ASROCK IMB-185 User Manual page 16

CPU Fan Connector
(4-pin CPU_FAN1)
(see p.8 No. 9)
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.
Chassis Fan Connector
(4-pin CHA_FAN1)
(see p.8, No. 16)
ATX Power Input Connector
(24-pin ATXPWR1)
(see p.8 No. 3)
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.
COM4, 5, 6 Headers (RS232)
(9-pin COM4/COM5/COM6: see p.8, No. 8)
1
GND
2
+12V
3
CPU_FAN_SPEED
4
FAN_SPEED_CONTROL
CHA_FAN_SPEED
+12V
FAN_SPEED_CONTROL
GND
24
12
20-Pin ATX Power Supply Installation
1
2
16
Please connect the CPU fan
cable to the connector and
match the black wire to the
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
Please connect the fan cable
to the fan connector and
match the black wire to the
ground pin.
Please connect an ATX power
13
supply to this connector.
1
24
12
PIN Signal Name PIN
1 DCD 6
2 RXD 7
3 TXD 8
4 DTR 9
5 GND 10
13
1
Signal Name
DSR
RTS
CTS
No Power/+5V/+12V
NC