Removing A Memory Module - Dell EMC PowerEdge R940xa Installation And Service Manual

Processor Configuration
Mirroring population order
Single rank sparing
population order
Multi rank spare population
order
Fault resilient population
order

Removing a memory module

The procedure for removing a DIMM module and an NVDIMM-N module is identical.
Prerequisites
1. Follow the safety guidelines listed in
2. Follow the procedure listed in
CAUTION: To prevent data loss and potential damage to your system, ensure that your system, LEDs on system,
LEDs on NVDIMM-N and LEDs on NVDIMM-N battery are turned off before removing the NVDIMM-N battery.
3. Remove the support bar.
4. Remove the air shrouds.
WARNING: Allow the memory modules to cool after you power off the system. Handle the memory modules by the card
edges and avoid touching the components or metallic contacts on the memory module.
96 Installing and removing system components
Memory population
A{1, 2, 3, 4, 5, 6},
B{1, 2, 3, 4, 5, 6},
C{1, 2, 3, 4, 5, 6},
D{1, 2, 3, 4, 5, 6}
A{7, 8, 9, 10, 11, 12},
B{7, 8, 9, 10, 11, 12},
C{7, 8, 9, 10, 11, 12},
D{7, 8, 9, 10, 11, 12}
A{1}, B{1}, C{1}, D{1},
A{2}, B{2}, C{2}, D{2},
A{3}, B{3}, C{3}, D{3},
A{4}, B{4}, C{4}, D{4}
A{1}, B{1}, C{1}, D{1},
A{2}, B{2}, C{2}, D{2},
A{3}, B{3}, C{3}, D{3},
A{4}, B{4}, C{4}, D{4}
A{1, 2, 3, 4, 5, 6},
B{1, 2, 3, 4, 5, 6},
C{1, 2, 3, 4, 5, 6},
D{1, 2, 3, 4, 5, 6}
A{7, 8, 9, 10, 11, 12},
B{7, 8, 9, 10, 11, 12},
C{7, 8, 9, 10, 11, 12},
D{7, 8, 9, 10, 11, 12}
Safety instructions.
Before working inside your
Memory population information
Optimizer population order is not traditional for 16
and 32 DIMMs installations for dual processor.
•
•
Mirroring is supported with 6 or 12 DIMM slots per
processor.
•
•
•
•
Supported with 6 or 12 DIMM slots per processor.
system.
NOTE: For best performance, 6 DIMMs or
12 DIMMs per processor is recommended.
For 16 DIMMs:
A1, A2, A4, A5, B1, B2, B4, B5,
C1, C2, C4, C5, D1, D2, D4, D5
For 32 DIMMs:
A1, A2, A4, A5, A7, A8, A10, A11,
B1, B2, B4, B5, B7, B8, B10, B11
C1, C2, C4, C5, C7, C8, C10, C11
D1, D2, D4, D5, D7, D8, D10, D11
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.