Asus K8N-LR - Manual (Page 43)

ASUS K8N-LR 2-23
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.
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
CPU_FAN2
CPU_FAN2
CPU_FAN1
FRNT_FAN2
REAR_FAN1
REAR_FAN2
K8N-LR Fan Connectors
FRNT_FAN1
GN
D
Rotatio
n
+12V
CPU_FAN1
GND
Rotation
+12V
FRNT_FAN2
GND
Rotation
+12V
GND
Rotation
+12V
FRNT_FAN1
REAR_FAN1
GND
Rotation
+12V
GN
D
Rotatio
n
+12V
REAR_FAN2
K8N-LR R
K8N-LR SMBus Connector
BPSMB1
1
I2C_CLK
#
GN
D
I2C_D
AT
A#
+5VSB
FA
N_PW
M