Asus TUF Z270 MARK 2 Bios Manual page 57

AIO PUMP Control
[Disabled]
[Auto]
[DC mode]
[PWM mode]
Chassis Intrusion Detection Support
Enable this item for chassis intrusion detection function.
ASUS TUF Z270 MARK 2 BIOS Manual
Disables the AIO PUMP control feature.
Detects the type of AIO pump installed and automatically switches the
control modes.
Enables the AIO PUMP control in DC mode for 3-pin chassis fan.
Enables the AIO PUMP control in PWM mode for 4-pin chassis fan.
57