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Memory Placement for a Memory Riser Card
Memory riser cards can be populated with up to four quads. Each quad is a group of
four DIMMs; the quads are labeled A, B, C, and D. The following rules apply to DIMM
placement on a memory riser card:
v Each memory quad must contain four DIMMs of equal memory size.
v Quad memory size may be mixed on a memory riser card.
v The minimum memory is four DIMMs installed in quad A, as shown in the following
figure:
v To increase memory, add more quads to a memory riser card or replace the DIMMs
in a quad with DIMMs of a larger size.
v Populate the memory riser card starting with quad A and continuing with quads B, C,
and D as shown above.
Memory DIMMs
Removing Memory DIMMs
1. If you have not already done so, shut down the system as described in "Stopping
2. If you have not already done so, unplug the system unit power cable from the
3. If you have not already done so, remove the covers as described in "Removing the
4. If you have not already done so, remove the processor and memory riser card
5. If you have not already done so, remove the memory riser card as described in
6. Locate the memory DIMM connectors and determine which DIMMs you want to
346
Service Guide
the System Unit" on page 316.
electrical outlet.
Covers" on page 311.
cover as described in "Removing Processor and Memory Riser Card Cover" on
page 315.
"Removing a Memory Riser Card or One-Way Processor Card" on page 342.
remove.
(15) A
(16) A
(13) B
(14) B
(12) C
(11) C
(10) D
(9) D
(7) D
(8) D
(6) C
(5) C
(3) B
(4) B
(2) A
(1) A
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