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Intel® Xeon® Processor E5-2400 Product Family
41
Thermal/Mechanical Design Guide
Thermal Solutions
5.8
DTS Based Thermal Specification
5.8.1
Compliance to Tcase Based Thermal Profile
Processor heatsink design must still comply with the Tcase based thermal profile
provided in the
Intel® Xeon® Processor E5-2400 Product Family Datasheet - Volume
One
. Heatsink design compliance can be determined with thermocouple and TTV as
with previous processors.
The heat sink is sized to comply with the Tcase based thermal profile. Customers have
an option to either follow processor based Tcase spec or follow the DTS based thermal
specification. In some situations, implementation of DTS based thermal specification
can reduce average fan power and improve acoustics as compared to the Tcase based
thermal profile.
When all cores are active, a properly sized heatsink will be able to meet the DTS based
thermal specification. When all cores are not active or when Intel Turbo Boost
Technology is active, attempting to comply with the DTS based thermal specification
may drive system fans to maximum speed. In such situations, the T
CASE
temperature
will be below the T
CASE
based thermal profile by design.
5.8.2
Considerations for Follow-on Processor
The follow-on processor in the platform will have new capabilities as compared to the
Intel® Xeon® Processor E5-2400 Product Family. For example, the follow-on processor
has a new Package Configuration Space (PCS) command to read margin (M) from the
processor: RdPkgConfig(), Index 10. For the Intel® Xeon® Processor E5-2400 Product
Family, margin (M) must be calculated in firmware.
In the following sections, implementation details specified for the Intel® Xeon®
Processor E5-2400 Product Family can also be used for the follow-on processor.
For more information regarding the differences between the follow-on processor and
the Intel® Xeon® Processor E5-2400 Product Family see
Platform Digital Thermal
Sensor (DTS) Based Thermal Specifications and Overview
.
5.8.3
DTS Based Thermal Profile, Tcontrol and Margin for the
Intel® Xeon® Processor E5-2400 Product Family
The calculation of the DTS based thermal specification is based on both Tcontrol and
the DTS Based Thermal Profile (T
DTS
):
T
DTS
= min[T
LA
+
Ψ
pa
* P * F, TEMPERATURE_TARGET [23:16] – Tcc_Offset]
Where T
LA
+
Ψ
pa
are the intercept and slope terms from the T
DTS
equations in the
appropriate External Design Specification (EDS).
To implement the DTS based thermal
specification, these equations must be programmed in firmware. Since the equations
differ with processor SKU, SKUs can be identified by TDP, Core Count and a profile
identifier (CSR bits). For associated commands, see
Platform Digital Thermal Sensor
(DTS) Based Thermal Specifications and Overview.
. As power dynamically changes, the
specification also changes, so power and T
DTS
calculations are recommended every 1
second.
Correction factor (F) compensates for the error in power monitoring. The current
estimate for F is 0.95.
Содержание Xeon E5-2400
Страница 8: ...8 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...
Страница 12: ...Introduction 12 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...
Страница 22: ...LGA1356 Socket 22 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...
Страница 44: ...Thermal Solutions 44 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...
Страница 84: ...Mechanical Drawings 84 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...
Страница 90: ...Socket Mechanical Drawings 90 Intel Xeon Processor E5 2400 Product Family Thermal Mechanical Design Guide ...