Silicon Graphics InfiniteStorage 3500, User Manual, Page: 86 / 106

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6: BIOS
threshold temperature as predefined 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 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:
CPU Temperature
The CPU thermal technology that reports absolute temperatures (Celsius/Fahrenheit) 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 (for
example, 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.
The ISS3500 system leverages 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
(for example, 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
configured 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 configured in the BIOS. The fans may adjust to a faster speed depending on the
Fan Speed Control settings.