RX2520 M1
Upgrade and Maintenance Manual
223
Main memory
10.1.1 Memory sequence
10.1.1.1 Population rules
– Populate memory slot 1 / channel A (DIMM 1A) first.
– In case of dual processor configurations, populate memory slot
1 / channel D (DIMM 1D) 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.
Summary of Contents for PRIMERGY RX2520 M1
Page 36: ...36 Upgrade and Maintenance Manual RX2520 M1 Before you start ...
Page 120: ...120 Upgrade and Maintenance Manual RX2520 M1 Power supply units ...
Page 162: ...162 Upgrade and Maintenance Manual RX2520 M1 Hard disk drives solid state drives ...
Page 220: ...220 Upgrade and Maintenance Manual RX2520 M1 Expansion cards and backup units ...
Page 230: ...230 Upgrade and Maintenance Manual RX2520 M1 Main memory ...
Page 310: ...310 Upgrade and Maintenance Manual RX2520 M1 Accessible drives ...
Page 410: ...410 Upgrade and Maintenance Manual RX2520 M1 Cables ...