Independent memory mode installation order

Independent memory mode provides the highest level of memory performance, but lacks failover protection. The DIMM installation order for independent memory mode varies based on the number of processors and memory modules installed in the server.

Follow the rules below when installing memory modules in independent mode:

There should be at least one DDR5 DIMM per processor.
All DDR5 memory modules must operate at the same speed in the same system.
Memory population must be identical between processors.
Memory modules from different vendors are supported.
In each memory channel, populate the slot farthest from the processor (slot 0) first.
All memory modules must be DDR5 memory modules.
Mixing 16Gbit (16 GB, 32 GB), 24Gbit (96 GB), and 32Gbit-based (128 GB) memory module is not allowed in a system.
96 GB memory module must be identically populated in the system.
96 GB memory module can only support 1DPC (8 DIMMs per processor) and 2DPC (16 DIMMs per processor) configurations.
All memory modules to be installed must be of the same type.
- Value RDIMM cannot be mixed with non-value RDIMMs in a system.
- 3DS RDIMM cannot be mixed with non-3DS RDIMMs in a system.
All memory modules in a system must have the same number of ranks.
Before installing 24Gbit-based (96 GB) or 32Gbit-based (128 GB) memory module to the system, make sure to update the UEFI firmware to the latest version first, then remove all existing 16Gbit-based (16 GB, 32 GB) memory modules.

Table 1. Independent mode
Total DIMMs	Processor 0/1/4/5
Total DIMMs	D1	D2	C1	C2	B1	B2	A1	A2	E2	E1	F2	F1	G2	G1	H2	H1
8 DIMMs							A1
16 DIMMs¹							A1							G1
32 DIMMs¹			C1				A1			E1				G1
48 DIMMs¹	D1		C1				A1			E1		F1		G1
64 DIMMs^1,2	D1		C1		B1		A1			E1		F1		G1		H1
96 DIMMs¹	D1		C1	C2	B1		A1	A2	E2	E1		F1	G2	G1		H1
128 DIMMs^1,2	D1	D2	C1	C2	B1	B2	A1	A2	E2	E1	F2	F1	G2	G1	H2	H1
Total DIMMs	Processor 2/3/6/7
Total DIMMs	M1	M2	L1	L2	K1	K2	J1	J2	N2	N1	P2	P1	R2	R1	T2	T1
8 DIMMs							J1
16 DIMMs¹							J1							R1
32 DIMMs¹			L1				J1			N1				R1
48 DIMMs¹	M1		L1				J1			N1		P1		R1
64 DIMMs^1,2	M1		L1		K1		J1			N1		P1		R1		T1
96 DIMMs¹	M1		L1	L2	K1		J1	J2	N2	N1		P1	R2	R1		T1
128 DIMMs^1,2	M1	M2	L1	L2	K1	K2	J1	J2	N2	N1	P2	P1	R2	R1	T2	T1

Note

DIMM configurations that support the Sub NUMA Clustering (SNC) feature, which can be enabled via UEFI. SNC is not supported if DIMM population does not follow the sequence indicated by the table above.
DIMM configurations that support Software Guard Extensions (SGX), see Enable Software Guard Extensions (SGX) to enable this feature.

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