Dell DX6000G Manual do Utilizador descarregar pdf (Página 112)

112 Installing System Components

– For quad-rank memory modules:

• One memory module per channel supports up to 1067 MHz.

• Two memory modules per channel are limited to 800 MHz,

regardless of memory module speed.

• If quad-rank memory modules are mixed with single- or dual-rank

modules, the quad-rank modules must be installed in the sockets with the

white release levers.

• If memory modules with different speeds are installed, they will operate at

the speed of the slowest installed memory module(s).

Mode-Specific Guidelines

Three memory channels are allocated to each processor. The number of

channels used and the allowable configurations depend on the memory mode

selected.

Advanced ECC (Lockstep) Mode Support

In this configuration, the two channels closest to the processor are combined

to form one 128-bit channel. This mode supports Single Device Data

Correction (SDDC) for both x4- and x8-based memory modules. Memory

modules must be identical in size, speed, and technology in

corresponding slots.

Memory Mirroring Support

The system supports memory mirroring if identical memory modules are

installed in the two channels closest to the processor (memory should not be

installed in the farthest channel). Mirroring must be enabled in the System

Setup program. In a mirrored configuration, the total available system

memory is one-half of the total installed physical memory.

Optimizer (Independent Channel) Mode

In this mode, all three channels are populated with identical memory

modules. This mode permits a larger total memory capacity but does not

support SDDC with x8-based memory modules.

A minimal single-channel configuration of one 1 GB memory module per

processor is also supported in this mode.

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Dell DX6000G Manual do Utilizador Página 112