• Install at least two single-rank or dual-rank DIMMs in a channel.
Table 14. Memory rank sparing mode DIMM population sequence
Number of DIMMs
Number of installed
microprocessor
DIMM connector
First pair of DIMMs
1
1, 2
Second pair of DIMMs
1
4, 5
Third pair of DIMMs
1
8, 9
Fourth pair of DIMMs
1
11, 12
Fifth pair of DIMMs
1
3, 6
Sixth pair of DIMMs
1
7, 10
Seventh pair of DIMMs
1
13, 14
Eighth pair of DIMMs
1
16, 17
Ninth pair of DIMMs
1
20, 21
Tenth pair of DIMMs
1
23, 24
Eleventh pair of DIMMs
1
15, 18
Twelfth pair of DIMMs
1
19, 22
Replacing a memory module
Use this information to replace a memory module.
Step 1.
Read the safety information that begins on “Safety” on page v and “Installation guidelines” on
page 297.
Step 2.
Turn off the server and peripheral devices and disconnect the power cords and all external cables,
if necessary.
Step 3.
Remove the top cover (see “Removing the top cover” on page 149).
Step 4.
Remove the air baffle (see “Removing the air baffle” on page 152).
Step 5.
Carefully open the retaining clips on each end of the DIMM connector and remove the DIMM.
Attention:
To avoid breaking the retaining clips or damaging the DIMM connectors, open and
close the clips gently.
Installing, removing, and replacing components
177
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