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Memory module
Description Spare part number
4 GB memory module (PC3, 12800, 1600 MHz) 691740-005
8 GB memory module (PC3, 12800, 1600 MHz) 693374-005
NOTE: Before adding memory modules, make sure the computer has the most recent BIOS version, and
update the BIOS if needed. For Windows operating systems, see
Updating the BIOS on page 74.
Before removing a memory module, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 31), and then remove the following components:
a. Optical drive (see
Optical drive on page 32)
b. Top cover (see
Top cover on page 39)
c. Power connector cable (see
Power connector cable on page 63)
d. System board (see
System board on page 52)
Remove the memory module, located on the bottom of the system board:
NOTE: Note the location of the memory module you are removing. If you are replacing it, install the new
memory module in the same slot.
1. Spread the two retaining tabs (1) on each side of the memory module slot to release
the memory module. (The memory module tilts up.)
Component replacement procedures 57