Asus P5E3 Premium/WiFi-AP@n - Manual (Page 106)

4-34 Chapter 4: BIOS setup
Chassis Fan 1/2/3/4 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 Fan Controls [Full Speed]
Allows you to select the chassis fan control mode.
Configuration options: [Full Speed] [Manual] [Fix Speed]
The following three items appear only when you set the Chassis Fan Controls
item to [Manual] and are adjusted by typing the desired values using the
numeric keypad and press the key. You can also use the <+> and <->
keys to adjust the value.
Fan Start-Up Ratio(%) [50]
Allows you to set a start-up fan speed ratio when you power on the system.
Setting a very low ratio may cause dramatical fan speed drop and trigger
warning message.
Target Temperature (°C) [30]
If the motherboard temperature exceeds this target value, the chassis fan
speed will be auto-adjusted to cool down the motherboard to this target
temperature.
Tolerance of Temperature (°C) [02]
Allows you to set a tolerable temperature range before the chassis fan speed
increases to cool down the motherboard to the target temperature.
The following item appears only when you set the Chassis Fan Controls item
to [Fix Speed] and is adjusted by typing the desired values using the numeric
keypad and press the key. You can also use the <+> and <-> keys to
adjust the value.
Fan Fix Ratio(%) [50]
Allows you to set a fixed fan speed ratio during system operation.
Setting a very low ratio may cause dramatical fan speed drop and trigger
warning message.
CPU 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.