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Independent memory mode

Independent memory mode, the default memory configuration for your server, provides the highest level of memory performance, but lacks failover protection. The DIMM installation order for independent memory mode varies based on the number of processors and memory modules installed in the server.

Figure 1. Processor and memory module layout
CPU and DIMM layout for multiple-processor systems
Independent memory mode guidelines:

  • Individual memory channels can run at different DIMM timings, but all channels must run at the same interface frequency.

  • Populate memory channel 0 first.

  • Memory channel 1 is empty or identically populated as memory channel 0.

  • Memory channel 2 is empty or identically populated as memory channel 1

  • In each memory channel, populate slot 0 first.

  • If a memory channel has two DIMMs installed, populate the DIMM with a higher number of ranks in slot 0.

The independent memory mode DIMM population sequences for each supported processor configuration are:

For information about configuring memory settings, including how to enable independent memory mode, see Memory configuration.

Note
Independent memory mode is the default memory configuration of the ThinkSystem SR950 server.