Asus P5KR - Manual (Page 99)

ASUS P5KR 4-29
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.
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.