Dimm Installation Sequence - IBM System x3650 M4 Type 7915 Installation And User Manual

v For UDIMMs, DIMM connectors 3, 6, 7, and 10 for microprocessor 1 and DIMM
Notes:
1. You can install DIMMs for microprocessor 2 as soon as you install
2. DIMM slots 13-24 are reserved for microprocessor 2; thus, DIMM slots 13-24
The following illustration shows the location of the DIMM connectors on the system
board.

DIMM installation sequence

Depending on the server model, the server may come with a minimum of one 2 GB
or 4 GB DIMM installed in slot 1. When you install additional DIMMs, install them in
the order shown in the following table to optimize system performance. In
non-mirroring mode, all three channels on the memory interface for each
microprocessor can be populated in any order and have no matching requirements.
Important: If you have configured the server to use memory mirroring, do not use
the order in Table 8; go to "Memory mirrored channel" on page 111 and use the
installation order shown there.
110
System x3650 M4 Type 7915: Installation and User's Guide
connectors 15, 18, 19, and 22 for microprocessor 2 are not used.
microprocessor 2; you do not have to wait until all of the DIMM slots for
microprocessor 1 are filled.
are enabled when microprocessor 2 is installed.
CPU2
Ch2 Ch3
Microprocessor 2
Table 8. Non-mirroring (normal) mode DIMM installation sequence
Number of installed
microprocessor
One microprocessor
installed
Two microprocessors
installed
Ch2 Ch3
CH1 CH0
DIMM connector population sequence
1, 4, 9, 12, 2, 5, 8, 11, 3, 6, 7, 10
1, 13, 4, 16, 9, 21, 12, 24, 2, 14, 5, 17, 8, 20, 11, 23, 3, 15,
6, 18, 7, 19, 10, 22
Microprocessor 1
CH1 CH0
CPU1