Lenovo ThinkCentre M55 User Manual

Note: Selecting a startup device from the Startup Device menu does not
permanently change the startup sequence.
Changing the startup device sequence
To view or permanently change the configured startup device sequence, do the
following:
1. Start the Setup Utility program (see “Starting the Setup Utility program” on
page 49).
2. Select Startup.
3. Select Startup Sequence. See the information displayed on the right side of the
screen.
4. Select the devices for the Primary Startup Sequence, the Automatic Startup
Sequence, and the Error Startup Sequence.
5. Select Exit from the Setup Utility menu and then Save Settings or Save and
exit the Setup Utility.
If you have changed these settings and want to return to the default settings, select
Load Default Settings on the Exit menu.
Advanced settings
On some computer models the Advanced settings menu includes a setting to
Enable/Disable HyperThreading. This feature works only with
HyperThreading-aware operating systems such as Microsoft Windows XP. The
default setting for HyperThreading is Enabled. However, if you select Set Defaults
and are using an operating system other than Windows XP, your computer
performance might be degraded. Therefore, you should always set
HyperThreading to Disabled unless you are sure your operating system supports
HyperThreading.
Exiting from the Setup Utility program
When you finish viewing or changing settings, press Esc to return to the Setup
Utility program menu (you might have to press Esc several times). If you want to
save the new settings, select Save Settings or Save and exit the Setup Utility.
Otherwise, your changes will not be saved.
Chapter 5. Using the Setup Utility 51

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