5.4.2.3 Memory Compatibility
Observe the following rules when configuring DC persistent memory modules
(DCPMMs):
⚫
The DCPMMs must be used with the DDR4 memory modules. For details, see the
FusionServer DCPMM User Guide.
⚫
Contact your local sales representative or use the Compatibility Checker to
determine the components to be used.
⚫
The memory must be used with Intel
®
Xeon
®
Scalable Cascade Lake processors.
The maximum memory capacity supported varies depending on the processor
model.
− L processors: 4.5 TB/socket
− M processors: 2 TB/socket
− Other processors: 1 TB/socket
⚫
The DCPMM can work only in App Direct Mode (AD) and Memory Mode (MM).
The total supported memory capacity is calculated as follows:
− DCPMM in AD mode
Total memory capacity = Total capacity of all DCPMMs + Total capacity of all
DDR4 memory modules
− DCPMM in MM mode
Total memory capacity = Total capacity of all DCPMMs (The DDR4 memory
modules are used as the cache and therefore are not calculated as memory
capacity.)
⚫
The total memory capacity cannot exceed the maximum memory capacity
supported by the CPUs.
⚫
For details about the AD and MM modes, see "Operating Modes" in FusionServer
DCPMM User Guide.
⚫
Use the Compatibility Checker to determine the capacity type of a single memory
module.
Table 5-8 DCPMM specifications
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General