VIA Mainboard 845G Series Manual page 16

Hardware Installation
2.4.4. CPU Fan, Power Supply Fan and Chassis Fan Connectors
Connector: CN13 (FAN1)/CN17 (FAN2)/CN27 (FAN3)
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.
Top View of a Fan Connector
1 Ground
2 +12V DC
3 Fan Signal
2.4.5. ATX Power Supply Connectors
Connector: CN15-A/CN15-B/CN15-D
Type:
2x10/2x2/1x4
The mainboard comes with three onboard
power supply connectors labeled CN15-A,
CN15-B and CN15-D. CN15-A and CN15-B
are regular ATX power supply connectors.
The auxiliary power
(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. Plug in CN15-D as
long as you find out your power supply
without ATX12 (CN15-B)
Otherwise it is no necessary to use
CN15-D (AUX12V).
ATX12V Power Supply Connector
COM
COM
Pin 1 Pin 3
Page 16 The 845G MAINBOARD Series
Front View of a Fan Connector
Fan Signal
ATX Power Supply Connector
supply connector
connection.
Auxiliary Power Supply Connector
+12VDC
+12VDC
+12V DC
Ground
+5VDC
+12VDC
+5VSB +5VDC
PWR_OK -5VDC
COM COM
+5VDC COM
COM COM
+5VDC PS_ON#
COM COM
+3.3VDC -12VDC
+3.3VDC +3.3VDC
Pin 1 Pin 11
+5VDC Pin 4
COM Pin 3
COM Pin 2
+12VDC Pin 1