14
I/O
CPU_FAN1SYS_FAN1~2: 
    PWM () DCPWM
12V        
 DC
               3 (Non-PWM) PWM   
100%
         PWM/DC 
PWM
1 Ground 2 +12V
3 Sense 4
Speed Control 
Signal
DC
1 Ground 2
Voltage 
Control
3 Sense 4 NC
PWM 
DC 
   
BIOS > HARDWARE MONITORPWMDC
PWM/DC 
 
PWM/ DC
        CPU
 
1
CPU_FAN1
1
SYS_FAN1/ SYS_FAN2