Hp ProLiant BL680c G7 Server-Blade Instrukcja Użytkownika Pobierz pdf (Strona 52)

Hardware options installation 52

Hemisphere mode

The Intel® Xeon® E7 family and 7500 series processor architectures incorporate Hemisphere mode, a

high-performance interleaving technology. Hemisphere mode combines the tracking resources of both

memory controllers within each processor for a more aggressive cache line pipelining.

Hemisphere mode is enabled when processors in the system have identical DIMM populations behind both

of their memory controllers. Observe the following guidelines:

• Hemisphere mode is controlled via an RBSU option, enabling the user to select either automatic (default)

or disable.

• In automatic mode, the BIOS enables Hemisphere mode if the system memory configuration is

compatible with Hemisphere mode.

• Hemisphere mode should produce the best overall performance for a variety of applications. However,

Hemisphere mode can be disabled if it produces lower performance for a particular application.

• To enable each processor to enter Hemisphere mode, all memory controllers must be installed and

populated with equal memory capacities based on the DIMM installation guidelines (on page 49).

• Greater performance is obtained when all memory controllers are populated with either four or eight

dual- or quad-rank DIMMs.

• Mirrored Memory mode is not supported when Hemisphere mode is enabled.

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Hp ProLiant BL680c G7 Server-Blade Instrukcja Użytkownika Strona 52