Aaeon SBC-551 Manual page 60

CPU Warning Temperature
The LM75 chip monitors the CPU temperature and triggers alarms
depending on the BIOS settings. The temperature at which the
events are triggered range from 50C/122F to 100C/212F in 5C
increments.
Current CPU Temperature
Provides the current temperature of the CPU in both Celsius and
Fahrenheit.
CPU Speed Overheat
This setting determines what happens to the CPU speed if it is
detected to be overheating (as determined by the "CPU Warning
Temperature" setting above). The available choices are Full
Speed, 1/4, 1/3, and 1/2.
Speaker Alarm Overheat
The user can choose to have a speaker alarm sound if the CPU is
detected to be overheating (as determined by the "CPU Warning
Temperature" setting above). The choices are Enabled or Dis-
abled.
System Fan Work Control
The user can determine what happens to the additional fan
connected to CN5 (see CN5 - Fan Connector) if the CPU is detected
to be overheating (as determined by the "CPU Warning Tempera-
ture" setting above). The choices are Overheat or Always On.
52 SBC-551/552 User Manual