Asus P5K - Manual (Page 96)

4-28 Chapter 4: BIOS setup
CPU Fan Profile [Optimal]
Allows you to set the appropriate performance level of the CPU Q-Fan. When
set to [Optimal], the CPU fan automatically adjusts depending on the CPU
temperature. Set this item to [Silent Mode] to minimize fan speed for quiet CPU fan
operation, or [Performance Mode] to achieve maximum CPU fan speed.
Configuration options: [Optimal] [Silent Mode] [Performance Mode]
Chassis Fan 1/2 Speed [xxxxRPM] or [Ignored] / [N/A]
The onboard hardware monitor automatically detects and displays the chassis
fan speed in rotations per minute (RPM). If the fan is not connected to the
motherboard, the field shows N/A.
Chassis Q-Fan Control [Disabled]
Allows you to enable or disable the chassis Q-Fan controller.
Configuration options: [Disabled] [Enabled]
The Chassis Fan Ratio item appears when you enable the Chassis Q-Fan
Control feature.
Chassis Fan Ratio [Auto]
Allows you to set the appropriate fan speed ratio for the chassis Q-Fan. When
set to [Auto], the chassis fan automatically adjusts depending on the chassis
temperature. Set a low ratio to minimize fan speed for quiet chassis fan operation,
or a high ratio to achieve maximum chassis fan speed.
Configuration options: [Auto] [90%] [80%] [70%] [60%]
Power Fan Speed (RPM) [xxxxRPM] or [Ignored] / [N/A]
The onboard hardware monitor automatically detects and displays the power
fan speed in rotations per minute (RPM). If the fan is not connected to the
motherboard, the field shows N/A.
Vcore Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage
The onboard hardware monitor automatically detects the voltage output through
the onboard voltage regulators. Select [Ignored] if you do not want to detect this
item.