Dell PowerEdge R840 EMC Installation and Service Manual - Page 79

Removing a memory module

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Table 15. Memory population rules (continued) Processor Configuration Memory population Mirroring population order 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} Single rank sparing population order 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} Multi rank spare population order 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} Fault resilient population order 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} Memory population information Optimizer population order is not traditional for 16 and 32 DIMMs installations for dual processor. • 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 Mirroring is supported with 6 or 12 DIMM slots 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 DIMM slots per processor. Removing a memory module Prerequisites 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. CAUTION: To ensure proper system cooling, when processor 1 and processor 2 are installed, memory module blanks must be installed in memory sockets that are not occupied. Remove memory module blanks only if you intend to install memory modules in those sockets. 1. Follow the safety guidelines listed in Safety instructions on page 44. 2. Follow the procedure listed in Before working inside your system on page 45. 3. Remove the applicable air shroud: • Non-GPU air shroud Installing and removing system components 79

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Table 15. Memory population rules (continued)
Processor
Configuration
Memory population
Memory population information
Optimizer population order is not traditional for 16
and 32 DIMMs installations for dual processor.
•
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
Mirroring population order
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}
Mirroring is supported with 6 or 12 DIMM slots per
processor.
Single rank sparing
population order
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}
•
DIMMs must be populated in the order
specified.
•
Requires two ranks or more per channel.
Multi rank spare population
order
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}
•
DIMMs must be populated in the order
specified.
•
Requires three ranks or more per channel.
Fault resilient population
order
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}
Supported with 6 or 12 DIMM slots per processor.
Removing a memory module
Prerequisites
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.
CAUTION:
To ensure proper system cooling, when processor 1 and processor 2 are installed, memory module blanks
must be installed in memory sockets that are not occupied. Remove memory module blanks only if you intend to install
memory modules in those sockets.
1.
Follow the safety guidelines listed in
Safety instructions
on page 44.
2.
Follow the procedure listed in
Before working inside your system
on page 45.
3.
Remove the applicable air shroud:
•
Non-GPU air shroud
Installing and removing system components
79