RX2540 M2 Upgrade and Maintenance Manual 349
9.1.1 Memory sequence
9.1.1.1 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.
(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.
– RDIMMs are allowed.
– Only ECC DIMMs are allowed.
– Mixing of quad-rank DIMMs in one channel and three DIMMs in another
channel (3DPC) on the same CPU is not allowed.
Type
Ranking
1
1
SR: Single-Rank, DR: Dual-Rank, QR: Quad-Rank
Error
Correction
SR DR QR
DDR3-1600
PC3-12800
RDIMMs
(Registered DIMMs)
xxx ECC
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