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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_FAN: CPU Fan Header
PWM Mode
Pin
Assignment
1
Ground
2
+12V
3
Sense
4
Speed Control Signal
CPU_OPT: CPU Fan Header
PWM Mode
DC Mode
Pin
Assignment
Pin
Assignment
1
Ground
1
Ground
2
+12V
2
Voltage Control
3
Sense
3
Sense
4
Speed Control Signal
4
NC
SYS_FAN1: System Fan Header
PWM Mode
Pin
Assignment
1
Ground
2
+12V
3
Sense
4
Speed Control Signal
Note
»
» CPU_FAN, CPU_OPT, SYS_FAN1 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).
»
» CPU Fan Header (CPU_OPT): Support water cooling fan and CPU fan.
12 | Chapter 2: Hardware installation