The P4X4-ALH Mainboard
Page 16
2.5.4. CPU Fan and Chassis Fan Connectors
Connector:
CN13 (FAN1)/CN
17
(FAN2)
Type:
3 pin
The cooling fans must be connected to their respective power connectors. If
you have installed the hardware-monitoring feature you will be able to monitor
the rotating speed of the CPU cooling fan in your Windows operating system.
Hardware Installation
ATX Connectors Pin Assignments
CN15-A
CN15-B
Pin 1
+3.3VDC
Pin 11
+3.3VDC
Pin 1
COM
Pin 2
+3.3VDC
Pin 12
-12VDC
Pin 2
COM
Pin 3
COM
Pin 13
COM
Pin 3
+12VDC
Pin 4
+5VDC
Pin 14
PS_ON#
Pin 4
+12VDC
Pin 5
COM
Pin 15
COM
CN15-D
Pin 6
+5VDC
Pin 16
COM
Pin 1
+12VDC
Pin 7
COM
Pin 17
COM
Pin 2
COM
Pin 8
PWR_OK
Pin 18
-5VDC
Pin 3
COM
Pin 9
+5VSB
Pin 19
+5VDC
Pin 4
+5VDC
Pin 10
+12VDC
Pin 20
+5VDC
Fan Signal
+12V DC
Ground
1 Ground
2 +12V DC
3 Fan Signal
Top View of a Fan Connector
Front View of a Fan Connector
2.5.5. ATX Power Supply Connectors
Connector:
CN15-A/CN15-B/CN15-D
Type:
20 pin block/2x2 12V/1x4 AUX12V
The mainboard comes with three onboard power supply connectors labeled
CN15-A, CN15-B and CN-15D. CN15-A and CN15-B are regular ATX12V power
supply connectors. CN15A and CN15D are regular ATX power supply connec-
tors. The auxiliary power supply connector (CN15-D) is for a +12V and +5V
power supply. These increased power supplies are necessary to provide extra
power for the slot. The ATX 12V power supplies are all downward compatible
with standard ATX power supplies.
