IBM X3950 X5 Problem Determination And Service Manual page 207

To install a memory module in the memory expansion module, complete the
following steps.
Note: The memory expansion module might come with DIMM fillers on DIMM
connectors that are not populated. Remove them before you install DIMMs in
those connectors.
Procedure
1. Touch the static-protective package that contains the new DIMM to any
unpainted metal surface on the outside of the memory expansion module; then,
remove the DIMM from the package.
2. Turn the DIMM so that the DIMM keys align correctly with the connector.
3. Insert the DIMM into the connector by aligning the edges of the DIMM with
the slots at the ends of the DIMM connector.
4. Firmly press the DIMM straight down into the connector by applying pressure
on both ends of the DIMM simultaneously. The retaining clips snap into the
locked position when the DIMM is firmly seated in the connector.
Note: If there is a gap between the DIMM and the retaining clips, the DIMM
has not been correctly inserted; open the retaining clips, remove the DIMM,
and then reinsert it.
5. Grasp the system-board tray on both sides (near the stop-tabs) and align the
system-board tray with the chassis.
6. Slide the system-board tray forward until the tabs at the bottom of the handles
touch the chassis; then, close the handles and press firmly on the release latches
to snap them into the locked position.
7. Reinstall the bezel (see "Replacing the memory expansion module bezel" on
page 178).
8. Reconnect the power cords to the memory expansion module; then, connect all
external cables to the memory expansion module.
9. Turn on the peripheral devices and the host server.
Chapter 5. Removing and replacing components
191