Dell EMC PowerEdge R540 - Removing a Memory Module

used to mirror the active memory modules. In the event of an uncorrectable error, the system switches over to the mirrored copy. This
ensures Single Device Data Correction (SDDC) and multi-bit protection.
The installation guidelines for memory modules are as follows:
• Memory modules must be identical in size, speed, and technology.
• Memory modules must be populated in sets of 6 per CPU to enable memory mirroring.
Table 41. Memory population rules
Processor Conguration Memory population Memory population information
Single CPU Optimizer (Independent channel)
population order
1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Populate in this order, odd amount
allowed.
Mirror population order {1, 2, 3, 4, 5, 6} Mirroring is supported with 6 DIMM
slots per CPU.
Single rank sparing population order 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Populate in this order, odd amount
allowed. Requires two ranks or more
per channel.
Multi rank sparing population order 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Populate in this order, odd amount
allowed. Requires three ranks or more
per channel.
Dual CPU (Populate
round robin starting
with CPU1)
Optimized (Independent channel)
population order
C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
C2{3}...
Odd amount of DIMM slots per CPU
allowed.
Mirroring population order C1{1, 2, 3, 4, 5, 6}, C2{1, 2, 3, 4, 5,
6}
Mirroring is supported with 6 DIMM
slots per CPU.
Single rank sparing population order C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
C2{3}...
Populate in this order, odd amount per
CPU allowed. Requires two ranks or
more per channel.
Multi rank sparing population order C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
C2{3}...
Populate in this order, odd amount per
CPU allowed. Requires three ranks or
more per channel.
Removing a memory module
Prerequisites
1 Follow the safety guidelines listed in Safety instructions.
2 Follow the procedure listed in Before working inside your system.
3 If applicable, remove the air shroud.
WARNING
: Allow the memory modules to cool after you power o the system. Handle the memory modules by the card edges
and avoid touching the components or metallic contacts on the memory module.
Steps
1 Locate the appropriate memory module socket.
CAUTION
: Handle each memory module only by the card edges, ensuring not to touch the middle of the memory
module or metallic contacts.
2 Push the ejectors outward on both ends of the memory module socket to release the memory module from the socket.
3 Lift and remove the memory module from the system.
Installing and removing system components
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