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is used to mirror the active memory modules. In the event of an uncorrectable error, the system switches
over to the mirrored copy. This ensures SDDC and multi-bit protection.
The installation guidelines for memory modules are as follows
• Memory modules must be identical in size, speed, and technology.
• Memory modules installed in memory module sockets with white release levers must be identical and
the same rule applies for sockets with black and green release tabs. This ensures that identical
memory modules are installed in matched pairs—for example, A1 with A2, A3 with A4, A5 with A6, and
so on.
Sample memory configurations
The following tables show sample memory configurations for one and two processor configurations that
follow the appropriate memory guidelines.
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
4 4 1
1R, x8, 2133 MT/s,
1R, x8, 1866 MT/s
A1
8 4 2
1R, x8, 2133 MT/s,
1R, x8, 1866 MT/s
A1, A2
16 4 4
1R, x8, 2133 MT/s,
1R, x8, 1866 MT/s
A1, A2, A3, A4
8 2
2R, x8, 2133 MT/s,
2R, x8, 1866 MT/s
A1, A2
24 4 6
1R, x8, 2133 MT/s,
1R, x8, 1866 MT/s
A1, A2, A3, A4, A5, A6
48 4 12
1R, x8, 1866 MT/s
1R, x8, 1600 MT/s
A1, A2, A3, A4, A5, A6, A7, A8, A9,
A10, A11, A12
8 6
2R, x8, 2133 MT/s,
2R, x8, 1866 MT/s
A1, A2, A3, A4, A5, A6
96 8 12
2R, x8, 1866 MT/s
2R, x8 1600 MT/s
A1, A2, A3, A4, A5, A6, A7, A8, A9,
A10, A11, A12
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