Population Rules - Fujitsu PRIMERGY RX2560 M2 Upgrade And Maintenance Manual

Main memory

10.1.1 Population rules

– Populate memory slot 1 / channel A (DIMM 1A) first.
– In case of 2 CPU configurations, populate memory slot 1 / channel E
(DIMM 1E) second.
– Within all channels, memory slot 1 must be populated prior to slot 2.
Slot 2 must be populated prior to slot 3 (for all CPUs).
– If memory modules with different ranks are used, always populate the higher
number rank DIMM first (starting from slot 1).
– If memory modules with different capacities are used:
– Populate modules with higher capacities first.
– Within a channel, populate modules in descending order of capacity.
– If memory modules with different speeds are used, the lowest clock rate
applies for all DIMMs.
Regardless of the mode, all DIMMs will run at the highest common
frequency that is allowed by the SPD Data of the DIMMs and the maximum
speed of the selected configuration.
– Mixing RDIMMs or LRDIMMs is not allowed.
– Mixing of LRDIMM with 3DS LRDIMM is not allowed.
– Mixing of RDIMM with 3DS RDIMM is not allowed.
– Mixing DIMM w/SDCC (chip kill function) and w/o SDCC is not allowed.
– When single, dual or quad rank DIMMs are populated for 2DPC or 3DPC,
always populate the higher number rank DIMM first (starting from the
farthest slot). For a 3SPC example, first populate with quad rank DIMMs in
the DIMM0 slot. Then dual rank DIMMs in the DIMM1 slot. Then single rank
DIMMs in DIMM2 slot.
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Upgrade and Maintenance Manual TX2560 M2 / RX2560 M2