Dell PowerEdge R420 Technical Manual

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Dell PowerEdge R420 Technical Manual Manual pdf 18 page image

The R420 supports memory speeds of 1600 MT/s, 1333 MT/s, 1066 MT/s, and 800 MT/s dependingon the DIMM types installed and the configuration. All memory on all processors and channels runat the same speed and voltage. By default, the systems run at the highest speed for the channel withthe lowest DIMM voltage and speed. The operating speed of the memory is also determined by themaximum speed supported by the processor, the speed settings in the BIOS, and the operatingvoltage of the system.Table 9 lists memory configuration and performance details for the R420 based on the populationof the number and type of DIMMs per memory channel.DIMMtype DIMM 0 DIMM 1NumberofDIMMsSpeed (MT/s)800 1066 1333 1600UDIMMSR 1 ∞ ∞ ∞DR 1 ∞ ∞ ∞SR SR 2 ∞ ∞ ∞SR DR 2 ∞ ∞ ∞DR DR 2 ∞ ∞ ∞RDIMMSR 1 ∞ ∞ ∞ ∞DR 1 ∞ ∞ ∞ ∞QR 1 ∞ ∞SR SR 2 ∞ ∞ ∞ ∞SR DR 2 ∞ ∞ ∞DR DR 2 ∞ ∞ ∞ ∞QR SR 2 ∞QR DR 2 ∞QR QR 2 ∞Reliability, availability, serviceability (RAS) features help keep the system online and operationalwithout 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 RASfeatures supported on the R420.Feature DescriptionDense configurationoptimized profileIncreased memory reliability can be a result from this selectable platform profilethat adjusts parameters to reduce faults regarding refresh rates, speed,temperature and voltage