Lenovo ThinkCentre M55 User Manual

shorten the life of the battery and can also pose a safety hazard. Do not let
rechargeable Lithium-Ion batteries completely discharge or store these batteries in a
discharged state.
Heat and product ventilation
Computers generate heat when turned on and when batteries are charging.
Notebook computers can generate a significant amount of heat due to their
compact size. Always follow these basic precautions:
v Do not leave the base of your notebook computer in contact with your lap or
any part of your body for an extended period when the computer is functioning
or when the battery is charging. Your computer produces some heat during
normal operation. Extended contact with the body could cause discomfort or,
potentially, a skin burn.
v Do not operate your computer or charge the battery near flammable materials or
in explosive environments.
v Ventilation slots, fans and/or heat sinks are provided with the product for safety,
comfort, and reliable operation. These features might inadvertently become
blocked by placing the product on a bed, sofa, carpet, or other flexible surface.
Never block, cover or disable these features.
You
should inspect your desktop computer for dust accumulation at least once
every three months. Before inspecting your computer, turn off the power and
unplug the computer’s power cord from the electrical outlet; then remove any dust
from vents and perforations in the bezel. If you notice external dust accumulation,
you should also examine and remove dust from the inside of the computer
including heat sink inlet fins, power supply vents, and fans. Always turn off and
unplug the computer before opening the cover. If possible, avoid operating your
computer within 2 feet of high-traffic areas. If you must operate your computer in
or near a high-traffic area, you should inspect and, if necessary, clean your
computer more frequently.
For your safety and to maintain optimum computer performance, always follow
these basic precautions with your desktop computer:
v Keep the cover closed whenever the computer is plugged in.
v Regularly inspect the outside of the computer for dust accumulation.
v Remove dust from vents and any perforations in the bezel. More frequent
cleanings might be required for computers in dusty or high-traffic areas.
v Do not restrict or block any ventilation openings.
v Do not store or operate your computer inside furniture, as this might increase
the risk of overheating.
v Airflow temperatures into the computer should not exceed 35° C (95° F).
v Do not use non-desktop air filtration devices.
CD and DVD drive safety
CD and DVD drives spin discs at a high speed. If a CD or DVD is cracked or
otherwise physically damaged, it is possible for the disc to break apart or even
shatter when the CD and DVD drives are in use. To protect against possible injury
due to this situation, and to reduce the risk of damage to your machine, do the
following:
v Always store CD and DVD discs in their original packaging.
v Always store CD and DVD discs out of direct sunlight and away from direct
heat sources.
Important safety information ix

Lenovo ThinkCentre M55 Specifications

General

Tcase	61.4 °C
Bus type	FSB
Stepping	R0
Processor cache	2 MB
Processor cores	2
Processor model	E6300
System bus rate	- GT/s
Processor family	Intel® Core™2 Duo
Processor socket	LGA 775 (Socket T)
Processor codename	Conroe
Processing Die size	111 mm²
Processor frequency	1.86 GHz
Processor cache type	L2
Processor lithography	65 nm
Processor manufacturer	Intel
Processor front side bus	1066 MHz
Processor operating modes	64-bit
ECC supported by processor	No
Thermal Design Power (TDP)	65 W
Number of processors installed	1
CPU multiplier (bus/core ratio)	7
Number of Processing Die Transistors	167 M
Audio system	High Definition Audio
Product type	PC
Motherboard chipset	Intel® Q963 Express
Memory slots	2x DIMM
Internal memory	1 GB
Memory clock speed	667 MHz
Internal memory type	DDR2-SDRAM
Maximum internal memory	4 GB
Memory layout (slots x size)	2 x 0.5 GB
HDD speed	7200 RPM
HDD interface	SATA
Optical drive type	DVD-ROM
Total storage capacity	80 GB
Power supply type	AC
Power requirements	120 - 230 V
External drive bays	1 x 5.25\
Internal drive bays	1 x 3.5\
Networking features	Gigabit Ethernet
Intel segment tagging	Enterprise, Professional
Compliance industry standards	IEEE802.3, IEEE802.3u, IEEE802.3ab
On-board graphics card	Yes
Discrete graphics card model	Intel® GMA 3000
Maximum graphics card memory	- GB
Operating system installed	Windows Vista Business
USB 2.0 ports quantity	8
Firewire (IEEE 1394) ports	0
Cabling technology	10/100/1000Base-T(X)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Power supply	225 W
Chassis type	SFF
Product color	Black
Processor code	SLGW2
Processor ARK ID	27248
Processor package size	37.5 x 37.5 mm

Weight and Dimensions

Depth	358 mm
Width	310 mm
Height	88 mm
Weight	8500 g