Memory module
Description Spare part number
4 GB memory module (PC3, 12800, 1600 MHz) 691740-001
2 GB memory module (PC3, 12800, 1600 MHz) 691739-001
8 GB memory module (PC3, 12800, 1600 MHz) 693374-001
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 105; for Linux Ubuntu, see Updating the BIOS on page 110.
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 49).
5. Remove the service door (see
Service door on page 50).
Remove the memory module:
NOTE: Note the location of the memory module (1) 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
51
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General
Weight and Dimensions
