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Replacing and adding hardware
Table 32 Memory channels (continued)
Processor
Channel 0
Processor 2
Slots B1 and
B7
Processor 3
Slots C1 and
C7
Processor 4
Slots D1 and
D7
General memory module installation guidelines
To ensure optimal performance of your system, observe the following general guidelines when
configuring your system memory. If your system's memory configurations fail to observe these
guidelines, your system might not boot, stop responding during memory configuration, or operate
with reduced memory.
The memory bus may operate at frequency can be 2933 MT/s, 2666 MT/s, 2400 MT/s, or 2133
MT/s depending on the following factors:
l
l
l
The system supports Flexible Memory Configuration, enabling the system to be configured and run
in any valid chipset architectural configuration. The following are the recommended guidelines for
installing memory modules:
l
l
l
l
l
l
l
DIMM population update for Performance Optimized mode with quantity of 4 and 8 DIMMs per
processor.
l
l
Dell EMC VxRail Appliances on Dell PowerEdge Servers VxRail P580N Owner's Manual
42
Channel 1
Channel 2
Slots B2 and
Slots B3 and
B8
B9
Slots C2 and
Slots C3 and
C8
C9
Slots D2 and
Slots D3 and
D8
D9
System profile selected (for example, Performance Optimized, or Custom [can be run at high
speed or lower]).
Maximum supported DIMM speed of the processors. For memory frequency of 2933 MT/s,
one DIMM per channel is supported.
Maximum supported speed of the DIMMs.
Note:
MT/s indicates DIMM speed in MegaTransfers per second.
All DIMMs must be DDR4.
A maximum of two different ranked DIMMs can be populated in a channel regardless of rank
count.
If memory modules with different speeds are installed, they will operate at the speed of the
slowest installed memory module(s).
Populate memory module sockets only if a processor is installed.
For quad-processor systems, sockets A1 to A12, sockets B1 to B12, sockets C1 to C12, and
n
sockets D1 to D12 are available.
Populate all the sockets with white release tabs first, followed by the black release tabs.
Mixing of more than two memory module capacities in a system is not supported.
Unbalanced memory configurations will result in a performance loss so always populate
memory channels identically with identical DIMMs for best performance.
When the DIMM quantity is 4 per processor, the population is slot 1, 2, 4, 5.
When the DIMM quantity is 8 per processor, the population is slot 1, 2, 4, 5, 7, 8, 10, 11.
Channel 3
Channel 4
Slots B4 and
Slots B5 and
B10
B11
Slots C4 and
Slots C5 and
C10
C11
Slots D4 and
Slots D5 and
D10
D11
Channel 5
Slots B6 and
B12
Slots C6 and
C12
Slots D6 and
D12
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