Asus P5W - Manual (Page 113)

ASUS P5W -
Power Fan1/2 Speed [xxxxRPM] or [N/A] or [Ignored]
The onboard hardware monitor automatically detects and displays the power fan
speed in rotations per minute (RPM). If the fan is not connected, the specific field
shows N/A. Select [Ignored] from the item options to disable power fan speed
monitoring.
PWR Q-Fan Control [Enabled]
Allows you to enable or disable the ASUS Q-Fan feature that smartly adjusts the
power fan speeds for more efficient system operation. Configuration options:
[Disabled] [Enabled]
PWR Fan Profile [Optimal]
Allows you to set the appropriate performance level of the power Q-Fan.
Configuration options: [Optimal] [Silent Mode] [Performance Mode]
VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage
The onboard hardware monitor automatically detects the voltage output through
the onboard voltage regulators.