IBM ThinkCentre 8143 User Manual page 29

1. Remove the cover. See "Removing the cover" on page 10.
2. Locate the DIMM connectors. See "Identifying parts on the system board" on
page 11.
v If the two DIMM connectors closest to the edge of the board are a yellow
color, your system board has DDR type memory. DDR DIMMs are 184-pin,
2.5 V and can be used in any combination of 128 MB, 256 MB, 512 MB, and 1
GB sizes.
v If the two DIMM connectors closest to the edge of the board are a green
color, your system board has DDR2 type memory. DDR2 DIMMs are 240-pin,
1.8 V and can be used in any combination of 256 MB, 512 MB, and 1 GB
sizes.
Note: The type of memory required is also indicated in text near the IBM
logo on the system board.
To install a DIMM:
1. Remove the cover. See "Removing the cover" on page 10.
2. Locate the DIMM connectors. See "Identifying parts on the system board" on
page 11.
3. Open the retaining clips.
4. Make sure the notches in the DIMM align with the tabs on the connector. Push
or insert the DIMM straight down into the connector until the retaining clips
close.
What to do next:
v To work with another option, go to the appropriate section.
v To complete the installation, go to "Replacing the cover and connecting the
cables" on page 25.
Chapter 1. Installing options
13