Dell T630 Owner's Manual download pdf (Page 61)

DIMM Type

DIMMs Populated/

Channel

Operating Frequency (in

MT/s)

Maximum DIMM Rank/Channel

1.2 V

RDIMM

1 2133, 1866, 1600, and 1333 Single rank or dual rank

2 2133, 1866, 1600, and 1333 Single rank or dual rank

3 1866, 1600, and 1333 Single rank or dual rank

LRDIMM

1 2133, 1866, 1600, and 1333 Quad rank

2 2133, 1866, 1600, and 1333 Quad rank

3 1866, 1600, and 1333 Quad rank

General memory module installation guidelines

This system supports Flexible Memory Configuration, enabling the system to be configured and run in

any valid chipset architectural configuration. The following are the recommended guidelines for installing

memory modules:

• RDIMMs and LRDIMMs must not be mixed.

• x4 and x8 DRAM based DIMMs can be mixed. For more information, see Mode-specific guidelines.

• Up to three dual- or single-rank RDIMMs can be populated per channel.

• Up to three LRDIMMs can be populated per channel regardless of rank count.

• Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to

A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.

• Populate all sockets with white release tabs first, then black, and then green.

• Populate the sockets by highest rank count in the following order — first in sockets with white release

levers, then black, and then green. For example, if you want to mix single-rank and dual-rank DIMMs,

populate dual-rank DIMMs in the sockets with white release tabs and single-rank DIMMs in the

sockets with black release tabs.

• When mixing memory modules with different capacities, populate the sockets with memory modules

with highest capacity first. For example, if you want to mix 4 GB and 8 GB DIMMs, populate 8 GB

DIMMs in the sockets with white release tabs and 4 GB DIMMs in the sockets with black release tabs.

• In a dual-processor configuration, the memory configuration for each processor should be identical.

For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and

so on.

• Memory modules of different capacities can be mixed provided other memory population rules are

followed (for example, 4 GB and 8 GB memory modules can be mixed).

• Mixing of more than two DIMM capacities in a system is not supported.

• Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.

Mode-specific guidelines

Four memory channels are allocated to each processor. The allowable configurations depend on the

memory mode selected.

NOTE: You can mix x4 and x8 DRAM based DIMMs to support RAS features. However, all guidelines

for specific RAS features must be followed. x4 DRAM based DIMMs retain Single Device Data

Correction (SDDC) in memory optimized (independent channel) mode. x8 DRAM based DIMMs

require Advanced ECC mode to gain SDDC.

The following sections provide additional slot population guidelines for each mode:

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Dell T630 Owner's Manual Page 61

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