Dell PowerEdge R420 Systems Owner's Manual

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Sample Memory Configurations

The following tables show sample memory 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	Organization and Speed	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, A2
10	2	5	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, A2, A3, A4, A5
12	4	3	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, A2, A3
20	4	5	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, A2, A3, A4, A5
24	8	3	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3
32	8	4	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, A4
48	16	3	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3
96	16	6	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, A4, A5, A6
128	32	4	4R x4, 1066 MT/s	A1, A2, A3, A4
192	32	6	4R x4, 1066 MT/s	A1, A2, A3, A4, A5, A6

Table 2. Memory Configurations — Two Processors
System Capacity (in GB)	DIMM Size (in GB)	Number of DIMMs	Organization and Speed	DIMM Slot Population
4	2	2	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, B1
8	2	4	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, A2, B1, B2
12	2	6	1R x8, 1333 MT/s 1R x8, 1600 MT/s	A1, A2, A3, B1, B2, B3
24	4	6	2R x8, 1333 MT/s 2R x8, 1600 MT/s	A1, A2, A3, B1, B2, B3
48	8	6	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, B1, B2, B3
96	16	6	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, B1, B2, B3
128	16	8	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, A4, B1, B2, B3, B4
160	16	10	2R x4, 1333 MT/s 2R x4, 1600 MT/s	A1, A2, A3, A4, A5, B1, B2, B3, B4, B5
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	32	8	4R x4, 1066 MT/s	A1, A2, A3, A4, B1, B2, B3, B4
384	32	12	4R x4, 1066 MT/s	A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6