Информационное Руководство для IBM 3630 M4 7158E2G
Модели
7158E2G
IBM System x3630 M4
12
Memory options
IBM DDR3 memory is compatibility tested and tuned for optimal System x performance and throughput.
IBM memory specifications are integrated into the light path diagnostics 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.
IBM memory specifications are integrated into the light path diagnostics 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 x3630 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:
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, RDIMMs, and LRDIMMs) 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 number of ranks supported per one channel is eight (with the exception of Load
The maximum number of ranks supported 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 a server depends on the number of
provides the same electrical load on a memory bus as a single-rank RDIMM).
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
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.
"Maximum operating speed" section in Table 4.
Table 4. Maximum memory speeds (Part 1: RDIMMs)
DIMM type
Specification
RDIMM
Rank
Single rank
Dual rank
Quad rank
Rated speed
1333 MHz
1600 MHz 1333 MHz
1600 MHz 1066 MHz
Rated voltage
1.35 V
1.5 V
1.35 V
1.5 V
1.35 V
Operating voltage
1.35 V
1.5 V
1.5 V
1.35 V
1.5 V
1.5 V
1.35 V
Max quantity*
12
12
12
12
12
12
12
Largest DIMM
4 GB
4 GB
4 GB
16 GB
16 GB
8 GB
8 GB
Max memory capacity
48 GB
48 GB
48 GB
192 GB
192 GB
96 GB
96 GB
Max memory at rated speed
48 GB
48 GB
48 GB
192 GB
192 GB
96 GB
NS**
Maximum operating speed (MHz)
1 DIMM per channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz 800 MHz
2 DIMMs per channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz 800 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.
** Rated speed is not supported. Memory DIMMs always operate at speeds lower than rated.
maximum quantity supported is a half of what is shown.
** Rated speed is not supported. Memory DIMMs always operate at speeds lower than rated.