IBM System x3750 M4 Type 8722 Installation And Service Manual page 63

The following table lists the supported combinations of ranked DIMMs
(RDIMMs) that you can install in the server.
Note: The server does not support the mixing of RDIMMs and LR-DIMMs in
the same server.
Table 11. Supported combinations of ranked RDIMMs per memory channel
Configuration DIMM 1 (far DIMM)
1 Single-rank
2 Dual-rank
3 Quad-rank
4 Single-rank
5 Dual-rank
6 Dual-rank
7 Quad-rank
8 Quad-rank
9 Quad-rank
10 Single-rank
11 Dual-rank
12 Dual-rank
13 Dual-rank
The following table lists the supported combinations of ranked load-reduced
DIMMs (LR-DIMMs) that you can install in the server.
Note: The server does not support the mixing of RDIMMs and LR-DIMMs in
the same server.
Table 12. Supported combinations of ranked LR-DIMMs per memory channel
DIMM 1 (far
Configuration DIMM)
1 Quad-rank
2 Quad-rank
3 Quad-rank
v The following table lists the memory speed based on the type of ranked DIMM
and the voltage at which the DIMM runs.
Table 13. Memory speeds and configurations based on ranked DIMM type and voltage
DIMM rank,
type, and DIMM
technology capacity
Single-rank 4 GB
x4 RDIMM -
2 Gb (1333
MHz)
DIMM 2 (middle
DIMM)
Empty
Empty
Empty
Single-rank
Single-rank
Dual-rank
Single-rank
Dual-rank
Quad-rank
Single-rank
Single-rank
Dual-rank
Dual-rank
DIMM 2 (middle
DIMM)
Empty
Quad-rank
Quad-rank
1 DIMM per 2 DIMMs per
channel channel
1.35 V 1.50 V 1.35 V
1333 1333 1333
DIMM 3 (near
DIMM)
Empty
Empty
Empty
Empty
Empty
Empty
Empty
Empty
Empty
Single-rank
Single-rank
Single-rank
Dual-rank
DIMM 3 (near
DIMM)
Empty
Empty
Quad-rank
3 DIMMs per
channel
1.50 V 1.35 V
1333 1066
Chapter 2. Installing optional devices
1.50 V
1066
47