Asus 990FX R20, 990FXGEN3 Chassis Fan 1/4 Profile Standard, Depending on the chassis temperature

Chassis Fan 1/4 Profile [Standard]

This item appears only when you enable the Chassis Q-Fan Control feature and allows
you to set the appropriate performance level of the chassis fan.
[Standard]	Sets to [Standard] to make the chassis fan automatically adjust
	depending on the chassis temperature.
[Silent]	Sets to [Silent] to minimize the fan speed for quiet chassis fan
	operation.
[Turbo]	Sets to [Turbo] to achieve maximum chassis fan speed.
[Manual]	Sets to [Manual] to assign detailed fan speed control parameters.

The following four 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 CPU temperature.

The values range from 40ºC to 90ºC.

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 20% to 100%. When the chassis temperature reaches the upper limit, the chassis fan will operate at the maximum duty cycle.

CPU Fan Min. Duty Cycle(%) [60]

Use the <+> and <-> keys to adjust the minimum chassis fan duty cycle. The values range from 0% to 100%. When the chassis temperature is under 40ºC, the chassis fan will operate at the minimum duty cycle.

Chapter 3

3-30 Chapter 3: BIOS setup