Thermal Solutions
40
Thermal/Mechanical Design Guide
5.7.2
Thermal Excursion Power for Processors with Single
Thermal Profile
Under fan failure or other anomalous thermal excursions, Tcase may exceed the
thermal profile for a duration totaling less than 360 hours per year without affecting
long term reliability (life) of the processor. For more typical thermal excursions,
Thermal Monitor is expected to control the processor power level as long as conditions
do not allow the Tcase to exceed the temperature at which Thermal Control Circuit
(TCC) activation initially occurred. Under more severe anomalous thermal excursions
when the processor temperature cannot be controlled at or below this Tcase level by
TCC activation, then data integrity is not assured. At some higher threshold,
THERMTRIP# will enable a shut down in an attempt to prevent permanent damage to
the processor. Thermal Test Vehicle (TTV) may be used to check anomalous thermal
excursion compliance by ensuring that the processor Tcase value, as measured on the
TTV, does not exceed Tcase_max at the anomalous power level for the environmental
condition of interest. This anomalous power level is equal to 75% of the TDP limit.
This guidance can be applied to 80 W Intel Xeon processor 5500 series, 80W Intel Xeon
processor 5600 series and 130 W Intel Xeon processor 5600 series.
5.7.3
Absolute Processor Temperature
Intel does not test any third party software that reports absolute processor
temperature. As such, Intel cannot recommend the use of software that claims this
capability. Since there is part-to-part variation in the TCC (thermal control circuit)
activation temperature, use of software that reports absolute temperature can be
misleading.
See the appropriate datasheet for details regarding use of
IA32_TEMPERATURE_TARGET register to determine the minimum absolute
temperature at which the TCC will be activated and PROCHOT# will be asserted.
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Summary of Contents for X5550 - Quad Core Xeon
Page 8: ...8 Thermal Mechanical Design Guide ...
Page 12: ...Introduction 12 Thermal Mechanical Design Guide ...
Page 24: ...Independent Loading Mechanism ILM 24 Thermal Mechanical Design Guide Figure 3 3 ILM Assembly ...
Page 26: ...Independent Loading Mechanism ILM 26 Thermal Mechanical Design Guide ...
Page 48: ...Component Suppliers 48 Thermal Mechanical Design Guide ...
Page 82: ...Mechanical Drawings 82 Thermal Mechanical Design Guide ...
Page 88: ...Socket Mechanical Drawings 88 Thermal Mechanical Design Guide ...
