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25 PowerEdge R720 and R720xd Technical Guide

The R720 and R720xd support 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 the same speed and voltage. By default, the systems run at the highest speed for the

channel with the lowest DIMM voltage and speed. The operating speed of the memory is also

determined by the maximum speed supported by the processor, the speed settings in the BIOS, and

the operating voltage of the system.

Table 9 lists the memory configuration and performance details for the R720 and R720xd, based on

the population of the number and type of DIMMs per memory channel.

DIMM

type

DIMM 0

DIMM 1

DIMM 2

Number

DIMMs

Speed (MT/s)

800*

1066*

1333

1600

UDIMM

∞

RDIMM

∞

*Although the R720 and R720xd support DIMM speeds of 800MT/s and 1066MT/s, you can only purchase these systems

with DIMM speeds of 1333MT/s and 1600MT/s on Dell.com.

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Dell H810 Specifiche Pagina 25