User Guide

4-40
Chapter 4: BIOS Setup
Qfan Configuration
Qfan Tuning
Click this item to automatically detect the lowest speed and congure the minimum
duty cycle for each fan.
CPU Q-Fan Control [Auto]
[Auto] Detect the type of CPU fan installed and automatically switches the
mode control.
[PWM Mode] Enable the CPU Q-Fan control feature in PWM mode for 4-pin CPU
fan.
[DC Mode] Enable the CPU Q-Fan control feature in DC mode for 3-pin CPU
fan.
[Disabled] Disable the Q-Fan control.
CPU Fan Step Up [0 sec]
This item allows you to set the value of the CPU fan step up.
Conguration options: [0 sec] [2.1 sec] [2.8 sec] [3.6 sec] [4.5 sec] [5.0 sec] [6.3 sec]
[8.5 sec] [12 sec] [25 sec]
CPU Fan Step Down [0 sec]
This item allows you to set the value of the CPU fan step down.
Conguration options: [0 sec] [2.1 sec] [2.8 sec] [3.6 sec] [4.5 sec] [5.0 sec] [6.3 sec]
[8.5 sec] [12 sec] [25 sec]
CPU Fan Speed Lower Limit [200 RPM]
This item allows you to set the low limit warning for CPU Fan speed.
Conguration options: [Ignore] [200 RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]
CPU Fan Profile [Standard]
This item allows you to set the appropriate performance level of the CPU fan.
[Standard] Set to make the CPU fan adjust automatically depending on the CPU
temperature.
[Silent] Set to minimize the fan speed for quiet CPU fan operation.
[Turbo] Set to achieve maximum CPU fan speed.
[Manual] Set to assign the detailed fan speed control parameters.
The following items appear only when you set the CPU Fan Prole to [Manual].
CPU Upper Temperature [70]
Use the <+> or <-> keys to adjust the upper limit of the CPU temperature.
The values range from 25 to 75.
CPU Fan Max. Duty Cycle (%) [100]
Use the <+> or <-> keys to adjust the maximum CPU fan duty cycle. The
values range from 20% to 100%. When the CPU temperature reaches the
upper limit, the CPU fan will operate at the maximum duty cycle.
CPU Middle Temperature [25]
Use the <+> or <-> keys to adjust the middle limit of the CPU temperature.
The values range from 20 to 75.