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Whitepaper – Balanced Memory with 2nd Generation Intel® Xeon Scalable Processors
© 2019 Dell Inc. or its subsidiaries.
Internal Use - Confidential
6. Near Balanced Configurations
Near balanced configurations also only have one interleave set. Populating DIMMs
one, two and three on the same channel column will naturally only create one
interleave set, but once four or more DIMMs are introduced, guideline 4.2 must be
satisfied to maintain a near balanced composure. Mirrored columns must be identically
populated with the same DIMMs. The four and eight DIMM illustrations below
demonstrate what this looks like. Regardless, near balanced configurations are not
fully populating memory channels with one or two DIMMs, and therefore can reduce
memory bandwidth by up to 33% from its maximum potential. Dell EMC does not
recommend populating memory in a near balanced configuration.
Figure 9: This configuration has one interleave set because one memory module only requires one
interleave set. The absence of all channels being populated makes this configuration near balanced.