Dell EMC Storage NX3340 Installation And Service Manual page 71

Optimizer Mode
This mode supports Single Device Data Correction (SDDC) only for memory modules that use x4 device width. It does not impose any
specific slot population requirements.
• Dual processor: Populate the slots in round robin sequence starting with processor 1.
NOTE: Processor 1 and processor 2 population should match.
Table 14. 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)
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}
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.
Installing and removing system components 71