3/4) CPU_FAN/SYS_FAN (Fan Headers)
All fan headers on this motherboard are 4-pin. Most fan headers possess a foolproof insertion design.
When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is
the ground wire). The speed control function requires the use of a fan with fan speed control design. For
optimum heat dissipation, it is recommended that a system fan be installed inside the chassis.
•
Be sure to connect fan cables to the fan headers to prevent your CPU and system from
overheating. Overheating may result in damage to the CPU or the system may hang.
•
These fan headers are not configuration jumper blocks. Do not place a jumper cap on the headers.
Pin No.
Definition
1
GND
2
Voltage Speed Control
3
Sense
4
PWM Speed Control
CPU_FAN/SYS_FAN
DEBUG
PORT
G.QBOFM
1
1) ATX_12V (2x2 12V Power Connector)
This connector can be used to input power when the DC power jack on the rear panel is not connected.
However, if the DC power jack is connected, this connector can only be used to output power.
When used to input power:
Pin No.
Definition
1
GND
2
GND
3
+12V
4
+12V
4
3
2
1
When used to output power:
Pin No.
Definition
1
GND
2
GND
3
DC_OUT
4
DC_OUT
NOTE: The two connectors cannot be used simultaneously as a source of power input.
2) AT_ATX (ATX Power Switch Jumper)
This jumper allows you to select AT or ATX power mode.
1
1
1-2 Close: AT mode.
2-3 Close: ATX mode. (Default)
or
HDD LE
D
RESET
SW
HDD LE
D
RESET
SW
with
HDD LE
D
RESET
SW
HDD LE
D
RESET
SW
a
r
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