Memory Installation Conventions

Before installing memory, read and understand the following memory installation conventions:

•Supported DIMM sizes and memory configurations

•DIMM load order

•DIMM slot IDs

Supported DIMM Sizes and Memory Configurations

The standard server configuration includes an 8-DIMM memory carrier which contains two

4-DIMM memory boards. An optional, high-capacity memory configuration is also available: a 24-DIMM memory carrier containing two 12-DIMM memory boards.

System DIMMs seat onto the memory boards. The minimum server configuration requires at least one memory pair in the 8-DIMM memory carrier, and one memory quad (group of four DIMMs) in the 24-DIMM memory carrier.

The following are the supported DIMM sizes for the server:

•512 MB

•1 GB

•2 GB

•4 GB

Table 3-4lists the supported memory configurations for the server.

Table 3-4 Supported Memory Configurations

Memory Carrier Type

Memory Boards Installed

Minimum Memory

Maximum Memory

 

 

Configuration

Configuration

 

 

 

 

8-DIMM memory carrier

Two 4-DIMM memory

2-GB (one pair: two 1-GB

32 GB (eight 4 GB DIMMs)

(standard)

boards

DIMMs)

 

 

 

 

 

24-DIMM memory carrier

Two 12-DIMM memory

2 GB (one quad: four 512

96 GB (24x4 GB DIMMs)

(optional, high-capacity)

boards

MB DIMMs)

 

 

 

 

 

Memory Load Order

When installing memory, use a minimum of one pair in the 8-DIMM memory carrier, and one quad in the 24-DIMM memory carrier, of like-sized DIMMs. Insert additional DIMMs into the memory carriers in the next available pair or quad, in order of capacity from largest to smallest.

Install DIMMs into the appropriate slots on the memory carrier board; each slot has a unique ID. Use Figure 3-9and Figure 3-10to determine where to install DIMMs on the memory carrier board.

CAUTION: Do not mix DIMM sizes or types within a pair or quad. Load DIMM pairs and quads in order of capacity from largest to smallest. For example, if you have a quad of 2 GB DIMMs and a quad of 1 GB DIMMs, install the quad of 2 GB DIMMs first.

Failure to observe these cautions results in system degradation or failure

8-DIMM Memory Carrier Load Order The 8-DIMM memory carrier has two sides labeled side 0 and side 1, each of which contains a memory carrier board. The 8-DIMM memory carrier can contain one to four pairs of memory. Pairs of memory are divided equally between the two sides of the memory carrier. For example, if you have two pairs of memory to install, load two DIMMs in slots 0A and 0B of side 0, and load two DIMMs in slots 0A and 0B of side 1.

Table 3-5lists the 8-DIMM memory carrier load order.

68 Installing the System