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2.3 Connect Cooling Fans
These fan headers support cooling-fans built in the computer. The fan cable and connector
may be different according to the fan manufacturer.
CPU_FAN1: CPU Fan Header
SYS_FAN1: System Fan Header
SYS_FAN2/ 3: System Fan Header
Note
» CPU_FAN1, SYS_FAN1/ 2/ 3 support 4-pin and 3-pin head connectors. When connecting with wires
onto connectors, please note that the red wire is the positive and should be connected to pin#2, and
the black wire is Ground and should be connected to pin#1(GND).
10 | Chapter 2: Hardware installation
PWM Mode
DC Mode
Pin Assignment
Pin Assignment
1
Ground
1
2
+12V
2
3
Sense
3
4
Speed Control Signal 4
PWM Mode
DC Mode
Pin Assignment
Pin Assignment
1
Ground
1
2
+12V
2
3
Sense
3
4
Speed Control Signal 4
Pin Assignment
1
Ground
2
+12V
3
FAN RPM rate sense
4
Smart Fan Control (By Fan)
Ground
Voltage Control
Sense
NC
Ground
Voltage Control
Sense
NC
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