IBM x3500 M4 7383J2G 用户手册
产品代码
7383J2G
IBM System x3500 M4
12
Memory options
The IBM System x3500 M4 supports DDR3 memory. The server supports up to 12 DIMMs when one
processor is installed and up to 24 DIMMs when two processors are installed. Each processor has four
memory channels, and there are three DIMMs per channel. The following rules apply when selecting the
memory configuration:
processor is installed and up to 24 DIMMs when two processors are installed. Each processor has four
memory channels, and there are three DIMMs per channel. The following rules apply when selecting the
memory configuration:
The server supports UDIMMs, RDIMMs, and LRDIMMs.
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 a case all DIMMs operate at
1.5 V.
The maximum number of ranks per channel is eight (with the exception of Load Reduced DIMMs,
The maximum number of ranks per 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 CPUs,
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 CPUs,
DIMM type, rank, and operating voltage, as shown in the "Max. qty supported" row in Table 5.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of:
All DIMMs in the server operate at the same speed, which is determined as the lowest value of:
Memory speed supported by specific CPU
Lowest maximum operating speed for the selected memory configuration that depends on rated
speed, operating voltage, and quantity of DIMMs per channel, as shown in the "Max. operating
speed" section in Table 5
speed" section in Table 5
Table 5. Maximum memory speeds
DIMM type
DIMM specification
UDIMM
RDIMM
LRDIMM
Rank
Dual rank
Single rank
Dual rank
Quad rank
Quad rank
Rated speed
1333 MHz
1333 MHz
1333 MHz
1600 MHz
1066 MHz
1333 MHz
Rated voltage
1.35 V
1.35 V
1.35 V
1.5 V
1.35 V
1.35 V
Operating voltage
1.35 V
1.5 V
1.35 V
1.5 V
1.35 V
1.5 V
1.5 V
1.35 V
1.5 V
1.35 V
1.5 V
Max. qty supported* 16
16
16
24
16
24
24
16
16
24
24
Max. DIMM
capacity
capacity
2 GB
2 GB
4 GB
4 GB
16 GB
16 GB
4 GB
16 GB
16 GB
32 GB
32 GB
Max. memory
capacity
capacity
32 GB
32 GB
64 GB
96 GB
256GB
384GB
96GB
256GB
256GB
768GB
768GB
Max. operating
speed
speed
______ ______ ______ ______ _______ _______ _______
_______ _______ _______ _______
1 DIMM per channel 1333
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1600
MHz
MHz
800
MHz
MHz
1066
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
2 DIMMs per
channel
channel
1066
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1333
MHz
MHz
1600
MHz
MHz
800
MHz
MHz
800
MHz
MHz
1066
MHz
MHz
1333
MHz
MHz
3 DIMMs per
channel
channel
NS**
NS**
NS**
1066
MHz
MHz
NS**
1066
MHz
MHz
1066
MHz
MHz
NS**
NS**
1066
MHz
MHz
1066
MHz
MHz
* The maximum quantity supported is shown for two processors installed. When one processor installed the
maximum quantity supported is a half of that shown.
** NS = Not supported.
maximum quantity supported is a half of that shown.
** NS = Not supported.