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Memory module installation rules and order

Memory modules must be installed in a specific order based on the memory configuration that you implement and the number of processors and memory modules installed in the server.

Supported memory types

For information on the types of memory module supported by this server, see Memory section in Technical Specifications.

Information about optimizing memory performance and configuring memory is available at the Lenovo Press website:

Memory - Lenovo Press

In addition, you can take advantage of a memory configurator, which is available at the following site:

Lenovo Enterprise Solutions Configurator (Memory Configurations)

Specific information about the required installation order of memory modules in your server based on the system configuration and memory mode that you are implementing is shown below.

Memory modules and processor layout​

Figure 1. Memory modules and processor layout
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Memory module installation guideline​

  • This server supports Independent mode.

  • This server supports the following type of memory modules:
    • Double-data-rate 5 (TruDDR5) error correcting code (ECC) 6400 MHz clocked small outline DIMM (CSODIMM)
    • Double-data-rate 5 (TruDDR5) 5600 MHz small outline DIMM (SODIMM)

  • At least one DIMM is required for the processor. Install at least one DIMM per processor for good performance.

  • When you replace a DIMM, the server provides automatic DIMM enablement capability without requiring you to use the Setup Utility to enable the new DIMM manually.