Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A51p P4 550 3.4GHz vs Lenovo ThinkCentre M51

31specifications compared
6differ
25identical
44known for one product only

Key differences

Processor frequency
- ThinkCentre A51p P4 550 3.4GHz:3.4 GHz
- ThinkCentre M51:3.2 GHz
Internal memory type
- ThinkCentre A51p P4 550 3.4GHz:DDR2-SDRAM
- ThinkCentre M51:DDR-SDRAM
Total storage capacity
- ThinkCentre A51p P4 550 3.4GHz:160 GB
- ThinkCentre M51:80 GB
Optical drive type
- ThinkCentre A51p P4 550 3.4GHz:DVD-RW
- ThinkCentre M51:DVD-ROM

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A51p P4 550 3.4GHz, ThinkCentre M51
75 specifications	A Lenovo ThinkCentre A51p P4 550 3.4GHz View product	B Lenovo ThinkCentre M51 View product
Processor1 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Pentium® 4	Intel® Pentium® 4
Processor modelKnown for one	550	Unknown — not stated by the source
Processor coresKnown for one	1	Unknown — not stated by the source
Processor frequencyDiffers	3.4 GHz	3.2 GHz
Processor cacheKnown for one	1 MB	Unknown — not stated by the source
Processor cache typeKnown for one	L2	Unknown — not stated by the source
Processor front side bus	800 MHz	800 MHz
Bus typeKnown for one	FSB	Unknown — not stated by the source
FSB ParityKnown for one	No	Unknown — not stated by the source
TcaseKnown for one	72.8 °C	Unknown — not stated by the source
TjunctionKnown for one	100 °C	Unknown — not stated by the source
ECC supported by processorKnown for one	No	Unknown — not stated by the source
Memory1 differ
Internal memory	0.5 GB	0.5 GB
Maximum internal memory	4 GB	4 GB
Internal memory typeDiffers	DDR2-SDRAM	DDR-SDRAM
Storage2 differ
Total storage capacityDiffers	160 GB	80 GB
Optical drive typeDiffers	DVD-RW	DVD-ROM
Storage drive typeKnown for one	SATA	Unknown — not stated by the source
Diskette drive memory	1.44 MB	1.44 MB
HDD interfaceKnown for one	Unknown — not stated by the source	SATA
HDD speedKnown for one	Unknown — not stated by the source	7200 RPM
Graphicsidentical
Discrete graphics card model	Intel® GMA 900	Intel® GMA 900
Video adapter, busKnown for one	PCI Express	Unknown — not stated by the source
Performanceidentical
Product type	PC	PC
Networkidentical
Networking features	Ethernet/Fast Ethernet/Gigabit Ethernet	Ethernet/Fast Ethernet/Gigabit Ethernet
Ports & interfacesidentical
USB 2.0 ports quantity	8	8
Ethernet LAN (RJ-45) ports	1	1
Headphone outputs	1	1
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	1	1
PS/2 ports quantity	2	2
Parallel ports quantity	1	1
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
Poweridentical
Power supply typeKnown for one	110~220V	Unknown — not stated by the source
Power supply	310 W	310 W
Designidentical
Chassis type	Tower	Tower
Software1 differ
Operating system installed	Windows XP Professional	Windows XP Professional
Bundled softwareDiffers	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Lotus SmartSuite Millennium, Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), Norton AntiVirus 2004 OEM Version, PC Doctor diagnostics, ThinkVantage Rescue	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium, Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), Norton AntiVirus 2004 OEM Version, PC Doctor diagnostics, ThinkVantage Rescue and Recovery with Rapid Restore
Displayidentical
Display included	No	No
Processor special featuresidentical
Enhanced Intel SpeedStep TechnologyKnown for one	No	Unknown — not stated by the source
Idle StatesKnown for one	No	Unknown — not stated by the source
Intel Clear Video TechnologyKnown for one	No	Unknown — not stated by the source
Intel Demand Based SwitchingKnown for one	No	Unknown — not stated by the source
Intel Dual Display Capable TechnologyKnown for one	No	Unknown — not stated by the source
Intel Enhanced Halt StateKnown for one	No	Unknown — not stated by the source
Intel FDI TechnologyKnown for one	No	Unknown — not stated by the source
Intel Fast Memory AccessKnown for one	No	Unknown — not stated by the source
Intel Flex Memory AccessKnown for one	No	Unknown — not stated by the source
Intel Rapid Storage TechnologyKnown for one	No	Unknown — not stated by the source
Intel Trusted Execution TechnologyKnown for one	No	Unknown — not stated by the source
Intel VT-x with Extended Page Tables (EPT)Known for one	No	Unknown — not stated by the source
Intel Virtualization Technology (VT-x)Known for one	No	Unknown — not stated by the source
Intel Virtualization Technology for Directed I/O (VT-d)Known for one	No	Unknown — not stated by the source
Intel® AES New Instructions (Intel® AES-NI)Known for one	No	Unknown — not stated by the source
Intel® Clear Video HD Technology (Intel® CVT HD)Known for one	No	Unknown — not stated by the source
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)Known for one	No	Unknown — not stated by the source
Intel® InTru™ 3D TechnologyKnown for one	No	Unknown — not stated by the source
Intel® Insider™Known for one	No	Unknown — not stated by the source
Intel® Wireless Display (Intel® WiDi)Known for one	No	Unknown — not stated by the source
Thermal Monitoring TechnologiesKnown for one	No	Unknown — not stated by the source
Intel® Turbo Boost TechnologyKnown for one	No	Unknown — not stated by the source
Intel® Quick Sync Video TechnologyKnown for one	No	Unknown — not stated by the source
Intel® My WiFi Technology (Intel® MWT)Known for one	No	Unknown — not stated by the source
Intel® Anti-Theft Technology (Intel® AT)Known for one	No	Unknown — not stated by the source
Conflict-Free processorKnown for one	No	Unknown — not stated by the source
Audioidentical
Audio system	SoundMAX Cadenza	SoundMAX Cadenza
Weight & dimensionsidentical
Width	175 mm	175 mm
Depth	450 mm	450 mm
Height	492 mm	492 mm
Weight	13.5 kg	13.5 kg
Other features1 differ
Security featuresDiffers	-Parallel port I/O control -Power on password -Secure Data Disposal -Serial port I/O control -Kensington Lock Standard Enabled -Embedded Security Subsystem standard -Diskette boot inhibit -Diskette I/O control -Hard disk drive password -Hardfile I/O control -Configuration password -Boot sequence con	-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -Diskette I/O control -Hard disk drive password -Hard drive I/O control -Padlock loop -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control
Intel segment taggingKnown for one	Unknown — not stated by the source	Enterprise, Professional
Optical driveidentical
DVD read speedKnown for one	Unknown — not stated by the source	16x

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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