Lenovo M55e User Manual - Page 42

Installing, memory

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Installing memory Your computer has two connectors for installing double date rate 2 dual inline memory modules (DDR2 DIMMs) that provide up to a maximum of 4.0 GB of system memory. When installing memory modules, the following rules apply: v Use 1.8 V, 240-pin, double data rate 2 synchronous dynamic random access memory (DDR2 SDRAM). v Use 256 MB, 512 MB, 1.0 GB, or 2.0 GB memory modules in any combination up to a maximum of 4.0 GB. Note: Only DDR2 SDRAM DIMMs can be used. To install a memory module: 1. Open the computer cover. See "Opening the cover" on page 20. 2. Access the system board. See "Accessing system board components and drives" on page 22. 3. Locate the memory connectors. See "Identifying parts on the system board" on page 23. 4. Open the retaining clips. 5. Position the memory module over the memory connector. Make sure that the notch 1 on the memory module 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. 6. Reinstall the PCI riser assembly if it was removed. 24 User Guide

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Installing
memory
Your
computer
has
two
connectors
for
installing
double
date
rate
2
dual
inline
memory
modules
(DDR2
DIMMs)
that
provide
up
to
a
maximum
of
4.0
GB
of
system
memory.
When
installing
memory
modules,
the
following
rules
apply:
v
Use
1.8
V,
240-pin,
double
data
rate
2
synchronous
dynamic
random
access
memory
(DDR2
SDRAM).
v
Use
256
MB,
512
MB,
1.0
GB,
or
2.0
GB
memory
modules
in
any
combination
up
to
a
maximum
of
4.0
GB.
Note:
Only
DDR2
SDRAM
DIMMs
can
be
used.
To
install
a
memory
module:
1.
Open
the
computer
cover.
See
“Opening
the
cover”
on
page
20.
2.
Access
the
system
board.
See
“Accessing
system
board
components
and
drives”
on
page
22.
3.
Locate
the
memory
connectors.
See
“Identifying
parts
on
the
system
board”
on
page
23.
4.
Open
the
retaining
clips.
5.
Position
the
memory
module
over
the
memory
connector.
Make
sure
that
the
notch
±1²
on
the
memory
module
aligns
correctly
with
the
connector
key
±2²
on
the
system
board.
Push
the
memory
module
straight
down
into
the
connector
until
the
retaining
clips
close.
6.
Reinstall
the
PCI
riser
assembly
if
it
was
removed.
24
User
Guide