Lenovo ThinkCentre E51 User Manual - Page 31

Installing, memory

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The following illustration shows the locations of parts on the system board for some models. 1 Microprocessor and heat sink 2 Microprocessor fan connector 3 Memory connector 1 4 Memory connector 2 5 Memory connector 3 6 Memory connector 4 7 Power connector 8 IDE connector 9 Diskette drive connector 10 SATA connectors (4) 11 Clear CMOS/Recovery jumper 12 Front panel connector 13 Front USB connectors (2) 14 Battery 15 PCI Express x1 adapter connector 16 Serial (COM2) connector 17 Front audio connector 18 PCI adapter connectors 19 PCI Express x16 adapter connector (some models) 20 System fan 21 12v power connector Installing memory Your computer has two or four connectors for installing DIMMs. Each DIMM can be a maximum of 1GB providing up to a maximum of 2.0 GB or 4.0 GB of system memory. When installing memory modules, the following rules apply: v Use 2.5 V, 184-pin double data rate synchronous dynamic random access memory (DDR SDRAM). (some models) v Use 1.8 V, 240-pin DDR2 SDRAM. (some models) v Use 128 MB, 256 MB, 512 MB or 1.0 GB memory modules in any combination. Chapter 1. Installing options 15

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The
following
illustration
shows
the
locations
of
parts
on
the
system
board
for
some
models.
±1²
Microprocessor
and
heat
sink
±12²
Front
panel
connector
±2²
Microprocessor
fan
connector
±13²
Front
USB
connectors
(2)
±3²
Memory
connector
1
±14²
Battery
±4²
Memory
connector
2
±15²
PCI
Express
x1
adapter
connector
±5²
Memory
connector
3
±16²
Serial
(COM2)
connector
±6²
Memory
connector
4
±17²
Front
audio
connector
±7²
Power
connector
±18²
PCI
adapter
connectors
±8²
IDE
connector
±19²
PCI
Express
x16
adapter
connector
(some
models)
±9²
Diskette
drive
connector
±20²
System
fan
±10²
SATA
connectors
(4)
±21²
12v
power
connector
±11²
Clear
CMOS/Recovery
jumper
Installing
memory
Your
computer
has
two
or
four
connectors
for
installing
DIMMs.
Each
DIMM
can
be
a
maximum
of
1GB
providing
up
to
a
maximum
of
2.0
GB
or
4.0
GB
of
system
memory.
When
installing
memory
modules,
the
following
rules
apply:
v
Use
2.5
V,
184-pin
double
data
rate
synchronous
dynamic
random
access
memory
(DDR
SDRAM).
(some
models)
v
Use
1.8
V,
240-pin
DDR2
SDRAM.
(some
models)
v
Use
128
MB,
256
MB,
512
MB
or
1.0
GB
memory
modules
in
any
combination.
Chapter
1.
Installing
options
15