Installing A Dimm - IBM System x3550 M3 Type 4254 Installation And User Manual

(see "Starting the Setup utility" on page 108). When you use the memory
online-spare feature, consider the following information:
v The memory online-spare feature is supported on server models with an Intel
v When you enable the memory online-spare feature, you must install three DIMMs
v The maximum available memory is reduced to 2/3 of the installed memory when
The following table shows the installation sequence for installing DIMMs for each
microprocessor in memory online-spare mode:

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 52).
4. Open the retaining clip on each end of the DIMM connector.
™
Xeon 5600 series microprocessor.
per microprocessor at a time. The first DIMM must be in channel 0, the second
DIMM in channel 1, and the third DIMM in channel 2. The DIMMs must be
identical in size, type, rank, and organization, but not in speed. The channels run
at the speed of the slowest DIMM in any of the channels.
memory online-spare mode is enabled. For example, if you install 72 GB of
memory using RDIMMs, only 48 GB of addressable memory is available when
you use memory online-spare.
Table 11. Memory online-spare mode DIMM population
sequence
Installed
Microprocessor
Microprocessor 1
Microprocessor 2
on page 44.
all external cables, if necessary.
Attention: To avoid breaking the retaining clips or damaging the DIMM
connectors, open and close the clips gently.
DIMM connector
3, 6, 9
3, 6, 9, 2, 5, 8
3, 6, 9, 2, 5, 8, 1, 4, 7
12, 15, 18,
12, 15, 18, 11, 14, 17,
12, 15, 18, 11, 14, 17, 10, 13, 16
Chapter 2. Installing optional devices
61