IBM System x3650 Type 7979 User Manual

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DIMM 1

DIMM 2

DIMM 3

DIMM 4

DIMM 5

DIMM 6

DIMM 7

DIMM 8

DIMM 9

Channel 0

Channel 1

Channel 2

DIMM 10

DIMM 11

DIMM 12

Channel 3

Branch 1

Branch 0

v When you use memory mirroring, you must install two pairs of DIMMs at a time.

The four DIMMs in each group must be identical. See Table 8 for the DIMM

connectors that are in each group.

Table 8. Memory mirroring DIMM installation sequence

Group DIMM connectors

1 1, 4, 7, and 10

2 2, 5, 8, and 11

3 3, 6, 9, and 12

Table 9. Memory mirroring DIMM functions

Group Active DIMMs Mirroring DIMMs

1 1, 4 7, 10

2 2, 5 8, 11

3 3, 6 9, 12

v Three online-spare memory configurations are supported. The online-spare

DIMM pairs must be the same speed, type, and the same size as, or larger than,

the largest active DIMM pairs. See Table 10 on page 116 for the online-spare

DIMM connector assignments.

Chapter 4. Removing and replacing server components 115

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