Asus K8N-LR User Manual page 43

4. CPU, Front and Rear fan connectors
(3-pin CPU_FAN1/2, FRONT_FAN1/2, Rear_FAN1/2)
The fan connectors support cooling fans of 350mA~2000mA (24
W max.) or a total of 1A~3.48A (41.76 W 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 inside the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
• All fan features the ASUS Smart Fan technology.
K8N-LR
R
K8N-LR Fan Connectors
5. Backplane SMBus connector (6-1 pin BPSMB1)
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.
K8N-LR
R
K8N-LR SMBus Connector
ASUS K8N-LR
CPU_FAN2
CPU_FAN2
CPU_FAN1
CPU_FAN1
FRNT_FAN2
Rotation
+12V
GND
FRNT_FAN1
FRNT_FAN1
REAR_FAN1
REAR_FAN1
REAR_FAN2
GND
+12V
Rotation
BPSMB1
1
GND
+12V
Rotation
FRNT_FAN2
Rotation
+12V
GND
REAR_FAN2
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