IBM Flex System p24L Installation And Service Manual page 60

Supported DIMMs
Your compute node contains connectors for registered dual inline memory modules (RDIMMs).
Each system board in the IBM Flex System p24L Compute Node contains connectors for 16 low profile
(LP) or very low profile (VLP) memory DIMMs.
The maximum size for a single DIMM is 8 GB for a VLP DIMM and 32 GB for an LP DIMM. The
maximum memory capacity for an IBM Flex System p24L Compute Node is 1024 GB.
Memory module rules:
v Install DIMM fillers in unused DIMM slots for proper cooling.
v Install DIMMs in pairs (1 and 4, 5 and 8, 9 and 12, 13 and 16, 2 and 3, 6 and 7, 10 and 11, and 14 and
15).
v Both DIMMs in a pair must be the same size, speed, type, and technology. You can mix compatible
DIMMs from different manufacturers.
v Each DIMM within a processor-support group (1-4, 5-8, 9-12, 13-16) must be the same size and speed.
v Install only supported DIMMs, as described on the ServerProven website.
v Installing or removing DIMMs changes the configuration of the compute node. After you install or
remove a DIMM, the compute node is automatically reconfigured, and the new configuration
information is stored.
The following table shows allowable placements of DIMM modules for the IBM Flex System p24L
Compute Node.
Table 5. Memory module combinations for the IBM Flex System p24L Compute Node
DIMM
count
1 2 3
2 X
4 X
6 X
8 X
X X X
10
12 X X X
X X X
14
16 X X X
Figure 19. DIMM connectors for the IBM Flex System p24L Compute Node
Related reference:
48
Power Systems: IBM Flex System p24L Compute Node Installation and Service Guide
IBM Flex System p24L Compute Node
4 5 6 7
X
X
X X
X X
X X
X X
X X X X
X X X X
8 9 10 11
X
X X
X X
X X
X X X X
X X X X
X X X X
12 13 14 15
X
X
X X
X X
X X
X X
X X X X
16
X
X
X
X
X