Intel E7-4820 AT80615005772AC 用户手册
产品代码
AT80615005772AC
Intel
®
Xeon
®
Processor E7-8800/4800/2800 Product Families
13
Specification Update
September 2012
Mixing Processor Within MP Platforms
Intel supports multiprocessor (MP) configurations consisting of processors:
1. From the same power optimization segment.
2. That support the same maximum Intel
2. That support the same maximum Intel
®
QuickPath Interconnect (Intel
®
QPI) and
DDR3 memory speeds.
3. That share symmetry across physical packages with respect to the number of
logical processors per package, number of cores per package, number of
Intel
Intel
®
QPI interfaces, and cache topology.
4. That have identical Extended Family, Extended Model, Processor Type, Family Code,
and Model Number as indicated by the function 1 of the CPUID instruction.
Note:
Connected processors must operate with the same Intel
®
QPI and core frequency.
While Intel does nothing to prevent processors from operating together, some
combinations may not be supported due to limited validation, which may result in
uncharacterized errata. Coupling this fact with the large number of Intel
®
Xeon
®
Processor E7-8800/4800/2800 Product Families attributes, the following population
rules and stepping matrix have been developed to define supported configurations.
1. Processors must be of the same power-optimization segment. This ensures
processors include the same maximum Intel
®
QPI and cache sizes.
2. Processors must operate at the same core frequency. Note: Processors within the
same power-optimization segment supporting different maximum core frequencies
(for example, a 2.26 GHz / 130 W and 2.00 GHz / 130 W) can be operated within a
system. However, both must operated at the highest frequency rating commonly
supported. Mixing components operating at different internal clock frequencies is
not supported and will not be validated by Intel.
(for example, a 2.26 GHz / 130 W and 2.00 GHz / 130 W) can be operated within a
system. However, both must operated at the highest frequency rating commonly
supported. Mixing components operating at different internal clock frequencies is
not supported and will not be validated by Intel.
3. Processors must share symmetry across physical packages with respect to the
number of logical processors per package, number of Intel
®
QPI interfaces, and
cache topology.
4. Mixing dissimilar steppings is only supported with processors that have identical
Extended Family, Extended Model, Processor type, Family Code, and Model Number
as indicated by the function 1 of the CPUID instruction. Mixing processors of
different steppings but the same model (as per CPUID instruction) is supported.
Details regarding the CPUID instruction are provided in the AP-487, Intel®
Processor Identification and the CPUID Instruction application note and Intel® 64
and IA-32 Architectures Software Developer’s Manual, Volume 2A.
as indicated by the function 1 of the CPUID instruction. Mixing processors of
different steppings but the same model (as per CPUID instruction) is supported.
Details regarding the CPUID instruction are provided in the AP-487, Intel®
Processor Identification and the CPUID Instruction application note and Intel® 64
and IA-32 Architectures Software Developer’s Manual, Volume 2A.
5. After ANDing the feature flag and extended feature flag from the installed
processors, any processor whose set of feature flags exactly matches the ANDed
feature flags can be selected by the BIOS as the BSP. If no processor exactly
matches the ANDed feature flag values, then the processors with the numerically
lower CPUID should be selected as the BSP.
feature flags can be selected by the BIOS as the BSP. If no processor exactly
matches the ANDed feature flag values, then the processors with the numerically
lower CPUID should be selected as the BSP.
6. Intel requires that the processor microcode update be loaded on each processor
operating within the system. Any processor that does not have the proper
microcode update loaded is considered by Intel to be operating out of specification.
microcode update loaded is considered by Intel to be operating out of specification.
7. The workarounds identified in this, and subsequent specification updates, must
properly applied to each processor in the system. Certain errata are specific to the
multiprocessor environment. Errata for all processor steppings will affect system
performance if not properly worked around.
multiprocessor environment. Errata for all processor steppings will affect system
performance if not properly worked around.
8. Customers are fully responsible for the validation of their system configurations.