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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 on your node.

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

Available memory mode: following memory configuration is available:

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 solution based on the system configuration and memory mode that you are implementing is shown below.

Memory modules and processors layout​

Figure 1. Memory modules and processors layout
Memory module and processor location

The memory-channel configuration table below shows the relationship between the processors, memory channels, and memory module slot numbers.

Table 1. Channel and slot information of DIMMs around processors
ProcessorProcessor 1Processor 2
ChannelFEDCBAGHIJKLLKJIHGABCDEF
DIMM slot number123456789101112131415161718192021222324

One-processor configuration—DRAM DIMM installation order for Independent Mode​

Note

If processor socket 2 is empty, DIMM fillers should be removed from the DIMM slots surrounding socket 2 (slot 13 to slot 24).

Table 2. One-processor configuration—DRAM DIMM installation order for Independent Mode
ProcessorProcessor 1
DIMM slots123456789101112
8 DIMMs 2 456789 11 

Two-processor configuration—DRAM DIMM installation order for Independent Mode​

Table 3. Two-processor configuration—DRAM DIMM installation order for Independent Mode
ProcessorProcessor 1Processor 2
DIMM slots123456789101112131415161718192021222324
Total 16 DIMMs 2 456789 11  14 161718192021 23 
Total of 24 DIMMs123456789101112131415161718192021222324