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X7SBi User's Manual
Medium
– The processor is running warmer. This is a ‘caution’ level and generally
means that there may be factors contributing to this condition. At this point, the PECI
count is above the processor’s DTS thermal throttle point minus 10 PECI counts,
but still below or equal to the DTS thermal throttle point.
High
– The processor is running hot. Take the necessary steps to correct any heat
dissipation problems. Please check the system fans, chassis ventilation and room
temperature to correct any problems. At this point, the system fans will run at full
speed. The system’s Overheat Alarm will be triggered if the DTS thermal throttle
point is reached, plus 5 PECI counts. (This is the ‘Default Alarm Setting’. To set
the Overheat Alarm to trigger earlier with the ‘Early Alarm Setting’, refer to ‘
CPU
Overheat Alarm
’ on the previous item.) The system may also shut down to prevent
damage to the processor if it is not corrected. At this level, the PECI count is 0 or
above the processor’s DTS thermal throttle point.
Notes:
Supermicro does not display CPU absolute temperatures because Intel has
changed the processor methodology to PECI (Platform Environment Con-
trol Interface) using DTS (Digital Thermal Sensors). Intel processors only
provide PECI counts as references for fan speed controls. So all our Intel
processor-based motherboards will be/have been updated to change the
CPU temperature display from numbers (absolute temperatures) to text (low,
medium, and high).
Each processor has a DTS and every processor’s DTS is individually cali-
brated at the factory. DTS’ function is to provide digital data that informs
the system of the processor’s thermal throttle point. Since this value varies
for every processor, it is impossible to assign a particular temperature level
at the BIOS level. Instead, Intel developed PECI. PECI reports a negative
value expressing the information imbedded in DTS and subtracting from it
the current temperature reading. For example, if the assigned DTS thermal
throttle point value in a processor is 85 °C and the current temperature read-
ing is 35 °C, the value reported by PECI would be -50 °C. This PECI ‘count’
is monitored by your Supermicro motherboard and has been configured to
display information according to a particular PECI ‘count’. These are displayed
in the BIOS as Low, Medium and High. A reading of “High” means that the
PECI count has exceeded the DTS thermal throttle point (PECI count of zero
and above).
Summary of Contents for Supero X7SBi
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