Asus P4SE/U2 - Manual (Page 27)

ASUS P4SE Motherboard 1-17
6. CPU, Chassis, and Power Fan Connectors
(3-pin CPUFAN1, CHASFAN1, PWRFAN1)
The three fan connectors support cooling fans of 350mA (4.2 Watts)
or a total of 1A (12W) at +12V. Orient the fans so that the heat sink
fins allow air flow to go across the onboard heat sinks instead of the
expansion slots. The fan wiring and plug may vary depending on the
fan manufacturer. Connect the fan cable to the connector matching
the black wire to the ground pin.
Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
P4SE
®
P4SE 12-Volt Fan Connectors
CPUFAN1
PWRFAN1
CHASFAN1
GND
Rotation
+12V
GND Rotation +12V
GND
Rotation
+12V
7. SMBus connector (6-1 pin SMB)
This connector allows you to connect SMBus (System Management
Bus) devices. Devices communicate with an SMBus host and/or other
SMBus devices using the SMBus interface. SMBus is a specific
implementation of an I
2 C bus, a multi-device bus that allows multiple
chips to connect to the same bus and enable each one to act as a
master by initiating data transfer.
P4SE
®
P4SE SMBus Connector
SMB
1
SMBCLK
Ground
SMBDA
T
A
+3V
FLOA
TING