Dell PowerEdge M520 Technisch handboek - Pagina 19

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Dell PowerEdge M520 Technisch handboek

Memory speed

The M520 server 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 the same speed and voltage. By default, the system runs 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 8 lists the memory configuration and performance details for the M520, based on the
population of the number and type of DIMMs per memory channel.
DIMM
DIMM 0
type
SR
DR
UDIMM
SR
SR
DR
SR
DR
QR
SR
SR
DR
RDIMM
QR
QR
QR
SR
SR
SR
DR
*Although the M520 supports DIMM speeds of 800MT/s and 1066MT/s, you can only purchase this system with DIMM
speeds of 1333MT/s and 1600MT/s on Dell.com/PowerEdge.

Memory RAS features

RAS features help keep the system online and operational without significant impact to
performance, and can decrease data loss and crashing due to errors. RAS aids in rapid, accurate
diagnosis of faults which require service. Table 9 describes the memory RAS features supported on
the M520.
PowerEdge M520 Technical Guide
19
Table 8.
Memory speed capabilities
DIMM 1
DIMM 2
DIMMs
SR
DR
DR
SR
DR
DR
SR
DR
QR
SR
SR
SR
DR
DR
DR
DR
DR
Speed (MT/s)
# of
800*
1066*
1
1
2
2
2
1
1
1
2
2
2
2
2
2
3
3
3
3
1333
1600