Huawei FusionServer Pro CH121 V5 User Manual page 22

FusionServer Pro CH121 V5 Compute Node
User Guide
Table 2-3 DDR4 memory specifications
Parameter
Rank
Rated speed (MT/s)
Operating voltage (V)
Maximum number of DDR4
memory modules in a node
Maximum capacity per
DDR4 memory module
(GB)
Maximum DDR4 memory
capacity of the node (GB)
Maximum
operating
speed
(MT/s)
Issue 06 (2019-08-10)
Observe the following rules when you need to use different types of memory modules in
a compute node:
– RDIMMs and LRDIMMs cannot be used together.
– Do not use 128 GB memory modules together with memory modules of other
capacities.
– If memory modules with different rank quantities need to be installed in the same
channel, install the memory modules with more ranks in slots farther away from the
CPU.
For example, install the dual-rank memory module in slot 1A1 and the single-rank
memory module in slot 1A2.
– Memory modules of different speeds can be mixed in any way. However, the
memory speed is the lowest speed of the memory modules 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 memory modules are used together.
One DDR4
memory
module per
channel
Two DDR4
memory
modules per
channel
Copyright © Huawei Technologies Co., Ltd.
Specifications
Single rank Dual rank
a
2933 2933
1.2 1.2
24 24
b
16 32
384 768
a
2933 2933
2666 2666
2 Hardware Description
Quad rank
2666
a
1.2
24
64
1536
2666
a
2666
Octal rank
2666
1.2
c
24
128
c
3072
2666
2666
14