Dell PowerEdge 2450 Specifications download pdf (Page 18)

18 PowerEdge M520 Technical Guide

Table 7 lists the DIMMs that are supported on the M520. For the latest information on supported

memory, visit Dell.com/PowerEdge.

Table 7. DIMMs supported

Only

Capacity

(GB)

Speed

(MT/s)

Type

Ranks

per

DIMM

Data

width

SDDC support

Voltage

1600

RDIMM

Advanced ECC

1.35

1333

RDIMM

Advanced ECC

1.35

1600

UDIMM

Advanced ECC

1.35

1333

RDIMM

Advanced ECC

1.35

1600

RDIMM

Advanced ECC

1.35

1333

RDIMM

All modes

1.35

1333

RDIMM

Advanced ECC

1.35

1600

UDIMM

Advanced ECC

1.35

1333

RDIMM

All modes

1.35

1600

RDIMM

All modes

1.35

1600

RDIMM

All modes

1.35

1333

RDIMM

All modes

1.35

1333

RDIMM

All modes

1.35

Memory configurations

The M520 server supports flexible memory configurations ranging from capacities of 2GB to 384GB,

and up to 6 DIMMs per processor (up to 12 DIMMs in a dual-processor configuration). Each

processor has 3 memory channels, with each channel supporting up to 2 DIMMs.

Flexible memory configuration

The M520 supports a flexible memory configuration, according to the following basic rules:

 Speed: If DIMMs of different speeds are mixed, all channels across all processors operate at the

slowest DIMM’s common frequency.

 DIMM type: Only one type of DIMM is allowed per system: UDIMM or RDIMM. These types

cannot be mixed.

The following additional memory-population guidelines also apply to the M520:

 Up to two quad-rank (QR) DIMMs and up to three dual-rank (DR) or single-rank (SR) DIMMs may

be populated per channel.

 DIMMs must be installed in each channel, starting with the DIMM farthest from the processor.

 DIMMs should be installed with largest rank count to smallest. For example, if DR DIMMS are

mixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SR

DIMMs.

For more information on memory configuration and population, see the

Dell PowerEdge M520

Systems Owner’s Manual

on Dell.com/Support/Manuals.

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