Dell EMC PowerEdge MX740c - Mode-Specific Guidelines

Conguration Description Memory population rules
RDIMMs NVDIMM-N
Conguration 9 20x 32 GB RDIMMs, 4x
NVDIMM-Ns
Processor1 {A1, 2, 3, 4, 5, 6, 7, 8,
9, 10}
Processor2 {B1, 2, 3, 4, 5, 6, 7, 8,
9, 10}
Processor1 {A11, 12}
Processor2 {B11, 12}
Conguration 10 12x 16 GB RDIMMs, 6x
NVDIMM-Ns
Same for all 12x RDIMM
congurations. See
Conguration 1.
Processor1 {A7, 8, 9}
Processor2 {B7, 8, 9}
Conguration 11 12x 32 GB RDIMMs, 6x
NVDIMM-Ns
Same for all 12x RDIMM
congurations. See
Conguration 1.
Processor1 {A7, 8, 9}
Processor2 {B7, 8, 9}
Conguration 12 18x 32 GB RDIMMs, 6x
NVDIMM-Ns
Processor1 {1, 2, 3, 4, 5, 6, 7, 8,
9}
Processor2 {1, 2, 3, 4, 5, 6, 7, 8,
9}
Processor1 {A10, 11, 12}
Processor2 {B10, 11, 12}
Conguration 13 12x 16 GB RDIMMs, 12x
NVDIMM-Ns
Same for all 12x RDIMM
congurations. See
Conguration 1.
Processor1 {A7, 8, 9, 10, 11, 12}
Processor2 {B7, 8, 9, 10, 11, 12}
Conguration 14 12x 32 GB RDIMMs, 12x
NVDIMM-Ns
Same for all 12x RDIMM
congurations. See
Conguration 1.
Processor1 {A7, 8, 9, 10, 11, 12}
Processor2 {B7, 8, 9, 10, 11, 12}
Mode-specic guidelines
The congurations allowed depend on the memory mode selected in the System BIOS.
Table 9. Memory operating modes
Memory Operating Mode Description
Optimizer Mode The Optimizer Mode if enabled, the DRAM controllers operate
independently in the 64-bit mode and provide optimized memory
performance.
Mirror Mode The Mirror Mode if enabled, the system maintains two identical
copies of data in memory, and the total available system memory is
one half of the total installed physical memory. Half of the installed
memory is used to mirror the active memory modules. This feature
provides maximum reliability and enables the system to continue
running even during a catastrophic memory failure by switching
over to the mirrored copy. The installation guidelines to enable
Mirror Mode require that the memory modules be identical in size,
speed, and technology, and they must be populated in sets of 6 per
processor.
Single Rank Spare Mode Single Rank Spare Mode allocates one rank per channel as a spare.
If excessive correctable errors occur in a rank or channel, while the
operating system is running, they are moved to the spare area to
74 Installing and removing system components