Thermal Excursion Power For 80 W Processor; Absolute Processor Temperature - Intel Xeon 5500 Series Design Manual

Hide thumbs Also See for Xeon 5500 Series:

Table of Contents

Thermal Solutions

compliance by ensuring that the processor Tcase value, as measured on the TTV, does

not exceed Tcase_max_B at the anomalous power level for the environmental condition

of interest. This anomalous power level is equal to 75% of the TDP limit.

5.7.2

Thermal Excursion Power for 80 W Processor

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.

5.7.3

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 Intel® Xeon® Processor 5500 Series Datasheet, Volume 1 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.

Thermal/Mechanical Design Guide

Table of Contents