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 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
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 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
HDD interfaceKnown for one	Unknown — not stated by the source	SATA
HDD speedKnown for one	Unknown — not stated by the source	7200 RPM
Graphicsidentical
Video adapter, busKnown for one	PCI Express	Unknown — not stated by the source
Ports & interfacesidentical
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
Software1 differ
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
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
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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