Lenovo ThinkCentre M55 User Manual - Page 40

Installing, memory

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Installing memory Your computer has four connectors for installing double date rate 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 DIMMs in any combination (up to 8.0GB). Note: Only DDR2 SDRAM DIMMs can be used. To install a memory module: 1. Open the computer cover. See "Opening the cover" on page 21. 2. Pivot the drive bay assembly upward. 3. Locate the memory connectors. See "Identifying parts on the system board" on page 23. 24 User Guide

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Installing
memory
Your
computer
has
four
connectors
for
installing
double
date
rate
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
DIMMs
in
any
combination
(up
to
8.0GB).
Note:
Only
DDR2
SDRAM
DIMMs
can
be
used.
To
install
a
memory
module:
1.
Open
the
computer
cover.
See
“Opening
the
cover”
on
page
21.
2.
Pivot
the
drive
bay
assembly
upward.
3.
Locate
the
memory
connectors.
See
“Identifying
parts
on
the
system
board”
on
page
23.
24
User
Guide