Primary memory module
NOTE: There are two memory slots. Expansion memory is installed in a compartment containing a
single slot (slot 2) on the bottom of the computer and the primary memory is installed in a compartment
containing a single slot (slot 1) under the keyboard.
Slot 2 cannot be populated if slot 1 is not populated.
Description Spare part number
1-GB (PC3-10600, 1333-MHz, DDR3) 639736-001
2-GB (PC3-10600, 1333-MHz, DDR3) 621565-001
4-GB (PC3-10600, 1333-MHz, DDR3) 621569-001
8-GB (PC3-10600, 1333-MHz, DDR3) 634091-001
Before removing the primary memory module, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 50).
5. Remove the keyboard (see
Keyboard on page 66).
Remove the primary memory module:
1. Spread the retaining tabs (1) on each side of the primary memory module slot to release the
memory module. (The edge of the module opposite the slot rises away from the computer.)
74 Chapter 4 Removal and replacement procedures
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