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ASUS P4P8X motherboard user guide
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6. SMBus connector (6-1 pin SMB1)
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.
P4P8X
®
P4P8X SMBus Connector
SMB1
1
SMBCLK
Ground
SMBDATA
+3V
FLOATING
7. CPU and chassis fan connectors (3-pin CPU_FAN1, CHA_FAN1,
PWR_FAN1)
The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a
total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan
connectors on the motherboard, making sure that the black wire of each cable
matches the ground pin of the connector.
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!
P4P8X
®
P4P8X 12-Volt Fan Connectors
CPU_FAN1
CHA_FAN1
GND
Rotatio
n
+12V
PWR_FAN1
GND
Rotation
+12V
GND
Rotation
+12V