IBM xSeries 380 Hardware Maintenance Manual page 199

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Read "Before you begin" on page 136.
Read "Safety information" on page 257 .
Read "Handling electrostatic discharge-sensitive devices" on page 260.
Attention: DIMM slots on the memory module must be installed only in certain
configurations. Numbers next to DIMM slots correspond to installation sequence.
DIMMs must be installed by groups of four and must be inserted in the sequence
shown in the second illustration at step 4. below.
Note: For optimal DIMM performance, be sure that both memory boards in the
server have the same amounts of the same type of installed memory.
1.
Expose the memory boards by removing the Processor/Memory Complex as
described in "Processor/memory complex removal" on page 177.
2.
Holding the DIMM only by its upper edges, remove it from its antistatic package.
3.
Orient the DIMM so that the two notches in the bottom edge of the DIMM align
with the keyed socket on the memory board.
4.
Insert the bottom edge of the DIMM into the socket, then press down firmly on
the DIMM until it seats correctly.
FRU information (service only)
189

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