IBM System x3750 M4 Product Manual page 12

The following memory protection technologies are supported:
ECC

Chipkill (for x4-based memory DIMMs -- look for "x4" in the DIMM description)

Memory mirroring

Memory rank sparing

If memory mirroring is used, then DIMMs must be installed in pairs (minimum of one pair per CPU), and
both DIMMs in a pair must be identical in type and size.
If memory rank sparing is used, then a minimum of one quad-rank DIMM or two single-rank or dual-rank
DIMMs must be installed per populated channel (the DIMMs do not need being identical). In rank sparing
mode, one rank of a DIMM in each populated channel is reserved as spare memory. The size of a rank
varies depending on the DIMMs installed.
The following table lists the memory options that are available for the x3750 M4 server.
Table 5. Memory options
Part Feature
number code
RDIMMs
49Y1406 8941
49Y1559 A28Z
49Y1397 8923
90Y3109 A292
49Y1563 A1QT
00D4968 A2U5
LRDIMMs
49Y1567 A290
90Y3105 A291
IBM System x3750 M4
Description
4 GB (1x 4 GB, 1Rx4, 1.35 V) PC3L-10600 CL9 ECC DDR3
1333 MHz LP RDIMM
4 GB (1x 4 GB, 1Rx4, 1.5 V) PC3-12800 CL11 ECC DDR3
1600 MHz LP RDIMM
8 GB (1x 8 GB, 2Rx4, 1.35 V) PC3L-10600 CL9 ECC DDR3
1333 MHz LP RDIMM
8 GB (1x 8 GB, 2Rx4, 1.5 V) PC3-12800 CL11 ECC DDR3
1600 MHz LP RDIMM
16 GB (1x 16 GB, 2Rx4, 1.35 V) PC3L-10600 CL9 ECC DDR3
1333 MHz LP RDIMM
16 GB (1x 16 GB, 2Rx4, 1.5 V) PC3-12800 CL11 ECC DDR3
1600 MHz LP RDIMM
16 GB (1x 16 GB, 4Rx4, 1.35 V) PC3L-10600 CL9 ECC DDR3
1333 MHz LP LRDIMM
32 GB (1x 32 GB, 4Rx4, 1.35 V) PC3L-10600 CL9 ECC DDR3
1333 MHz LP LRDIMM
Maximum Models
supported where
used
48 (12 per -
CPU)
48 (12 per -
CPU)
48 (12 per All other
CPU) models
48 (12 per A1x
CPU)
48 (12 per -
CPU)
48 (12 per -
CPU)
48 (12 per D2x
CPU)
48 (12 per -
CPU)
12