callout Description Definition
1 Capacity of the memory module.
l 8 GB
l 16 GB
l 32 GB
l 64 GB
l 128 GB
2 Number of ranks of the memory
module.
l 1R: single-rank
l 2R: dual-rank
l 4R: quad-rank
l 8R: octal-rank
3 Data width on the DRAM.
l X4: 4-bit
l X8: 8-bit
4 Type of the memory interface.
l PC3: DDR3
l PC4: DDR4
5 Maximum memory speed.
l 2133 MT/S
l 2400 MT/S
l 2666 MT/S
l 2933 MT/S
6 Column Access Strobe (CAS)
latency.
l P: 15
l T: 17
7 DIMM type.
l R: RDIMM
l L: LRDIMM
2.3.2 Memory Subsystem Architecture
The CH121 V5 provides 24 memory slots. Each processor integrates six memory channels.
Install the memory modules in the primary memory channels first. If the primary memory
channel is not populated, the memory modules in secondary memory channels cannot be used.
Table 2-2 Memory channels
CPU
Memory Channel Memory Slot
CPU 1 1A (primary) DIMM000(1A1)
1A DIMM001(1A2)
1B (primary) DIMM010(1B1)
1B DIMM011(1B2)
FusionServer Pro CH121 V5 Compute Node
User Guide
2 Hardware Description
Issue 06 (2019-08-10) Copyright © Huawei Technologies Co., Ltd. 11
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