Datasheet
IBM System x3750 M4 (E5-4600 v2) 11
The x3750 M4 memory system has been carefully tuned so that the server supports higher memory
frequencies than the Intel processor specification. You can, for example, use low-voltage DIMMs but still
operate them at the rated speed.
Table 4 lists the memory options that are available for the x3750 M4 server.
Table 4. Memory options
Part
number
Feature
code
Description Maximum
supported
Models
where
used
RDIMMs - 1866 MHz
00D5048 A3QL 16GB (1x16GB, 2Rx4, 1.5V) PC3-14900 CL13 ECC DDR3
1866MHz LP RDIMM
48 (12 per
processor)
-
00D5032 A3QG 8GB (1x8GB, 1Rx4, 1.5V) PC3-14900 CL13 ECC DDR3
1866MHz LP RDIMM
48 (12 per
processor)
8752-A1x
00D5020 A3QD 4GB (1x4GB, 1Rx4, 1.5V) PC3-14900 CL13 ECC DDR3
1866MHz LP RDIMM
48 (12 per
processor)
-
RDIMMs - 1600 MHz
46W0672 A3QM 16GB (1x16GB, 2Rx4, 1.35V) PC3L-12800 CL11 ECC DDR3
1600MHz LP RDIMM
48 (12 per
processor)
-
00D5036 A3QH 8GB (1x8GB, 1Rx4, 1.35V) PC3L-12800 CL11 ECC DDR3
1600MHz LP RDIMM
48 (12 per
processor)
All other
8752
models
00D5024 A3QE 4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800 CL11 ECC DDR3
1600MHz LP RDIMM
48 (12 per
processor)
-
LRDIMMs
46W0761 A47K 32GB (1x32GB, 4Rx4, 1.5V) PC3-14900 CL13 ECC DDR3
1866MHz LP LRDIMM
48 (12 per
processor)
-
The following rules apply when selecting the memory configuration:
The server supports RDIMMs and LRDIMMs. UDIMMs are not supported.
Mixing different types of memory (RDIMMs and LRDIMMs) is not supported.
Mixing 1.5 V and 1.35 V DIMMs in the same server is supported; in such a case, all DIMMs operate at
1.5 V.
The maximum number of ranks per one channel is eight (with the exception of Load Reduced DIMMs,
where more than eight ranks are supported, because one quad-rank LRDIMM provides the same
electrical load on a memory bus as a single-rank RDIMM).
The maximum quantity of DIMMs that can be installed in the server depends on the number of
processors installed. The table shows the maximum when all four processors are installed. When two
processors are installed, the maximum quantity supported is a half of the quantity that is shown.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of:
Memory speed that is supported by the specific processor.
Lowest of maximum operating speeds for selected memory configuration that depends on rated
speed, operating voltage, and quantity of DIMMs per channel, as shown under "Max. operating
speed" section in the next table.