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Retaining
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8. Insert the DIMM into the connector by aligning the edges of the DIMM with the
slots at the ends of the DIMM connector.
9. Firmly press one end of the DIMM into the connector; then, press the other
end into the connector. The retaining clips snap into the locked position when
the DIMM is seated in the connector. 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.
10. Repeat steps 5 through 9 to install the second DIMM in the pair and for each
additional pair that you install.
11. Replace the memory card:
a. Insert the memory card into the memory card connector.
b. Press the memory card into the connector and close the retention levers.
If you have other options to install or remove, do so now; otherwise, go to
“Completing the installation” on page 47.
Hot-swapping DIMMs
To hot-swap DIMMs, complete the following steps:
1. Read the safety information that begins on page v and “Installation guidelines”
on page 21.
Attention: Static electricity that is released to internal server components
when the server is powered-on might cause the server to halt, which could
result in the loss of data. To avoid this potential problem, always use an
electrostatic-discharge wrist strap or other grounding system when working
inside the server with the power on.
2. Remove the top cover from the server (see “Removing the cover and bezel” on
page 23).
Attention: When moving the memory card, do not allow it to touch any
components or structures inside the server.
Make sure that the memory hot-swap enabled LED is lit.
38 IBM System x3950 Type 8878 and System x3950 E Type 8879: User’s Guide