Dell EMC XC640 Series Installation And Service Manual page 70

Table 38. Memory population rules (continued)
Processor Configuration
population should Mirroring population order
match)
Single rank sparing population
order
Multi rank spare population
order
Fault resilient population order
Table 39. Memory population rules
Processor Configuration
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
Multi rank sparing
population order
Fault resilient population
order
70 Installing and removing system components
Memory population
A{1,2,3,4,5,6},
B{1,2,3,4,5,6}
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}...
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}...
A{1,2,3,4,5,6},
B{1,2,3,4,5,6}
Memory population
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}
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}
Memory population information
Mirroring is supported with 6
DIMMs per processor.
Populate in this order, odd amount
per processor allowed. Requires
two ranks or more per channel.
Populate in this order, odd amount
per processor allowed. Requires
three ranks or more per channel.
Supported with 6 DIMMs per
processor.
Memory population information
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.
● DIMMs must be populated in the order
specified.
● Requires three ranks or more per channel.
Supported with 6 or 12 DIMMs per processor.