Dell R420xr owner manual MT/s A1, B1 1600 MT/s 1333 A1, A2, B1, B2

Table 1. Memory Configurations — Single Processor

System	DIMM Size (in	Number of	Organization and	DIMM Slot Population
Capacity (in GB)	GB)	DIMMs	Speed
2	2	1	1R x8, 1333 MT/s	A1
			1R x8, 1600 MT/s
4	2	2	1R x8, 1333 MT/s	A1, A2
			1R x8, 1600 MT/s
10	2	5	1R x8, 1333 MT/s	A1, A2, A3, A4, A5
			1R x8, 1600 MT/s
12	4	3	1R x8, 1333 MT/s	A1, A2, A3
			1R x8, 1600 MT/s
20	4	5	1R x8, 1333 MT/s	A1, A2, A3, A4, A5
			1R x8, 1600 MT/s
24	8	3	2R x4, 1333 MT/s	A1, A2, A3
			2R x4, 1600 MT/s
32	8	4	2R x4, 1333 MT/s	A1, A2, A3, A4
			2R x4, 1600 MT/s
48	16	3	2R x4, 1333 MT/s	A1, A2, A3
			2R x4, 1600 MT/s
96	16	6	2R x4, 1333 MT/s	A1, A2, A3, A4, A5, A6
			2R x4, 1600 MT/s
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	DIMM Size (in	Number of	Organization and			DIMM Slot Population
(in GB)	GB)	DIMMs	Speed
4	2	2	1R x8, 1333		MT/s	A1, B1
			1R x8,	1600 MT/s
8	2	4	1R x8,	1333	MT/s	A1, A2, B1, B2

43