Dimm Ranks - Huawei 2288H V5 User Manual

2288H V5 Server
User Guide
Figure 5-50 DIMM installation rules (one CPU)
Figure 5-51 DIMM installation rules (two CPUs)

5.13.3 DIMM Ranks

Understanding single-rank, dual-rank, and quad-rank DIMMs is helpful for correctly
configuring memory protection modes. Some DIMM configuration requirements are based on
these classifications.
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Issue 04 (2018-09-04)
A single-rank DIMM has one set of memory chips that are accessed while data is written
to or read from the memory.
A dual-rank DIMM has two single-rank DIMMs on the same module, and only one rank
is accessible at a time.
A quad-rank DIMM has two dual-rank DIMMs on the same module, and only one rank
is accessible at a time.
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