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DRAM Installation order

Memory modules must be installed in a specific order based on the memory configuration that you implement on your node.

The following memory configurations are available:

Independent memory mode population sequence
Memory mirroring population sequence
Memory rank sparing population sequence

DRAM DIMM installation order

Note

When adding one or more DIMMs during a memory upgrade, you might need to remove some DIMMs that are already installed to new locations.

Table 1. DRAM DIMM population sequence - Independent memory mode
Independent memory mode population sequence
Note √: It represents RDIMMs, 3DS RDIMMs or LRDIMMs can be installed on the corresponding DIMM slots.
Total DIMMs	Processor 1										Processor 2
	DIMM slot										DIMM slot
	8	7	6	5		4	3	2	1		16	15	14	13		12	11	10	9
2						√										√
4				√		√								√		√
6				√		√			√					√		√			√
8	√			√		√			√		√			√		√			√
10	√			√		√		√	√		√			√		√		√	√
12	√	√		√		√		√	√		√	√		√		√		√	√

Table 2. DRAM DIMM population sequence - Memory mirroring mode
Memory mirroring population sequence
Note √: It represents RDIMMs, 3DS RDIMMs or LRDIMMs can be installed on the corresponding DIMM slots.
Total DIMMs	Processor 1										Processor 2
Total DIMMs	DIMM slot										DIMM slot
DIMMs	8	7	6	5		4	3	2	1		16	15	14	13		12	11	10	9
8	√			√		√			√		√			√		√			√
10	√			√		√		√	√		√			√		√		√	√
12	√	√		√		√		√	√		√	√		√		√		√	√

Table 3. DRAM DIMM population sequence - Memory rank sparing mode
Memory rank sparing population sequence
Note √: It represents RDIMMs, 3DS RDIMMs or LRDIMMs can be installed on the corresponding DIMM slots.
Total DIMMs	Processor 1										Processor 2
	DIMM slot										DIMM slot
	8	7	6	5		4	3	2	1		16	15	14	13		12	11	10	9
2						√										√
4				√		√								√		√
6				√		√			√					√		√			√
8	√			√		√			√		√			√		√			√
10	√			√		√		√	√		√			√		√		√	√
12	√	√		√		√		√	√		√	√		√		√		√	√

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DRAM DIMM installation order