User`s manual
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X8DTU/X8DTU-F User’s Manual
tion to the motherboard what its ‘Temperature Tolerance’ is, and not the other way 
around. This results in better CPU thermal management.
Supermicro has leveraged this feature by assigning a temperature status to certain 
thermal conditions in the processor (Low, Medium and High). This makes it easier 
for the user to understand the CPU’s temperature status, rather than by just simply 
seeing a temperature reading (i.e., 25
o
C). The CPU Temperature feature will display 
the CPU temperature status as detected by the BIOS:
Low – This level is considered as the ‘normal’ operating state. The CPU temperature 
is well below the CPU ‘Temperature Tolerance’. The motherboard fans and CPU will 
run normally as confi gured in the BIOS (Fan Speed Control). 
User intervention: No action required.
Medium – The processor is running warmer. This is a ‘precautionary’ level and 
generally means that there may be factors contributing to this condition, but the CPU 
is still within its normal operating state and below the CPU ‘Temperature Tolerance’. 
The motherboard fans and CPU will run normally as confi gured in the BIOS. The 
fans may adjust to a faster speed depending on the Fan Speed Control settings.
User intervention: No action is required. However, consider checking the CPU fans 
and the chassis ventilation for blockage.
High – The processor is running hot. This is a ‘caution’ level since the CPU’s ‘Tem-
perature Tolerance’ has been reached (or has been exceeded) and may activate 
an overheat alarm. 
User intervention: If the system buzzer and Overheat LED has activated, take action 
immediately by checking the system fans, chassis ventilation and room temperature 
to correct any problems. 
Notes: 1. The system may shut down if it continues for a long period to 
prevent damage to the CPU.
2. The information provided above is for your reference only. For more 
information on thermal management, please refer to Intel’s Web site at 
www.Intel.com.
System Temperature: The system temperature will be displayed (in degrees in 
Celsius and Fahrenheit) as it is detected by the BIOS. 
Fan 1 ~ Fan 8 Reading
This feature displays the fan speed readings from fan interfaces Fan 1 through 
Fan 8.
Fan Speed Control Modes
This feature allows the user to decide how the system controls the speeds of the 
onboard fans. The CPU temperature and the fan speed are correlative. When the 










