⚫
a: The maximum number of DDR4 memory modules is based on dual-processor
configuration. The value is halved for a server with only one processor.
⚫
b: DPC (DIMM per channel) indicates the number of memory modules per channel.
⚫
The information listed in this table is for reference only. For details, consult the local
sales representative.
5.4.1.4 DIMM Installation Rules
This section applies to a server fully configured with DDR4 memory modules. If PMem modules are
used together, see 5.4.2.4 DIMM Installation Rules.
Observe the following when configuring DDR4 memory modules:
⚫
Install memory modules only when corresponding processors are installed.
⚫
Do not install LRDIMMs and RDIMMs in the same server.
⚫
Install filler memory modules in vacant slots.
Observe the following when configuring DDR4 memory modules in specific operating mode:
⚫
Rank sparing mode
− Comply with the general installation guidelines.
− At least two ranks must be configured for each channel.
− A maximum of two standby ranks can be configured for each channel.
− The capacity of a standby rank must be greater than or equal to that of other ranks
in the same channel.
⚫
Memory mirroring mode
− Comply with the general installation guidelines.
− Each processor supports four integrated memory controllers (IMCs), and each IMC
has two channels for installing memory modules. The installed memory modules
must be identical in size and organization.
− For a multi-processor configuration, each processor must have a valid memory
mirroring configuration.
⚫
Memory scrubbing mode
− Comply with the general installation guidelines.
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