1. Installing Internal Optional Devices
Express5800/R120h-2M (3rd-Gen) User’s Guide
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Chapter 2 Preparations
DIMM installation order
Note
See Memory RAS features supported by additional memory board in 1.11.3
Memory RAS Feature before using memory RAS feature.
This server's memory subsystem is divided into channels. Each processor supports 6 channels and each channel
supports 2 DIMM slots.
Please see the following chart for the location of the slot number.
Front
The order of installation may be different on x1CPU (PROC1) configuration and x2 CPU (PROC1, PROC2)
configuration.
When only CPU1 is mounted
DIMM slot number
1 2 3 4 5
6
7
8
9 10 11 12
DIMM Mounte
d numb
er an
d i
nstall
ation
1 DIMM
1
2 DIMM
1
2
3 DIMM
1
2
3
4 DIMM
4
3
1
2
5 DIMM
5
4
1
2
3
6 DIMM
6
5
4
1
2
3
7 DIMM
6
5
4
7
1
2
3
8 DIMM
4
8
3
7
5
1
6
2
9 DIMM
6
5
4
7
1
8
2
9
3
10 DIMM
6
5
10
4
9
7
1
8
2
3
11 DIMM
6
5
11
4
10 7
1
8
2
9
3
12 DIMM
6
12
5
11
4
10 7
1
8
2
9
3
Important If the number of DIMMs mounted is 5, 7, 9, 10, or 11, Information Message 510 is
displayed in the "Unbalanced, not recommended" state during POST. This does not
require any action.
510 - The installed number of DIMMs on one or more processors results in an
unbalanced memory configuration across memory controllers. This may result in
non-optimal memory