IBM Express x3300 M4 7382E4G Guida Informativa
Codici prodotto
7382E4G
IBM System x3300 M4
12
Memory options
The IBM System x3300 server 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 two DIMMs per channel. The following rules apply when selecting the memory
configuration:
processor is installed and up to 12 DIMMs when two processors are installed. Each processor has three
memory channels and two DIMMs per channel. The following rules apply when selecting the memory
configuration:
The server supports unregistered DIMMs (UDIMMs) and RDIMMs. LRDIMMs are not supported.
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 this case, all DIMMs operate at
1.5 V.
The maximum number of ranks per channel is eight.
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 "Maximum quantity" row in the following
table.
table.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of the
following speeds:
Memory speed supported by a specific CPU
Lowest maximum operating speed for the selected memory configuration, which depends on the
rated speed, operating voltage, and quantity of DIMMs per channel, as shown in the "Maximum
operating speed" section in the following table
operating speed" section in the following table
Table highlighting: Tables cells highlighted with a gray background indicate when the combination of
DIMM voltage and the number of DIMMs per channel still allows the DIMMs to operate at a rated speed.
DIMM voltage and the number of DIMMs per channel still allows the DIMMs to operate at a rated speed.
Table 5. Maximum memory speeds (Part 1: UDIMMs)
DIMM type
Specification
UDIMMs
Rank
Single rank
Dual rank
Part numbers
49Y1403 (2 GB)
49Y1404 (4 GB)
Rated speed
1333 MHz
1333 MHz
Rated voltage
1.35 V
1.35 V
Operating voltage
1.35 V
1.5 V
1.35 V
1.5 V
Maximum quantity*
12
12
12
12
Largest DIMM
2 GB
2 GB
4 GB
4 GB
Maximum memory capacity
24 GB
24 GB
48 GB
48 GB
Maximum memory at rated speed
12 GB
12 GB
24 GB
24 GB
Maximum operating speed (MHz)
1 DIMM per channel
1333 MHz
1333 MHz
1333 MHz
1333 MHz
2 DIMMs per channel
1066 MHz
1066 MHz
1066 MHz
1066 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.
maximum quantity supported is a half of what is shown.