Intel X5472 Mechanical Design Guidelines - Page 32

Thermal/Mechanical Reference Design Table 2-5. Intel Reference Heatsink Performance Targets for the Quad-Core Intel® Xeon® Processor E5400 Series Parameter Maximum Unit Notes Altitude TLA TDP Sea-Level m 40 °C 80 W Heatsink designed at 0 meters 1U CEK TCASE_MAX Airflow Pressure Drop ψCA 67 15 25.5 0.331 82.4 0.246 °C CFM m3 / hr Inches of H2O Pa °C/W 1U Alternative Heatsink Airflow through the heatsink fins Mean + 3σ TCASE_MAX Airflow Pressure Drop ψCA 67 15 25.5 0.331 82.4 0.331 °C CFM m3 / hr Inches of H2O Pa °C/W Airflow through the heatsink fins Mean + 3σ Note: Intel does not enable reference heatsink for the Quad-Core Intel® Xeon® Processor X5482 with 150W TDP. The Intel 2U CEK is capable of meeting the thermal specification when local ambient temperature (TLA) is maintained at or below 35°C. 2.3 Note: Fan Fail Guidelines Under fan failure or other anomalous thermal excursions, Tcase may exceed Thermal Profile [Thermal Profile B for Quad-Core Intel® Xeon® Processor X5400 Series] 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 Vehicles (TTVs) 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 [Tcase_max_B for Quad-Core Intel® Xeon® Processor X5400 Series] at the anomalous power level for the environmental condition of interest. This anomalous power level is equal to 80% of the TDP limit for Quad-Core Intel® Xeon® Processor X5400 Series with 120W TDP and 90% of the TDP limit for Quad-Core Intel® Xeon® Processor E5400 Series with 80W TDP. Fan Failure Guidelines apply only to SKUs which have Thermal Monitor2 enabled. 32 Quad-Core Intel® Xeon® Processor 5400 Series TMDG