64-bit Intel Xeon Processor with 2MB L2 Cache Thermal/Mechanical Design Guidelines

Thermal/Mechanical Reference Design
18 64-bit Intel® Xeon™ Processor with 2MB L2 Cache Thermal/Mechanical Design Guidelines
the Thermal Monitor features. Measurable performance loss is defined to be any degradation in the
processor’s performance greater than 1.5%. The 1.5% number is chosen as the baseline since the
run-to-run variation in a given performance benchmark is typically between 1 - 2%.
Although designing to Thermal Profile B results in increased T
CASE
temperatures compared to
Thermal Profile A at a given power level, both of these Thermal Profiles ensure that Intel’s long-
term processor reliability requirements are satisfied. In other words, designing to Thermal Profile
B does not impose any additional risk to Intel’s long-term reliability requirements. Thermal
solutions that exceed Thermal Profile B specification are considered incompliant and will
adversely affect the long-term reliability of the processor.
Refer to the 64-bit Intel
®
Xeon™ Processor with 2MB L2 Cache Datasheet or Section 2.2.4 for the
Thermal Profile A and Thermal Profile B specifications. Section 2.4 of this document also provides
details on the 2U+ and 1U Intel reference thermal solutions that are designed to meet the 64-bit
Intel Xeon Processor with 2MB L2 Cache Thermal Profile A and Thermal Profile B respectively.
2.2.4 Performance Targets
The Thermal Profile specifications for this processor are published in the 64-bit Intel
®
Xeon™
Processor with 2MB L2 Cache Datasheet. These Thermal Profile specifications are shown as a
reference in the subsequent discussions.
Note: The thermal specifications shown in this graph are for reference only. Refer to the 64-bit Intel
®
Xeon™ Processor with 2MB L2 Cache Datasheet for the Thermal Profile specifications. In case of
conflict, the data information in the datasheet supersedes any data in this figure.
Figure 2-5. Thermal Profiles A and B for the 64-bit ntel
®
Xeon™ Processor with 2MB L2 Cache