Dell T420 Dokumentacja Pobierz pdf (Strona 20)

20 PowerEdge T420 Technical Guide

The T420 supports the DIMMs listed in Table 9. For the latest information on supported memory,

visit Dell.com/PowerEdge.

Table 9. DIMMs supported

Capacity

(GB)

Speed

(MT/s)

Type

Ranks per

DIMM

Data

width

SDDC support

Voltage

1333

RDIMM

Advanced ECC

1.35

1600

UDIMM

Advanced ECC

1.35

1600

RDIMM

Advanced ECC

1.35

1333

RDIMM

Advanced ECC

1.35

1333

RDIMM

All modes

1.35

1600

UDIMM

Advanced ECC

1.35

1333

UDIMM

Advanced ECC

1.35

1600

RDIMM

Advanced ECC

1.35

1333

RDIMM

All modes

1.35

1600

RDIMM

All modes

1.35

1333

RDIMM

All modes

1.35

1600

RDIMM

All modes

1.35

1333

RDIMM

All modes

1.35

Memory configurations

The T420 supports flexible memory configurations ranging from capacities of 2GB to

384GB. The system supports up to six DIMMs per processor (up to 12 DIMMs in a two-processor

configuration). The T420 has three memory channels per processor, with each channel supporting

up to two DIMMs.

The T420 supports a flexible memory configuration according to these 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 can be used in a system. UDIMMs and RDIMMs cannot be

mixed.

The following additional memory population guidelines apply to the T420:

 Up to two quad-rank (QR), 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, see the

Dell PowerEdge T420 Systems Owner’s

Manual

on Dell.com/Support/Manuals.

Memory speed

The T420 supports memory speeds of 1600MT/s, 1333MT/s, 1066MT/s and 800MT/s depending on

the DIMM types installed and the configuration. All memory on all processors and channels run at

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