Asus P5N72-T Premium - Manual (Page 106)

4-36 Chapter 4: BIOS setup
CHASSIS FAN Duty Cycle [100%]
Allows you to set the fan duty cycle. This item becomes configurable when
you set the CHASSIS FAN Control item to [Duty Cycle Mode].
Configuration options: [60%] [70%] [80%] [90%] [100%]
CHASSIS FAN Q-Fan Sense [CPU Temperature]
Allows the Q-Fan to sense the CPU/MB temperature and to adjust the fan
speed. This item becomes configurable when you set the CHASSIS FAN
Control item to [Q-FAN Mode].
Configuration options: [CPU Temperature] [MB Temperature]
CPU Fan Speed warning [600 RPM]
Allows you to set the CPU fan warning speed function, which gives off a warning
when the CPU fan speed is too low. If you set this item to [Disabled], the system
will not warn you even if no fan is installed or if the fan is not functioning properly.
Configuration options: [Disabled] [600 RPM] [1200 RPM] [1600 RPM]