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The options are:
•
The Early Alarm: Select this setting if you want the CPU overheat alarm (includ-
ing the LED and the buzzer) to be triggered as soon as the CPU temperature
reaches the CPU overheat threshold as predefi ned by the CPU manufacturer.
•
The Default Alarm: Select this setting if you want the CPU overheat alarm
(including the LED and the buzzer) to be triggered when the CPU temperature
o
reaches about 5
C above the threshold temperature as predefi ned by the CPU
manufacturer to give the CPU and system fans additional time needed for CPU
and system cooling. In both the alarms above, please take immediate action
as shown below.
CPU 1 Temperature/CPU 2 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 thermal technology that reports absolute temperatures (Celsius/Fahren-
heit) 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 serverboard can read. This 'Temperature Threshold' or 'Temperature Tolerance'
has been assigned at the factory and is the baseline on which the serverboard takes
action during different CPU temperature conditions (i.e., by increasing CPU Fan
speed, triggering the Overheat Alarm, etc). Since CPUs can have different 'Tem-
perature Tolerances', the installed CPU can now send information to the serverboard
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
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 serverboard 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 serverboard 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.
o
C). The CPU Temperature feature will display
7-15
Chapter 7: BIOS
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