DIMM Population Rules
The DIMM configurations depend upon the CPU configuration. A single CPU can have a maximum of 8 DIMMS. A dual-CPU configuration can have a maximum of 16 DIMMS.
When you add or remove DIMMs, follow these rules:
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The server supports 64-GB DDR4-2400 DIMMs, 32-GB DDR4-2400 DIMMs, and 16-GB DDR4-2400 DIMMs.
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4 DIMMs per CPU or 8 DIMMs per CPU.
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Do not mix DIMM sizes.
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When you add DIMMs in pairs, use DIMMs of the same part number.
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If you are mixing DIMM capacities, install the largest capacities first, then consecutively smaller capacities.
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Within a memory channel, DIMMs must be populated in the white sockets first, then in the black sockets.
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If a slot is left empty, install a DIMM filler. With the single-CPU configuration, all DIMM slots on P 1 must be populated with fillers.
Caution - Overheating hazard. There must be no empty DIMM slots. Use fillers for empty slots.