12
Fan connectors can be classified as PWM (Pulse Width Modulation) Mode and
Voltage Mode. PWM Mode fan connectors provide constant 12V output and adjust fan
speed with speed control signal. Voltage Mode fan connectors control fan speed by
changing voltage. Therefore, when you plug a 3-pin (Non-PWM) fan to a PWM Mode
fan connector, the fan speed will be always maintained at 100%, and that could be
noisy.
1
CPUFAN1
1 Ground 2 +12V
3 Sense 4
Speed Control
Signal
1
SYSFAN1/ SYSFAN2
1 Ground 2
Voltage
Control
3 Sense 4 NC
PWM Mode fan connector Voltage Mode fan connector
There are two ways to manage fan speed. One is to go to
. The other is to use application.
BIOS Hardware Monitor sub-menu allows you to set the temperature levels and the
corresponding fan speed levels.
COMMAND CENTER offers gradient points of the fan speed that allow you to adjust
fan speed in relation to CPU temperature.
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