Asus SABERTOOTH 990FX R3.0 Manual page 82

Chassis Fan 1-3 Profile [Standard]
This item allows you to set the appropriate performance level of the chassis fan.
[Standard]
[Silent]
[Turbo]
[Manual]
The following items appear only when you set Chassis Fan Profile to [Manual].
Chassis Upper Temperature [70]
Use the <+> and <-> keys to adjust the upper limit of the chassis temperature. The
values range from 40°C to 90°C. The chassis will operate at the maximum duty cycle
when the temperature is higher than the limit.
Chassis Lower Temperature [40]
Displays the lower limit of the chassis temperature.
Chassis Fan Max. Duty Cycle(%) [60]
Use the <+> and <-> keys to adjust the maximum chassis fan duty cycle. The values
range from 60% to 100%. When the chassis temperature reaches the upper limit, the
chassis fan will operate at the maximum duty cycle.
Chassis Fan Min. Duty Cycle(%) [60]
Use the <+> and <-> keys to adjust the minimum chassis fan duty cycle. The values
range from 60% to 100%. When the chassis temperature is under 40°C, the chassis
fan will operate at the minimum duty cycle.
Water Pump Control [PWM mode]
[Disabled]
[DC mode]
[PWM mode]
The following items appear only when you set the Water Pump Control to [DC mode] or
[PWM mode].
PUMP Fan Speed Low Limit [600 RPM]
This item allows you to disable or set the water pump warning speed.
Configuration options: [Ignore] [100 RPM] [200 RPM] [300 RPM] [400 RPM] [500 RPM] [600
RPM]
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Sets to [Standard] to make the chassis fan automatically adjust depending
on the chassis temperature.
Sets to [Silent] to minimize the fan speed for quiet chassis fan operation.
Sets to [Turbo] to achieve maximum chassis fan speed.
Sets to [Manual] to assign detailed fan speed control parameters.
Disable the Water Pump control feature.
Enable the Water Pump control in DC mode for 3-pin chassis fan.
Enable the Water Pump control in PWM mode for 4-pin chassis fan.
Chapter 3: BIOS Setup