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” on page 3.
Your server has 24 memory slots with 24 channels. For a list of supported memory options, see:
https://static.lenovo.com/us/en/serverproven/index.shtml.
Information about optimizing memory performance and configuring memory is available at the Lenovo Press
website:
https://lenovopress.com/servers/options/memory
In addition, you can take advantage of a memory configurator, which is available at the following site:
https://dcsc.lenovo.com/#/memory_configuration
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.
Your server has 12 channels, 24 memory slots, and supports:
• Minimum memory:
– 16 GB
• Maximum memory:
– RDIMM: 1.5 TB using 24 x 16GB RDIMMs
• Type (depending on the model):
– TruDDR5 4800, single-rank, 16 GB/32 GB RDIMM
– TruDDR5 4800, dual-rank, 32 GB/64 GB RDIMM
The following illustration helps you to locate the memory module slots on the system board (system board
assembly).
Note: It is recommended to install memory modules with the same rank in each channel.
Chapter 5. Hardware replacement procedures 39
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