Plugging rules for memory modules in the
5105-22E, 9008-22L, 9009-22A,
9009-22G, 9009-41A, 9009-41G, 9009-42A, 9009-42G,
9223-22H, 9223-22S, 9223-42H, or 9223-42S system
Find information about the configurations and rules that apply to memory modules for the 5105-22E, IBM®
Power® System L922 (9008-22L), IBM
Power System S922 (9009-22A and 9009-22G),
IBM
Power System H922 (9223-22H), or IBM
Power System H922S (9223-22S), IBM
Power System S914 (9009-41A and 9009-41G),
IBM
Power System S924 (9009-42A and 9009-42G),
IBM
Power System H924 (9223-42H), or IBM
Power System H924S (9223-42S)
server.
This information helps you to plan memory module installation in the system.
The system supports memory modules of 8GB,
16 GB, 32 GB, 64 GB, and 128 GB.
A system with one system processor supports a minimum of two (a pair of) memory modules and provides a minimum of 16 GB
memory.
A system with two system processors supports a minimum of four (two pairs of) memory modules and provides a minimum of 32 GB
memory.
A pair of memory modules must be
the same size, rank, and memory density.
Memory locations are assigned to groups; memory modules in each of the groups must be the
same size, rank, and memory density.
Groups of memory modules can be
of different sizes, ranks and memory densities than other groups.
Each system processor supports 2, 4, 6, 8, 12, or 16 memory modules.
128 GB memory modules that are located in the same channel must be made by the same manufacturer (Samsung Electronics Co., Ltd. or SK hynix Inc.). Channels are defined in pairs as follows: P1-C33 and P1-C34, P1-C17 and P1-C18, P1-C31 and P1-C32, P1-C15 and P1-C16, P1-C35 and P1-C36, P1-C21 and P1-C22, P1-C37 and P1-C38, P1-C19 and P1-C20, P1-C41 and P1-C42, P1-C25 and P1-C26, P1-C39 and P1-C40, P1-C23 and P1-C24, P1-C43 and P1-C44, P1-C29 and P1-C30, P1-C45 and P1-C46, and P1-C27 and P1-C28.
If you are installing 128 GB memory modules
that are manufactured by Samsung Electronics Co., Ltd. in a new or existing configuration so that
the resulting configuration will have more than half of the allowable memory module locations populated, the
system firmware level must be FW950.50, or later.
Table 1 lists the
feature codes of the supported memory modules.
Table 1. Memory feature codes
Size
Feature code
Rank
Memory Density
8 GB
EM60, EM6G
1R
4 Gb
16 GB
EM62, EM6J
1R
8 Gb
32 GB
EM63, EM6K
2R
8 Gb
64 GB
EM64, EM6L
2R
8 Gb
64 GB
EM7B
2R
16 Gb*
128 GB
EM65, EM6M
2R
8 Gb
128 GB
EM7C
2R
16 Gb*
Note:
* The system firmware level must be FW950.00, or later.
The plugging rules for memory modules depend on the number of system
processors:
Plugging rules for systems with one system processor
One system processor supports 2, 4, 6, 8, 12, or 16 memory modules. Figure 1 and Figure 2 show the locations of the memory modules for systems with one system
processor. After the first four pairs of memory modules are installed, the remaining memory
slots must be filled four at a time versus two at a time.Figure 1. Plugging sequence, one system processor, rack-mounted system
Figure 2. Plugging sequence, one system processor, stand-alone system
The system has groups for the memory modules. All of the memory modules in a group must be the same size and
type. The memory in one group can be different than another group.
Table 2. Memory groupings for a single-processor system
Memory group
Positions
A
P1-C17, P1-C18, P1-C33, and P1-C34
B
P1-C15, P1-C16, P1-C31, and P1-C32
C
P1-C21, P1-C22, P1-C35, and P1-C36
D
P1-C19, P1-C20, P1-C37, and P1-C38
When the system contains eight or fewer memory modules, extra rules against mixing memory of
different ranks (1R or 2R) apply. These positions must have the same rank; either 1R or 2R, but they
cannot contain both 1R and 2R:
Sequences 1 and 3: P1-C17, P1-C33, P1-C15, and P1-C31
Sequences 2 and 4: P1-C22, P1-C36, P1-C20, and P1-C38
Table 3 shows that
the memory modules must be plugged into the
system in a certain sequence and position.
Table 3. Plugging sequence for memory modules for
a system with one system processor
Total memory modules
Sequence
Memory modules to install
Memory locations
2
1
2
P1-C17 and P1-C33. Minimum supported memory.
4
2
2
P1-C22 and P1-C36
6
3
2
P1-C15 and P1-C31
8
4
2
P1-C20 and P1-C38
12
5
4
P1-C18 and P1-C34 (group A; must match the size and type of P1-C17 and P1-C33) and
P1-C16 and P1-C32 (group B; must match the size and type of P1-C15 and P1-C31)
16
6
4
P1-C21 and P1-C35 (group C; must match the size and type of P1-C22 and P1-C36).
and P1-C19 and P1-C37 (group
D; must match the size and type of P1-C20 and P1-C38)
Plugging rules for systems with two system
processors
Two system processors support 4, 6, 8, 10, 12, 14, 16, 20, 24, 28, or 32 memory modules. Figure 3 shows the locations of the memory modules for systems with two system
processors. After the first eight pairs of memory modules are installed, the remaining memory
slots must be filled four at a time (versus two at a time).Figure 3. Plugging sequence, two system processors
The system has groups for the memory modules. All of the memory modules in a group must be the same size and
type. The memory in one group can be different than another group.
Table 4. Memory groupings for a two-processor system
Memory groupings
Positions
A
P1-C17, P1-C18, P1-C33, and P1-C34
B
P1-C15, P1-C16, P1-C31, and P1-C32
C
P1-C21, P1-C22, P1-C35, and P1-C36
D
P1-C19, P1-C20, P1-C37, and P1-C38
E
P1-C25, P1-C26, P1-C41, and P1-C42
F
P1-C23, P1-C24, P1-C39, and P1-C40
G
P1-C29, P1-C30, P1-C43, and P1-C44
H
P1-C27, P1-C28, P1-C45, and P1-C46
When the system contains 16 or fewer memory modules, extra rules against mixing memory of
different ranks (1R or 2R) apply. These positions must have the same rank; either 1R or 2R, but they
cannot contain both 1R and 2R:
Sequences 1 and 5: P1-C17, P1-C33, P1-C15, and P1-C31
Sequences 2 and 6: P1-C25, P1-C41, P1-C23, and P1-C39
Sequences 3 and 7: P1-C22, P1-C36, P1-C20, and P1-C38
Sequences 4 and 8: P1-C30, P1-C44, P1-C28, and P1-C46
Table 5 shows that
the memory modules must be plugged into the
system in a certain sequence and position.
Table 5. Plugging sequence for memory modules for
a system with two system processors
Total memory modules
Sequence
Memory modules to install
Memory locations
2
1
2
P1-C17 and P1-C33. Must have another pair that is installed.
4
2
2
P1-C25 and P1-C41. Minimum supported memory.
6
3
2
P1-C22 and P1-C36
8
4
2
P1-C30 and P1-C44
10
5
2
P1-C15 and P1-C31
12
6
2
P1-C23 and P1-C39
14
7
2
P1-C20 and P1-C38
16
8
2
P1-C28 and P1-C46
20
9
4
P1-C18 and P1-C34 (group A; must match the size and type of P1-C17 and P1-C33) and
P1-C16 and P1-C32 (group B; must match the size and type of P1-C15 and P1-C31)
24
10
4
P1-C26 and P1-C42 (group E; must match the size and type of P1-C25 and P1-C41) and
P1-C24 and P1-C40 (group F; must match the size and type of P1-C23 and P1-C39)
28
11
4
P1-C21 and P1-C35 (group C; must match the size and type of P1-C22 and P1-C36).
and P1-C19 and P1-C37 (group
D; must match the size and type of P1-C20 and P1-C38)
32
12
4
P1-C29 and P1-C43 (group G; must match the size and type of P1-C30 and P1-C44) and
P1-C27 and P1-C45 (group H; must match the size and type of P1-C28 and P1-C46)
