IBM xSeries 380, Hardware Maintenance Manual

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Hardware Maintenance Manual: xSer ies 380
Note:
• Read “Before you begin” on page 136.
• Read “Safety information” on page 257.
• Read “Handling electrostatic discharge-sensitive devices” on page 260.
1. Expose the memory boards by removing the Processor/Memory complex as
described in “Processor/memory complex removal” on page 177.
Note: It is not necessary to remove the memory boards from the
Processor/Memory Complex to add or replace DIMMs.
2. Gently push the plastic ejector levers out and down to eject a DIMM from its
socket.
3. Hold the DIMM only by its upper edges, being careful not to touch its
components or gold edge connectors. Carefully lift it away from the socket and
store it in an antistatic package.
4. Repeat steps 2. and 3. for each DIMM you want to remove.
DIMM installation
Attention: Use extreme care when installing a DIMM. Applying too much pressure
can damage the socket. DIMMs are keyed and can be inserted in only one way.
Mixing dissimilar metals might cause memory failures later, resulting in data
corruption. Install DIMMs with gold-plated edge connectors only in gold-plated
sockets.
Maximum DIMM height is 4.445 cm (1.75 inches). Do not install DIMMs that exceed
this height.
Complete the following actions to install a DIMM.
Note: