FAN1) to the fan connectors and match
(see p.2, No. 10) the black wire to the ground pin.
CHA_FAN1 supports Fan
(3-pin PWR_FAN1) Control.
(see p.2, No. 1)
ATX Power Connector Please connect an ATX power
(24-pin ATXPWR1) supply to this connector.
(see p.2, No. 6)
20-Pin ATX Power Supply Installation
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
To use the 20-pin ATX power supply, please plug your
power supply along with Pin 1 and Pin 13.
12
1
24
13
12
1
24
13
The front panel design may differ by chassis. A front panel module mainly
consists of power switch, reset switch, power LED, hard drive activity LED,
speaker and etc. When connecting your chassis front panel module to this
header, make sure the wire assignments and the pin assign-ments are
matched correctly.
Chassis Speaker Header Please connect the chassis
(4-pin SPEAKER 1) speaker to this header.
(see p.2, No. 17) +5V DUMMY
DUMMY
SPEAKER
1
GND
+12V
PWR_FAN_SPEED
GND
+12V
CHA_FAN_SPEED
FAN_SPEED_CONTROL
CPU Fan Connectors Please connect the CPU fan
(4-pin CPU_FAN1) cable to the connector and
(see p.2, No. 4) 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
GND
+12V
CPU_FAN_SPEED
FAN_SPEED_CONTROL
1 2 3 4