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Memory module installation rules and order

Memory modules must be installed in a specific order based on the memory configuration of the server.

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

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

Figure 1. DIMM and processor location
DIMM location
Table 1. DIMM and processor location
1 DIMM connectors 13–184 Processor socket 1
2 Processor socket 25 DIMM connectors 7–12
3 DIMM connectors 1–66 DIMM connectors 19–24
Table 2. Channel and slot information of DIMMs around processor 1 and 2.

The memory-channel configuration table is a three-column table that shows the relationship between the processors, memory controllers, memory channels, slot number and the DIMM connectors.

Integrated Memory Controller (iMC)Controller 0Controller 1
ChannelChannel 2Channel 1Channel 0Channel 0Channel 1Channel 2
DIMM connector (processor 1)123456789101112
DIMM connector (processor 2)242322212019181716151413