IBM System x3300 M4 Product Guide

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:
The server supports unregistered DIMMs (UDIMMs) and RDIMMs.

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.
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
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.
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.

IBM System x3300 M4 Specifications

General

Brand	IBM
Model	System x3300 M4
Category	Server
Language	English