Dell PowerEdge R740xd2 EMC Installation and Service Manual - Page 96

Removing a memory module

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Table 13. Memory population rules (continued) Processor Configuration Single rank sparing population order Memory population 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Multi rank sparing population order 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Dual processor (Populate round robin starting with processor1) Optimized (Independent channel) population order A{1}, B{1}, A{2}, B{2}, A{3}, B{3}... Memory population information 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. • Odd amount of DIMM slots per processor allowed. • Odd number of DIMM population is allowed. NOTE: Odd number of DIMMs will result in unbalanced memory configurations, which in turn will result in performance loss. It is recommended to populate all memory channels identically with identical DIMMs for best performance. • Optimizer population order is not traditional for 8 and 14 DIMM installations of dual processor. ○ For 8 DIMMs: A1, A2, A4, A5, B1, B2, B4, B5 ○ For 14 DIMMs: A1, A2, A4, A5, A7, A8, A9, A10, B1, B2, B3, B4, B5, B6 Mirroring population order Single rank sparing population order A{1, 2, 3, 4, 5, 6}, B{1, 2, 3, 4, 5, 6} A{1}, B{1}, A{2}, B{2}, A{3}, B{3}... Multi rank sparing population order A{1}, B{1}, A{2}, B{2}, A{3}, B{3}... Mirroring is supported with 6 DIMM slots per processor. Populate in this order, odd amount per processor allowed. Requires two ranks or more per channel. Populate in this order, odd amount per processor allowed. Requires three ranks or more per channel. Removing a memory module Prerequisites 1. Follow the safety guidelines listed in Safety instructions. 2. Power off the system and all attached peripherals. 3. Disconnect the system from the electrical outlet, and disconnect the peripherals. 4. Open the drive bays, remove all drives, and then close the drive bays. 5. Remove the power supply units. 6. Remove the system from the rack and place it on an ESD work bench. For more information, see the Rail Installation Guide available at www.dell.com/poweredgemanuals. 7. Remove the system cover. 8. Remove the air shroud. Locate the appropriate memory module socket. 96 Installing and removing system components

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Table 13. Memory population rules (continued)
Processor
Configuration
Memory population
Memory population information
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 processor
(Populate round robin
starting with
processor1)
Optimized (Independent channel)
population order
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}...
•
Odd amount of DIMM slots per
processor allowed.
•
Odd number of DIMM population
is allowed.
NOTE:
Odd number of
DIMMs will result in
unbalanced memory
configurations, which in
turn will result in
performance loss. It is
recommended to populate
all memory channels
identically with identical
DIMMs for best
performance.
•
Optimizer population order is not
traditional for 8 and 14 DIMM
installations of dual processor.
○
For 8 DIMMs: A1, A2, A4, A5,
B1, B2, B4, B5
○
For 14 DIMMs: A1, A2, A4, A5,
A7, A8, A9, A10, B1, B2, B3,
B4, B5, B6
Mirroring population order
A{1, 2, 3, 4, 5, 6}, B{1, 2, 3, 4, 5,
6}
Mirroring is supported with 6 DIMM
slots per processor.
Single rank sparing population
order
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}...
Populate in this order, odd amount
per processor allowed. Requires two
ranks or more per channel.
Multi rank sparing population order
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}...
Populate in this order, odd amount
per processor allowed. Requires three
ranks or more per channel.
Removing a memory module
Prerequisites
1.
Follow the safety guidelines listed in
Safety instructions
.
2.
Power off the system and all attached peripherals.
3.
Disconnect the system from the electrical outlet, and disconnect the peripherals.
4.
Open the drive bays
, remove
all drives
, and then
close the drive bays.
5.
Remove the
power supply units
.
6.
Remove the system from the rack and place it on an ESD work bench. For more information, see the
Rail Installation Guide
available at
www.dell.com/poweredgemanuals
.
7.
Remove the system cover
.
8.
Remove the air shroud
.
Locate the appropriate memory module socket.
96
Installing and removing system components