Fusion FusionServer 5288 V5 - Page 28

FusionServer 5288 V5 Server
Technical White Paper
5 Hardware Description
Issue 07 (2023-04-30)
Copyright © xFusion Digital Technologies Co., Ltd.
22
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The total memory capacity cannot exceed the maximum memory capacity
supported by the CPUs.
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The total memory capacity refers to the capacity when DDR4 DIMMs are fully
configured. For details about the memory capacity when DCPMMs are used
together with DDR4 DIMMs, see 5.4.2.3 Memory Compatibility.
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Use the Compatibility Checker to determine the capacity type of a single memory
module.
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The maximum number of DIMMs 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 DIMMs supported by
each channel varies depending on the number of ranks supported by each channel:
Number of DIMMs supported by each channel ≤ Number of ranks supported by each memory
channel/Number of ranks supported by each DIMM
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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.
Table 5-6 DDR4 memory specifications
Parameter
Specifications
Maximum capacity per DDR4 DIMM (GB)
128
Rated speed (MT/s)
2933
Operating voltage (V)
1.2
Maximum number of DDR4 DIMMs in a server
a
24
Maximum DDR4 memory capacity of the server (GB)
b
3072
Maximum operating
speed (MT/s)
1DPC
c
2933
d
2DPC
2666
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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.
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b: The maximum DDR4 memory capacity varies depending on the processor
type. The value listed in this table is based on the assumption that DIMMs are
fully configured.
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c: DPC (DIMM per channel) indicates the number of DIMMs per channel.
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d: If the Cascade Lake processor is used, the maximum operating speed of a
DIMM can reach 2933 MT/s. If the Skylake processor is used, the maximum
operating speed of a DIMM can reach 2666 MT/s only. Different CPUs possess
different specifications, For details about the CPU parameters, see the Intel
official website.
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The information listed in this table is for reference only. For details, consult the
local sales representative.