Dell PowerEdge R420 Manual técnico - Página 18
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The R420 supports memory speeds of 1600 MT/s, 1333 MT/s, 1066 MT/s, and 800 MT/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 memory configuration and performance details for the R420 based on the population
of the number and type of DIMMs per memory channel.
DIMM
DIMM 0
type
UDIMM
RDIMM
Reliability, availability, serviceability (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 that require service. Table 10 describes the RAS
features supported on the R420.
Feature
Dense configuration
optimized profile
Number
DIMM 1
of
DIMMs
SR
1
DR
1
SR
SR
2
SR
DR
2
DR
DR
2
SR
1
DR
1
QR
1
SR
SR
2
SR
DR
2
DR
DR
2
QR
SR
2
QR
DR
2
QR
QR
2
Description
Increased memory reliability can be a result from this selectable platform profile
that adjusts parameters to reduce faults regarding refresh rates, speed,
temperature and voltage
Speed (MT/s)
800
1066
1333
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
1600
∞
∞
∞
∞