Asus P5E - Manual (Page 98)

4-32 Chapter 4: BIOS setup
Chassis Q-Fan Controls [Disabled]
Allows you to enable or disable the Chassis Q-fan.
Configuration options: [Disabled] [Enabled]
The following items appear only when you enable Chassis Q-Fan Control.
Chassis Fan Ratio [Auto]
Allows you to select a fan speed ratio in the low CPU temperature.
Configuration options [Auto] [90%] [80%] [70%] [60%]
A very low fan speed ratio may cause fan speed drop and trigger the hardware
monitor warning message.
Chassis Target Temperature [37°C]
Chassis fan speed will auto-adjust to reach this target temperature.
Configuration options: [28°C] [31°C] [34°C] [37°C] [40°C] [43°C] [46°C]
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.