ASROCK APOLLO M1 Quick Installation Manual page 85

Chassis Fan 1 Control Mode
Select PWM mode or DC mode for CHA_FAN1.
Chassis Fan 1 Setting
Select a fan mode for CHA_FAN1, or choose Customize to set 5 CPU temperatures
and assign a respective fan speed for each temperature.
Chassis Fan 1 Temp Source
Select a fan temperature source for Chassis Fan 1.
Chassis Fan 1 Step Up
Set the value of Chassis Fan 1 Step Up.
Chassis Fan 1 Step Down
Set the value of Chassis Fan 1 Step Down.
Case Open Feature
Enable or disable Case Open Feature to detect whether the chassis cover has been
removed.
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