Installing A Dimm - IBM System x3550 M4 Installation And User Manual

v The memory rank sparing feature is supported on server models with an Intel
v The maximum available memory is reduced when memory rank sparing mode is
The following diagram lists the DIMM connectors on each memory channel.
Figure 2. Connectors on each memory channel
Follow the installation sequence for rank sparing mode:
v Install at least one quad-rank DIMM in a channel.
v Install at least two single-rank or dual-rank DIMMs in a channel.

Installing a DIMM

To install a DIMM, complete the following steps:
1. Read the safety information that begins on page vii and "Installation guidelines"
2. Turn off the server and peripheral devices and disconnect the power cords and
3. Remove the cover (see "Removing the cover" on page 50).
4. Remove the air baffle (see "Removing the air baffle" on page 51).
5. Open the retaining clip on each end of the DIMM connector.
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IBM System x3550 M4 Type 7914: Installation and User's Guide
™
Xeon E5-2600 series microprocessor.
enabled.
Table 9. Memory rank sparing mode DIMM population sequence
Number of DIMMs
First pair of DIMMs
Second pair of DIMMs
Third pair of DIMMs
Fourth pair of DIMMs
Fifth pair of DIMMs
Sixth pair of DIMMs
Seventh pair of DIMMs
Eighth pair of DIMMs
Ninth pair of DIMMs
Tenth pair of DIMMs
Eleventh pair of DIMMs
Twelfth pair of DIMMs
Note: DIMM connectors 3, 6, 7, 10, 15, 18, 19, and 22 are not used in memory rank
sparing mode when UDIMMs are installed in the server.
on page 38.
all external cables, if necessary.
Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
Number of installed
microprocessor
1
1
1
1
1
1
2
2
2
2
2
2
DIMM connector
1, 2
4, 5
8, 9
11, 12
7, 10
3, 6
13, 14
16, 17
20, 21
23, 24
19, 22
15, 18