Product guide

IBM System x3530 M4 12
Memory options
IBM DDR3 memory is compatibility tested and tuned for optimal IBM System x® performance and
throughput. IBM memory specifications are integrated into the light path diagnostics panel for immediate
system performance feedback and optimum system uptime. From a service and support standpoint, IBM
memory automatically assumes the IBM system warranty, and IBM provides service and support
worldwide.
The IBM System x3530 M4 supports DDR3 memory. The server supports up to six DIMMs when one
processor is installed, and up to 12 DIMMs when two processors are installed. Each processor has three
memory channels, and there are two DIMMs per channel. The following rules apply when selecting the
memory configuration:
Mixing different types of memory (UDIMMs and RDIMMs) is not supported.

Mixing 1.5 V and 1.35 V DIMMs in the same server is supported; in such cases, all DIMMs operate at

1.5 V.
The maximum quantity of DIMMs that can be installed in a server depends on the number of

processors (six DIMMs with one processor installed, 12 DIMMs with two processors installed)
All DIMMs in all processor memory channels operate at the same speed, which is determined as the

lowest value of:
The memory speed supported by the specific processor.

The lowest of maximum operating speeds for the selected memory configuration that depends on

the rated speed, operating voltage, and quantity of DIMMs per channel, as shown under the
"Maximum operating speed" section in Table 4.
Table 4. Maximum memory speeds
DIMM type
Specification
UDIMM RDIMM
Rank Dual rank Single rank Dual rank
Rated speed 1333 MHz 1333 MHz 1600
MHz
1333 MHz 1600
MHz
Rated voltage 1.35 V 1.35 V 1.5 V 1.35 V 1.5 V
Operating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V
Max quantity* 12 12 12 12 12 12 12 12
Largest DIMM 4 GB 4 GB 4 GB 4 GB 4 GB 16 GB 16 GB 8 GB
Max memory capacity 48 GB 48 GB 48 GB 48 GB 48 GB 192 GB 192 GB 96 GB
Max memory at max speed 24 GB 24 GB 48 GB 48 GB 48 GB 192 GB 192 GB 96 GB
Maximum operating speed (MHz)
1 DIMM per channel 1333
MHz
1333
MHz
1333
MHz
1333
MHz
1600
MHz
1333
MHz
1333
MHz
1600
MHz
2 DIMMs per channel 1066
MHz
1066
MHz
1333
MHz
1333
MHz
1600
MHz
1333
MHz
1333
MHz
1600
MHz
* Maximum quantity supported is shown for two processors installed. When one processor is installed, the
maximum quantity supported is a half of what is shown.