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Huawei FusionServer Pro CH225 V5 Compute Node
Technical White Paper
●
Table 5-3 DDR4 memory specifications
Parameter
Maximum capacity per
DDR4 DIMM (GB)
Rated speed (MT/s)
Rank
Operating voltage (V)
Maximum number of
DDR4 DIMMs in a node
Maximum DDR4
memory capacity of the
node (GB)
Maximum
operating
speed
(MT/s)
● a: The maximum number of DDR4 DIMMs is based on dual-processor
● b: The maximum DDR4 memory capacity varies depending on the processor
● c: DPC (DIMM per channel) indicates the number of DIMMs per channel.
● d: If the Cascade Lake processor is used, the maximum operating speed of a
Issue 06 (2020-07-31)
DDR4 DIMMs of different specifications (capacity, bit width, rank, and height)
can be used together for capacity expansion purposes. However, the memory
Reliability, Availability, and Serviceability (RAS) features may be affected.
Observe the following rules when you need to use different types of DIMMs
in a compute node:
–
RDIMMs and LRDIMMs cannot be used together.
–
Do not use 128 GB DIMMs together with DIMMs of other capacities.
–
If DIMMs with different rank quantities need to be installed in the same
channel, install the DIMMs with more ranks in slots farther away from
the CPU.
For example, install the dual-rank DIMM in slot 1A1 and the single-rank
DIMM in slot 1A2.
–
Memory modules of different speeds can be mixed in any way. However,
the memory speed is the lowest speed of the DIMMs configured.
–
RAS features, such as memory mirroring, single device data correction
(SDDC), SDDC+1, and double device data correction (DDDC), are not
supported if x4 and x8 DIMMs are used together.
b
c
1DPC
2DPC
configuration.
type. The value listed in this table is based on the assumption that DIMMs
are fully configured.
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.
Copyright © Huawei Technologies Co., Ltd.
Specifications
384
768
2933
2933
Single rank
Dual rank
1.2
1.2
24
24
a
16
32
d
2933
2933
2666
2666
5 Hardware Description
1536
2666
Quad rank
1.2
24
64
2666
d
2666
3072
2666
Octal rank
1.2
24
128
2666
2666
18
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