System Memory

The four memory module sockets are located on the system board adjacent to the power supply and can accommodate from 512 MB to 4 GB of unbuffered ECC PC-3200 (DDR400) memory. See Figure 6-1 for the location of the memory module sockets.

You can upgrade the system memory by installing combinations of 256-, 512-MB, and 1-GB unbuffered memory modules. If you receive an error message stating that maximum memory has been exceeded, see "Indicators, Messages, and Codes" for more information. You can purchase memory upgrade kits from Dell.

NOTE: The memory modules must be PC-3200 compliant.

Memory Module Installation Guidelines

The memory module sockets are arranged in banks (1 and 2) on two channels (A and B). See Figure A-3 for the location of the memory module sockets. The memory module banks must be installed in identical pairs.

The memory module banks are identified as follows:

Bank 1: DIMM1_A and DIMM1_B

Bank 2: DIMM2_A and DIMM2_B

For example, if socket DIMM1_A contains a 256-MB memory module, then socket DIMM1_B must contain a 256-MB memory module.

Table 6-1 shows examples of different memory configurations.

If only one memory module is installed, it must be installed in the DIMM1_A socket.

A bank must contain identical memory modules.

Install the memory modules in bank 1 (DIMM1_x) before installing memory modules in bank 2 (DIMM2_x).

Installing three memory modules is not supported.

Table 6-1. Sample Memory Module Configurations

Total

DIMM1_A

DIMM2_A

DIMM1_B

DIMM2_B

Memory

 

 

 

 

 

 

 

 

 

512 MB

256 MB

None

256 MB

None

1 GB

256 MB

256 MB

256 MB

256 MB

1 GB

512 MB

None

512 MB

None

1.5 GB

512 MB

256 MB

512 MB

256 MB

2 GB

1 GB

None

1 GB

None

2 GB

512 MB

512 MB

512 MB

512 MB

Installing System Components

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Dell 745N manual System Memory, Memory Module Installation Guidelines, Sample Memory Module Configurations Total