Hp ProLiant DL580 G7 Server Manual de usuario descargar pdf (Pagina 48)

Hardware options installation 48

• 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, both memory cartridges must be installed and

populated with equal memory capacities based on the DIMM installation guidelines (on page 44).

• Greater performance is obtained when all cartridges are populated with either four or eight dual- or

quad-rank DIMMs.

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

The following illustration shows examples of Hemisphere mode and non-Hemisphere mode populations.

The two non-Hemisphere examples show the following:

• Each memory controller must have a cartridge installed.

• The DIMM configurations of each cartridge connected to controller 1 and 2 of a processor must be

identical.

Example 4 is a Hemisphere mode configuration as the two cartridges connected to each processor are

configured identically, even though cartridges 1 and 2 are not identical to cartridges 3 and 4.

Memory performance optimization

The HP ProLiant DL580 G7 Server supports 64 DIMMs across four multi-core processors. While there are

many DIMM population configurations that can support any total memory size, optimal performance is

achieved when populated DIMMs can take advantage of the Intel® Xeon® Processor E7-series and

7500-series processor architecture.

To achieve the best performance for a given memory processor configuration, observe the following

guidelines:

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Hp ProLiant DL580 G7 Server Manual de usuario Pagina 48