Dell PowerEdge 850 - Manual (Page 124)

message stating that maximum memory has been exceeded, see " Indicators, Messages, and Codes " for more information. You can purchase memory upgrade
kits from Dell.
Memory Module Installation Guidelines
The memory module sockets are arranged in banks (1 and 2) on two channels (A and B). 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 5 -1 shows examples of different memory configurations, based on the following guidelines:
l If only one memory module is installed, it must be installed in the DIMM1_A socket.
l A bank must contain identical memory modules.
l Install the memory modules in bank 1 (DIMM1_x) before installing memory modules in bank 2 (DIMM2_x).
l Installing three memory modules is not supported.
Table 5-1. Sample Memory Module Configurations
Installing Memory Modules
1. Open the system. See " Opening the System " in "Troubleshooting Your System."
2. Locate the memory module sockets. See Figure A -3 .
3. Press the ejectors on the memory module socket down and out, as shown in Figure 5 -8 , to allow the memory module to be inserted into the socket.
4. Align the memory module's edge connector with the alignment keys of the memory module socket, and insert the memory module in the socket.
5. Press down on the memory module with your thumbs while pulling up on the ejectors with your index fingers to lock the memory module into the socket.
When the memory module is properly seated in the socket, the ejectors on the memory module socket align with the ejectors on the other sockets that
have memory modules installed.
NOTE: The memory modules must be PC-3200 compliant.
Total Memory DIMM1_A DIMM2_A DIMM1_B DIMM2_B
256 MB 256 MB None None None
512 MB 256 MB None 256 MB None
512 MB 512 MB None None 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 512 MB 512 MB 512 MB 512 MB
2 GB 1 GB None 1 GB None
3 GB 1 GB 512 MB 1 GB 512 MB
4 GB 1 GB 1 GB 1 GB 1 GB
4 GB 2 GB None 2 GB None
5 GB 2 GB 512 MB 2 GB 512 MB
6 GB 2 GB 1 GB 2 GB 1 GB
8 GB 2 GB 2 GB 2 GB 2 GB
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system.
Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the
computer and protecting against electrostatic discharge.
NOTE: The memory module socket has two alignment keys that allow you to install the memory module in the socket in only one way.