Asus P5K3 Deluxe - Manual (Page 98)

4-30 Chapter 4: BIOS setup
The following item appears only when you enable CPU Q-Fan Control.
CPU Fan Profile [Optimal]
Allows you to set the appropriate performance level of the ASUS 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 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]