l A server must use the same model of DDR4 memory modules, and all the memory
modules operate at the same speed, which is the smallest value of:
l Memory speed supported by a processor
l Maximum operating speed of a memory module
l The DDR4 memory modules of different types (RDIMM and LRDIMM) and
specifications (capacity, bit width, rank, and height) cannot be used together.
l Contact your local Huawei sales representative or use the Intelligent Computing
Compatibility Checker to determine the components to be used.
l The memory can be used with Intel
®
Xeon
®
Scalable Skylake and Cascade Lake
processors. The maximum memory capacity supported varies depending on the
processor model.
– Skylake processors
n M processors: 1.5 TB/socket
n Other processors: 768 GB/socket
– Cascade Lake processors
n L processors: 4.5 TB/socket
n M processors: 2 TB/socket
n Other processors: 1 TB/socket
l The total memory capacity is the sum of the capacity of all DDR4 memory modules.
The total memory capacity cannot exceed the maximum memory capacity supported by
the CPUs.
l Use the Intelligent Computing Compatibility Checker to determine the capacity type
of a single memory module.
l The maximum number of memory modules supported by a server varies depending on
the CPU type, memory type, rank quantity, and operating voltage.
Each memory channel supports a maximum of 8 ranks. The number of memory modules
supported by each channel varies depending on the number of ranks supported by each channel:
Number of memory modules supported by each channel ≤ Number of ranks supported by each
memory channel/Number of ranks supported by each memory module
l A memory channel supports more than eight ranks for LRDIMMs.
A quad-rank LRDIMM generates the same electrical load as a single-rank RDIMM on a memory
bus.
FusionServer Pro 2288H V5 Server
User Guide
2 Hardware Description
Issue 08 (2019-10-30) Copyright © Huawei Technologies Co., Ltd. 23
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