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Adding or replacing memory modules
The computer has two memory module compartments. One memory module compartment is located
underneath the keyboard (primary), and the other is located underneath the bottom cover
(expansion). The capacity of the computer can be upgraded by: adding a memory module to the
vacant primary memory module slot; adding a memory module to the vacant expansion memory
module slot; or by upgrading the existing memory module in the primary memory module slot.
NOTE: Computers with dual core processors have 2 slots (1 primary and 1 expansion). Computers
with quad core processors have 4 slots (2 primary and 2 expansion).
For all models:
● To upgrade the existing memory module in the primary memory module slot, see
Adding or
replacing the primary memory module underneath the keyboard on page 45.
●
To add or upgrade expansion memory to your computer, see
Adding or replacing the expansion
memory module underneath the bottom cover on page 43.
WARNING! To reduce the risk of electric shock and damage to the equipment, unplug the power
cord and remove all batteries before installing a memory module.
CAUTION: Electrostatic discharge (ESD) can damage electronic components. Before beginning
any procedure, ensure that you are discharged of static electricity by touching a grounded metal
object.
NOTE: To use a dual-channel configuration when adding a second memory module, be sure that
both memory modules are identical.
Adding or replacing the expansion memory module underneath the
bottom cover
CAUTION: To prevent information loss or an unresponsive system:
Shut down the computer before adding or replacing memory modules. Do not remove a memory
module while the computer is on, in the Sleep state, or in Hibernation.
If you are not sure whether the computer is off or in Hibernation, turn the computer on by pressing the
power button. Then shut down the computer through the operating system.
To add or replace the expansion memory module underneath the bottom cover:
1. Save your work and shut down the computer.
2. Disconnect AC power and external devices connected to the computer.
3. Turn the computer upside down on a flat surface, with the battery bay away from you.
4. Remove the battery (see
Inserting or removing the battery on page 32).
5. Remove the bottom cover (see
Removing or replacing the bottom cover on page 34).
6. If you are replacing a memory module, remove the existing memory module:
a. Pull away the retention clips (1) on each side of the memory module.
The memory module tilts up.
Adding or replacing memory modules 43