Dell PowerEdge R720 and R720xd Owner's Manual

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Sample memory configurations

The following tables show sample memory configurations for one and two processor configurations that follow the appropriate memory guidelines stated in this section.

NOTE: 16 GB quad-rank RDIMMs are not supported.

NOTE: 1R, 2R and 4R in the following tables indicate single-, dual-, and quad-rank DIMMs respectively.

Table 1. Memory configurations—single processor
System Capacity (in GB)	DIMM Size (in GB)	Number of DIMMs	DIMM Rank, Organization, and Frequency	DIMM Slot Population
2	2	1	1R, x8, 1333 MT/s, 1R, x8, 1600 MT/s	A1
4	2	2	1R, x8, 1333 MT/s, 1R, x8, 1600 MT/s	A1, A3
8	2	4	1R, x8, 1333 MT/s, 1R, x8, 1600 MT/s	A1, A2, A3, A4
12	2	6	1R, x8, 1333 MT/s, 1R, x8, 1600 MT/s	A1, A2, A3, A4, A5, A6
16	2	8	1R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8
16	4	4	2R, x8, 1333 MT/s, 2R, x8, 1600 MT/s	A1, A2, A3, A4
24	2	12	1R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12
24	4	6	2R, x8, 1333 MT/s, 2R, x8, 1600 MT/s	A1, A2, A3, A4, A5, A6
48	4	12	2R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12
48	8	6	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, A5, A6
96	8	12	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12
96	16	6	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, A5, A6
128	16	8	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s,	A1, A2, A3, A4, A5, A6, A7, A8
144	16 and 8	10	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A11 NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, A5, A6, A7, and A8 and 8 GB DIMMs must be installed in slots A9 and A11.
144	16 and 8	10	2R, x4, 1333 MT/s
384	32	12	LRDIMM, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12
768	64	12	LRDIMM, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12

Table 2. Memory configurations—two processors
System Capacity (in GB)	DIMM Size (in GB)	Number of DIMMs	DIMM Rank, Organization, and Frequency	DIMM Slot Population
16	2	8	1R, x8, 1333 MT/s, 1R, x8, 1600 MT/s	A1, A2, A3, A4 B1, B2, B3, B4
32	2	16	1R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8 B1, B2, B3, B4, B5, B6, B7, B8
32	4	8	2R, x8, 1333 MT/s, 2R, x8, 1600 MT/s	A1, A2, A3, A4 B1, B2, B3, B4
64	4	16	2R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8 B1, B2, B3, B4, B5, B6, B7, B8
64	8	8	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4 B1, B2, B3, B4
96	4	24	2R, x8, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12
96	8	12	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, A5, A6 B1, B2, B3, B4, B5, B6
128	8	16	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8 B1, B2, B3, B4, B5, B6, B7, B8
128	16	8	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, B1, B2, B3, B4
160	8	20	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A11 B1, B2, B3, B4, B5, B6, B7, B8, B9, B11
160	16 and 8	12	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6 NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, B1, B2, B3, and B4 and 8 GB DIMMs must be installed in slots A5, A6, B5, and B6.
192	8	24	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12
192	16	12	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s	A1, A2, A3, A4, A5, A6 B1, B2, B3, B4, B5, B6
256	16	16	2R, x4, 1333 MT/s, 2R, x4, 1600 MT/s,	A1, A2, A3, A4, A5, A6, A7, A8 B1, B2, B3, B4, B5, B6, B7, B8
384	16	24	2R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12
384	32	12	4R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6 B1, B2, B3, B4, B5, B6
512	32	16	4R, x4, 1066 MT/s 4R, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8 B1, B2, B3, B4, B5, B6, B7, B8
768	32	24	LRDIMM, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12
1536	64	24	LRDIMM, x4, 1333 MT/s	A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12