Dell PowerEdge R815 Hardware Owner's Manual - Page 94

Rdimm, A1, A2, A3, A4, B1, B2, B3, B4, A5, A6, A7, A8, B5, B6, B7, B8, And 4

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To support memory sparing, all eight DIMM sockets of each CPU must be populated. When enabled, memory sparing allocates and reserves one rank of memory from the installed DIMMs and is large enough to act as spare memory in the event of a memory rank failure where the contents of the failed rank is copied to the spared rank. Table 3-2. Memory Configurations (Two Processors) NOTE: DIMMs A1-A8 are assigned to processor 1, DIMMs B1-B8 are assigned to processor 2, and so on. Processors System Capacity (in GB) Number of DIMMs DIMM Size (in GB) DIMM Type Organization 1 2 8 81 RDIMM x8 A1,A2,A3,A4 B1,B2, B3,B4 16 8 2 UDIMM x8 A1,A2,A3,A4 B1,B2, B3,B4 16 8 2 RDIMM x8 A1,A2,A3,A4 B1,B2, B3,B4 32 16 2 UDIMM x8 A1,A2,A3,A4,A5,A6, B1,B2,B3,B4,B5,B6, A7,A8 B7,B8 32 16 2 RDIMM x8 A1, A2, A3, A4, A5,A6,A7,A8 B1,B2,B3,B4,B5,B6, B7,B8 64 16 4 RDIMM x4 96a 16 8 and 4 RDIMM x4 A1,A2,A3,A4,A5,A6, B1,B2,B3,B4,B5,B6, A7,A8 B7,B8 A1,A2,A3,A4,A5,A6, B1,B2,B3,B4,B5,B6, A7,A8 B7,B8 128 16 8 RDIMM x4 A1,A2,A3,A4,A5,A6, B1,B2,B3,B4,B5,B6, A7,A8 B7,B8 a. Eight 8 GB DIMMS are populated in slots A1-A8 and eight 4 GB DIMMS are populated in slots B1-B8. 94 Installing System Components

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94
Installing System Components
To support memory sparing, all eight DIMM sockets of each CPU must be
populated. When enabled, memory sparing allocates and reserves one rank of
memory from the installed DIMMs and is large enough to act as spare
memory in the event of a memory rank failure where the contents of the
failed rank is copied to the spared rank.
Table 3-2.
Memory Configurations (Two Processors)
NOTE:
DIMMs A1–A8 are assigned to processor 1, DIMMs B1–B8 are assigned to
processor 2, and so on.
System Capacity
(in GB)
Number of DIMMs
DIMM Size (in GB)
DIMM Type
Organization
Processors
1
2
8
8
1
RDIMM
x8
A1,A2,A3,A4
B1,B2, B3,B4
16
8
2
UDIMM
x8
A1,A2,A3,A4
B1,B2, B3,B4
16
8
2
RDIMM
x8
A1,A2,A3,A4
B1,B2, B3,B4
32
16
2
UDIMM
x8
A1,A2,A3,A4,A5,A6,
A7,A8
B1,B2,B3,B4,B5,B6,
B7,B8
32
16
2
RDIMM
x8
A1, A2, A3, A4,
A5,A6,A7,A8
B1,B2,B3,B4,B5,B6,
B7,B8
64
16
4
RDIMM
x4
A1,A2,A3,A4,A5,A6,
A7,A8
B1,B2,B3,B4,B5,B6,
B7,B8
96
a
16
8 and 4
RDIMM
x4
A1,A2,A3,A4,A5,A6,
A7,A8
B1,B2,B3,B4,B5,B6,
B7,B8
128
16
8
RDIMM
x4
A1,A2,A3,A4,A5,A6,
A7,A8
B1,B2,B3,B4,B5,B6,
B7,B8
a. Eight 8 GB DIMMS are populated in slots A1–A8 and eight 4 GB DIMMS are populated in slots
B1–B8.