Lenovo 8427 Personal Computer User Manual


 
To determine the type of memory required:
1. Remove the computer cover. See “Removing the cover” on page 10.
2. Locate the memory module connectors. See “Identifying parts on the system
board” on page 11.
v If the two memory module connectors closest to the edge of the board are a
yellow color, your system board has DDR type memory. DDR memory
modules 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 memory module connectors closest to the edge of the board are a
green color, your system board has DDR2 type memory. DDR2 memory
modules are 240-pin, 1.8 V and can be used in any combination of 256 MB,
512 MB, and 1 GB sizes.
Notes:
a. The type of memory required is also indicated in text near the logo on
the system board.
b. System memory as reported in the “System Summary” section of the
Setup Utility or by the operating system might be less than the amount of
physical memory installed. This discrepancy is due to memory
addressing limitations of the Intel 915G Family chipset and is usually not
visable until more than 3GB of memory is installed.
To install a memory module:
1. Remove the computer cover. See “Removing the cover” on page 10.
2. Locate the memory module connectors. See “Identifying parts on the system
board” on page 11.
3. Pivot or open the retaining clips for the connector where you are installing the
memory module.
4. Ensure that the notch on the new memory module 1aligns correctly with the
connector key 2 on the system board. Push the memory module 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 24.
Chapter 1. Installing options 13