Installing a memory module
Note: If you are replacing a faulty DIMM, make sure that the replacement DIMM is
the correct type of memory. If you are adding DIMMs, install the DIMMs in the
sequence shown in the following tables. See the User’s Guide for detailed
information about installing memory and the type of memory that is compatible with
the server.
Table 6. DIMM upgrade configuration sequence in mirroring mode
Number of DIMMs DIMM connectors
4 1, 4, 7, 10
8 1, 4, 7, 10, 2, 5, 8, 11
Note: DIMM connectors 3, 6, 9, and 12 are not functional in this server. Do not install
DIMMs in these connectors.
Table 7. DIMM upgrade configuration sequence in non-mirroring mode
Number of DIMMs DIMM connectors
2 1, 4
4 1, 4, 7, 10
6 1, 4, 7, 10, 2, 5
8 1, 4, 7, 10, 2, 5, 8, 11
Note: DIMM connectors 3, 6, 9, and 12 are not functional in this server. Do not install
DIMMs in these connectors.
To install a DIMM, complete the following steps.
1. Turn off the server and all attached devices; then, disconnect all power cords
and external cables.
2. Unlock and remove the side cover (see “Removing the side cover” on page
100).
3. Rotate the power-supply cage assembly out of the chassis:
v Hot-swap models:
a. Remove the hot-swap power-supply. Press down on the orange release
lever and pull the power supply out of the bay, using the handle.
b. Lift up the power-supply cage handle and pull the power-supply cage
assembly all the way up until the retainer latch locks the cage in place
on the chassis.
v
Non-hot-swap models, lift up the power-supply cage handle and pull the
power-supply cage assembly all the way up until the retainer latch locks the
cage in place on the chassis.
4. Make sure that the retaining clip on both ends of the DIMM connector are fully
open.
5. Touch the static-protective package that contains the DIMM to any unpainted
metal surface on the server; then, remove the new DIMM from the package.
6. Turn the DIMM so that the DIMM keys align correctly with the connector.
Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
120 System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
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