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General memory module, Installation guidelines – Dell PowerEdge C2100 User Manual

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Installing System Components

• Single-rank, and dual-rank RDIMMs of sizes 1 GB, 2 GB, 4 GB, 8 GB

and 16 GB are supported for a total of up to 288 GB.

• Quad-rank RDIMMs (two per channel) are supported for a total of

up to 48 GB.

General Memory Module Installation Guidelines

To ensure optimal performance of your system, observe the following general

guidelines when configuring your system memory.

NOTE:

Memory configurations that fail to observe these guidelines can prevent

your system from starting and producing any video output.

• Except for memory channels that are unused, all populated memory

channels must have identical configurations.

• The memory configuration for each processor must be identical.
• Memory modules of different sizes can be mixed in A1–A4 or B1–B4

(for example, 2 GB and 4 GB), but all populated channels must have

identical configurations.

• For optimizer mode, memory modules are installed in the numeric order of

the sockets beginning with A1 or B1.

• For memory mirroring or advanced ECC mode, the channel furthest from

the processor is unused and memory modules are installed beginning with

channel A1 or B1 and proceeding with channel A2 or B2.

• Advanced ECC mode requires memory modules that use x4 or x8 DRAM

device widths.

• The memory speed of each channel depends on the

memory configuration:

For single- or dual-rank memory modules:
• One memory module per channel supports up to 1333 MHz.
• Two memory modules per channel support up to 1066 MHz.
• Three memory modules per channel support up to 800 MHz,

regardless of memory module speed.

For quad-rank memory modules:
• One memory module per channel supports up to 1066 MHz.

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