Dell PowerEdge R640 EMC PowerEdge R640 Installation and Service Manual - Page 98

Table 55. Memory population rules continued, Odd number of DIMMs will result

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Table 55. Memory population rules (continued) Processor Configuration Memory population Memory population information 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 Mirror population order Single rank sparing population order {1, 2, 3, 4, 5, 6} {7, 8, 9, 10, Mirroring is supported with 6 or 12 DIMMs per 11, 12} processor. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, • 12 • DIMMs must be populated in the order specified. Requires two ranks or more per channel. Multi rank sparing population order Fault resilient population order Dual processor (Start with processor1. processor1 and processor 2 population should match) Optimized (Independent channel) population order Mirroring population order 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, • 12 • DIMMs must be populated in the order specified. Requires three ranks or more per channel. {1, 2, 3, 4, 5, 6} {7, 8, 9, 10, Supported with 6 or 12 DIMMs per processor. 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} 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 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} Mirroring is supported with 6 or 12 DIMMs per processor. Single rank sparing population order A{1}, B{1}, A{2}, B{2}, A{3}, B{3}, A{4}, B{4}, A{5}, B{5}, A{6}, B{6} • DIMMs must be populated in the order specified. • Requires two ranks or more per channel. Multi rank sparing population order A{1}, B{1}, A{2}, B{2}, A{3}, B{3}, • DIMMs must be populated in the order specified. • Requires three ranks or more per channel. 98 Installing and removing system components

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Table 55. Memory population rules (continued)
Processor
Configuration
Memory population
Memory population information
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
Mirror population order
{1, 2, 3, 4, 5, 6} {7, 8, 9, 10,
11, 12}
Mirroring is supported with 6 or 12 DIMMs per
processor.
Single rank sparing
population order
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12
•
DIMMs must be populated in the order
specified.
•
Requires two ranks or more per channel.
Multi rank sparing
population order
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12
•
DIMMs must be populated in the order
specified.
•
Requires three ranks or more per channel.
Fault resilient population
order
{1, 2, 3, 4, 5, 6} {7, 8, 9, 10,
11, 12}
Supported with 6 or 12 DIMMs per processor.
Dual processor (Start
with processor1.
processor1 and
processor 2 population
should match)
Optimized (Independent
channel) population order
A{1}, B{1},
A{2}, B{2},
A{3}, B{3},
A{4}, B{4},
A{5}, B{5},
A{6}, B{6}
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 population order
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}
Mirroring is supported with 6 or 12 DIMMs per
processor.
Single rank sparing
population order
A{1}, B{1},
A{2}, B{2},
A{3}, B{3},
A{4}, B{4},
A{5}, B{5},
A{6}, B{6}
•
DIMMs must be populated in the order
specified.
•
Requires two ranks or more per channel.
Multi rank sparing
population order
A{1}, B{1},
A{2}, B{2},
A{3}, B{3},
•
DIMMs must be populated in the order
specified.
•
Requires three ranks or more per channel.
98
Installing and removing system components