13
 
CPU_FAN1, SYS_FAN1: 
 (PWM)  DC  PWM  
12V DC 
 3 ( PWM) PWM 
 100% PWM  
DC  
 PWM  DC  BIOS > HARDWARE MONITOR 
 PWM  DC 
 
 PWM/ DC 
 CPU 
 PWM 
 DC  
1
CPU_FAN1
1
SYS_FAN1
PWM 
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
DC 
1 Ground 2 Voltage Control
3 Sense 4 NC