Lenovo ThinkSystem SR650 Series Setup Manual page 150

• When you install two or more DCPMMs, all DCPMMs must have the same Lenovo part number.
• All DRAM memory modules installed must have the same Lenovo part number.
• 16 GB RDIMM has two different types: 16 GB 1Rx4 and 16 GB 2Rx8. The part number of the two types
are different.
• Supported memory capacity range varies with the following types of DCPMMs.
– Large memory tier (L): The processors with L after the four digits (for example: Intel Xeon 5215 L)
– Medium memory tier (M): The processors with M after the four digits (for example: Intel Xeon Platinum
8280 M)
– Other: Other processors that support DCPMMs (for example: Intel Xeon Gold 5222)
In addition, you can take advantage of a memory configurator, which is available at the following site:
http://1config.lenovo.com/#/memory_configuration
The following illustration helps you to locate the memory module slots on the system board.
Figure 81. memory module slots on the system board
App Direct Mode
Memory modules must be installed in a specific order based on the memory configuration that you
implement on your system. Follow the information of App Direct Mode as below.
Note: Before installing DCPMM, refer to "Memory configuration" on page 202 and "Configure DC Persistent
Memory Module (DCPMM)" on page 202 for the requirements.
Table 15. Four categories of DIMM
DIMM Category DDR4 Type
D1 RDIMM
D2 RDIMM
D3 RDIMM
D4 RDIMM
Following are all the combinations that are supported in this solution.
App Direct Mode with one processor
Note: When adding one or more DCPMMs and DIMMs during a memory upgrade, you might need to move
other DIMMs that are already installed to new locations.
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Capacity
3DS RDIMM Any density of DDR4 except 8 GB 1Rx8 RDIMM
3DS RDIMM All density of DDR4 more than 32 GB
16 GB or 32 GB RDIMM
3DS RDIMM Any density of DDR4 except 8 GB 1Rx8 RDIMM