Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A51 Pentium 4 630 3GHz vs Lenovo ThinkCentre M51 P4 540 HT 512MB 80GB XPP

33specifications compared
11differ
22identical
55known for one product only

Key differences

Processor frequency
- ThinkCentre A51 Pentium 4 630 3GHz:3 GHz
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:3.2 GHz
Internal memory
- ThinkCentre A51 Pentium 4 630 3GHz:0.25 GB
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:0.5 GB
Maximum internal memory
- ThinkCentre A51 Pentium 4 630 3GHz:2 GB
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:4 GB
Power supply
- ThinkCentre A51 Pentium 4 630 3GHz:225 W
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:310 W
Chassis type
- ThinkCentre A51 Pentium 4 630 3GHz:SFF
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:Tower
Width
- ThinkCentre A51 Pentium 4 630 3GHz:309 mm
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:175 mm
Depth
- ThinkCentre A51 Pentium 4 630 3GHz:345 mm
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:450 mm
Height
- ThinkCentre A51 Pentium 4 630 3GHz:84 mm
- ThinkCentre M51 P4 540 HT 512MB 80GB XPP:492 mm

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A51 Pentium 4 630 3GHz, ThinkCentre M51 P4 540 HT 512MB 80GB XPP
88 specifications	A Lenovo ThinkCentre A51 Pentium 4 630 3GHz View product	B Lenovo ThinkCentre M51 P4 540 HT 512MB 80GB XPP View product
Processor1 differ
Processor modelKnown for one	630	Unknown — not stated by the source
Processor coresKnown for one	1	Unknown — not stated by the source
Processor threadsKnown for one	2	Unknown — not stated by the source
Processor frequencyDiffers	3 GHz	3.2 GHz
Processor cacheKnown for one	2 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
Processor lithographyKnown for one	90 nm	Unknown — not stated by the source
Processor operating modesKnown for one	64-bit	Unknown — not stated by the source
Processor seriesKnown for one	Intel Pentium 4 600 Series supporting Hyper-Threading Technology	Unknown — not stated by the source
Processor codenameKnown for one	Prescott	Unknown — not stated by the source
Thermal Design Power (TDP)Known for one	84 W	Unknown — not stated by the source
TcaseKnown for one	66.6 °C	Unknown — not stated by the source
Processor socketKnown for one	LGA 775 (Socket T)	Unknown — not stated by the source
Number of Processing Die TransistorsKnown for one	169 M	Unknown — not stated by the source
Processing Die sizeKnown for one	135 mm²	Unknown — not stated by the source
CPU multiplier (bus/core ratio)Known for one	15	Unknown — not stated by the source
ECC supported by processorKnown for one	No	Unknown — not stated by the source
Memory2 differ
Internal memoryDiffers	0.25 GB	0.5 GB
Maximum internal memoryDiffers	2 GB	4 GB
Storageidentical
HDD interfaceKnown for one	SATA	Unknown — not stated by the source
HDD speedKnown for one	7200 RPM	Unknown — not stated by the source
Storage drive typeKnown for one	Unknown — not stated by the source	SATA
Graphicsidentical
Video adapter resolutionKnown for one	2048x1536 16777216 colors	Unknown — not stated by the source
Power1 differ
Power supplyDiffers	225 W	310 W
Design1 differ
Chassis typeDiffers	SFF	Tower
Software1 differ
Bundled softwareDiffers	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), ThinkVantage Rescue and Recovery with Rapid Restore, Norton AntiVirus 2004 OEM Version, PC Doctor diagnosti	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
Processor special featuresidentical
Embedded options availableKnown for one	No	Unknown — not stated by the source
Enhanced Intel SpeedStep TechnologyKnown for one	Yes	Unknown — not stated by the source
Execute Disable BitKnown for one	Yes	Unknown — not stated by the source
Idle StatesKnown for one	No	Unknown — not stated by the source
Intel 64Known for one	Yes	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
Processor ARK IDKnown for one	27478	Unknown — not stated by the source
Processor package sizeKnown for one	37.5 x 37.5 mm	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® Hyper Threading Technology (Intel® HT Technology)Known for one	Yes	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
Weight & dimensions4 differ
WidthDiffers	309 mm	175 mm
DepthDiffers	345 mm	450 mm
HeightDiffers	84 mm	492 mm
WeightDiffers	8.5 kg	13.5 kg
Other features1 differ
Security featuresDiffers	-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -Diskette I/O control -Hard disk drive password -Hard drive I/O control -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control -U-Bolt anchoring featu	-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

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.

More pcs/workstations comparisons

All pcs/workstations comparisons