Removing a memory module (DIMM)
To remove a DIMM, complete the following steps.
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 87.
2. Turn off the server and peripheral devices, and disconnect the power cord and
all external cables.
3. Remove the cover (see “Removing the cover” on page 90).
4. Remove the riser-card assembly (see “Removing the riser-card assembly” on
page 96).
5. Remove the air baffle over the DIMMs (see “Removing the DIMM air baffle” on
page 92).
Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
6. Open the retaining clip on each end of the DIMM connector and lift the DIMM
from the connector.
7. Replace the DIMM or remove the second DIMM of the pair.
8. If you are instructed to return the DIMM, follow all packaging instructions, and
use any packaging materials for shipping that are supplied to you.
Installing a memory module
For information about the types of dual inline memory modules (DIMMs) that the
server supports and other information that you must consider when installing
DIMMs, see the User’s Guide on the IBM Documentation CD.
v The server comes with a minimum of two 512 MB DIMMs, installed in slots 1 and
4. When you install additional DIMMs, you must install two identical DIMMS at a
time, in the order shown in the following table, to maintain performance.
Table 7. DIMM installation sequence
Pair DIMM connectors
1 1 and 4
2 7 and 10
3 2 and 5
4 8 and 11
5 3 and 6
6 9 and 12
114 IBM System x3650 Type 7979 and 1914: Problem Determination and Service Guide
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