Removing A Memory Module - Dell EMC PowerEdge R740 Installation And Service Manual

Table 41. Memory population rules
Processor Configuration
Single CPU Optimizer (Independent channel)
population order
Mirror population order
Single rank spare population order
Multi rank spare population order
Fault resilient population order
Dual CPU (Starting with Optimized (Independent channel)
CPU1, CPU1 and CPU2 population order
population should
Mirroring population order
match)
Single rank sparing population order C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
Multi rank spare population order
Fault resilient population order

Removing a memory module

The procedure for removing a memory module and NVDIMM-N 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 If applicable, remove the air shroud.
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.
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.
94 Dell EMC PowerEdge R740 Installation and Service Manual
Installing and removing system components
Safety instructions.
Before working inside your
Memory population
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
{1, 2, 3, 4, 5, 6}, {7, 8, 9, 10, 11, 12} Mirroring is supported with 6 or 12
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
{1, 2, 3, 4, 5, 6}, {7, 8, 9, 10, 11, 12} Supported with 6 or 12 DIMMs per
C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
C2{3}...
C1{1, 2, 3, 4, 5, 6}, C2{1, 2, 3, 4, 5,
6}, C1{7, 8, 9, 10, 11, 12}, C2{7, 8,
9, 10, 11, 12}
C2{3}...
C1{1}, C2{1}, C1{2}, C2{2}, C1{3},
C2{3}, C1{4}, C2{4}, C1{5},
C2{5}...
C1{1, 2, 3, 4, 5, 6}, C2{1, 2, 3, 4, 5,
6}, C1{7, 8, 9, 10, 11, 12}, C2{7, 8,
9, 10, 11, 12}
system.
Memory population information
Populate in this order, odd amount
allowed.
DIMMs per CPU.
Populate in this order, odd amount
allowed. Requires two ranks or more
per channel.
Populate in this order, odd amount
allowed. Requires three ranks or more
per channel.
CPU.
Odd amount of DIMMs per CPU
allowed.
Mirroring is supported with 6 or 12
DIMMs per CPU.
Populate in this order, odd amount per
CPU allowed. Requires two ranks or
more per channel.
Populate in this order, odd amount per
CPU allowed. Requires three ranks or
more per channel.
Supported with 6 or 12 DIMMs per
CPU.