Lenovo ThinkCentre A55 User Manual - Page 35

Expansion, Power, Security, features, Preinstalled, software, Operating, systems, preinstalled - audio driver

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v Six USB connectors (two on front panel and four on rear panel) v Standard mouse connector v Standard keyboard connector v Ethernet connector v VGA monitor connector v Three audio connectors (line in, line out, and microphone) on rear panel v Two audio connectors (microphone and headphone) on front panel Expansion v Three drive bays v Two low-profile 32-bit PCI adapter connectors v One low-profile PCI Express x1 adapter connector v One low-profile PCI Express x16 graphics adapter connector Power v 180 Watt power supply with manual voltage selection switch (some models) v 220 Watt power supply with manual voltage selection switch (some models) v Automatic 50/60 Hz input frequency switching v Advanced Power Management support v Advanced Configuration and Power Interface (ACPI) support Security features v User and administrator passwords for BIOS access v Support for the addition of a padlock to secure the computer cover v Support for the addition of an integrated cable lock (Kensington lock) to secure the computer cover v Startup sequence control v Startup without diskette drive, keyboard, or mouse v Unattended start mode v Diskette and hard disk I/O control v Serial and parallel port I/O control Preinstalled software Your computer might come with preinstalled software. If it does, an operating system, device drivers to support built-in features, and other support programs are included. Operating systems, preinstalled (varies by model) Note: Not all countries or regions have these operating systems. v Microsoft Windows XP Home v Microsoft Windows XP Professional v Microsoft Windows Vista™ Chapter 3. Installing options 15

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v
Six
USB
connectors
(two
on
front
panel
and
four
on
rear
panel)
v
Standard
mouse
connector
v
Standard
keyboard
connector
v
Ethernet
connector
v
VGA
monitor
connector
v
Three
audio
connectors
(line
in,
line
out,
and
microphone)
on
rear
panel
v
Two
audio
connectors
(microphone
and
headphone)
on
front
panel
Expansion
v
Three
drive
bays
v
Two
low-profile
32-bit
PCI
adapter
connectors
v
One
low-profile
PCI
Express
x1
adapter
connector
v
One
low-profile
PCI
Express
x16
graphics
adapter
connector
Power
v
180
Watt
power
supply
with
manual
voltage
selection
switch
(some
models)
v
220
Watt
power
supply
with
manual
voltage
selection
switch
(some
models)
v
Automatic
50/60
Hz
input
frequency
switching
v
Advanced
Power
Management
support
v
Advanced
Configuration
and
Power
Interface
(ACPI)
support
Security
features
v
User
and
administrator
passwords
for
BIOS
access
v
Support
for
the
addition
of
a
padlock
to
secure
the
computer
cover
v
Support
for
the
addition
of
an
integrated
cable
lock
(Kensington
lock)
to
secure
the
computer
cover
v
Startup
sequence
control
v
Startup
without
diskette
drive,
keyboard,
or
mouse
v
Unattended
start
mode
v
Diskette
and
hard
disk
I/O
control
v
Serial
and
parallel
port
I/O
control
Preinstalled
software
Your
computer
might
come
with
preinstalled
software.
If
it
does,
an
operating
system,
device
drivers
to
support
built-in
features,
and
other
support
programs
are
included.
Operating
systems,
preinstalled
(varies
by
model)
Note:
Not
all
countries
or
regions
have
these
operating
systems.
v
Microsoft
Windows
XP
Home
v
Microsoft
Windows
XP
Professional
v
Microsoft
Windows
Vista
™
Chapter
3.
Installing
options
15