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Table 26. Memory population rules
Processor
Configuration
Single processor
Optimizer (Independent
channel) population order
Mirror population order
Single rank sparing
population order
Multi rank sparing
population order
Fault resilient population
order
Dual processor (Start
Optimized (Independent
with processor1.
channel) population order
processor1 and
processor 2
population should
match)
Mirroring population
order
Single rank sparing
population order
Memory population
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12
{1, 2, 3, 4, 5, 6} {7, 8, 9,
10, 11, 12}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12
{1, 2, 3, 4, 5, 6} {7, 8, 9,
10, 11, 12}
A{1}, B{1},
A{2}, B{2},
A{3}, B{3},
A{4}, B{4},
A{5}, B{5},
A{6}, B{6}
A{1, 2, 3, 4, 5, 6},
B{1, 2, 3, 4, 5, 6},
A{7, 8, 9, 10, 11, 12},
B{7, 8, 9, 10, 11, 12}
A{1}, B{1},
A{2}, B{2},
A{3}, B{3},
A{4}, B{4},
A{5}, B{5},
A{6}, B{6}
Installing and removing system components
Memory population information
● DIMMs must be populated in the order
specified.
● Odd number of DIMM population is allowed
NOTE:
Odd number of DIMMs will result
in unbalanced memory configurations,
which in turn will result in performance
loss. It is recommended to populate
all memory channels identically with
identical DIMMs for best performance.
● Optimizer population order is not traditional
for 4 and 8 DIMM installations of single
processor.
○ For 4 DIMMs: A1, A2, A4, A5
○ For 8 DIMMs: A1, A2, A4, A5, A7, A8,
A10, A11
Mirroring is supported with 6 or 12 DIMMs per
processor.
● DIMMs must be populated in the order
specified.
● Requires two ranks or more per channel.
● DIMMs must be populated in the order
specified.
● Requires three ranks or more per channel.
Supported with 6 or 12 DIMMs per processor.
Odd number of DIMM population per processor
is allowed.
NOTE:
Odd number of DIMMs will result in
unbalanced memory configurations, which
in turn will result in performance loss. It
is recommended to populate all memory
channels identically with identical DIMMs
for best performance.
Optimizer population order is not traditional for
8 and 16 DIMMs installations for dual processor.
● For 8 DIMMs: A1, A2, A4, A5, B1, B2, B4, B5
● For 16 DIMMs:
A1, A2, A4, A5, A7, A8, A10, A11
B1, B2, B4, B5, B7, B8, B10, B11
Mirroring is supported with 6 or 12 DIMMs per
processor.
● DIMMs must be populated in the order
specified.
● Requires two ranks or more per channel.
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