Chapter 4: AMI BIOS
4-17
CPU1 Temperature/CPU2 Temperature/System Temperature
This feature displays current temperature readings for the CPU and the System.
The following items will be displayed for your reference only:
CPU1 Temperature/CPU2 Temperature
The CPU Temperatures 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. The system may shut down if it continues for a long period to
prevent damage to the CPU.
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:
The CPU thermal technology that reports absolute temperatures (Celsius/Fahr-
enheit) has been upgraded to a more advanced feature by Intel in its newer
processors. The basic concept is each CPU is embedded by unique temperature
information that the motherboard can read. This ‘Temperature Threshold’ or
‘Temperature Tolerance’ has been assigned at the factory and is the baseline on
which the motherboard takes action during different CPU temperature conditions
(i.e., by increasing CPU Fan speed, triggering the Overheat Alarm, etc). Since
CPUs can have different ‘Temperature Tolerances’, the installed CPU can now
send information 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).
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