Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A55 vs Lenovo ThinkCentre M55

80specifications compared
26differ
54identical
16known for one product only

Key differences

Processor family
- ThinkCentre A55:Intel® Pentium® D
- ThinkCentre M55:Intel® Core™2 Duo
Processor model
- ThinkCentre A55:915
- ThinkCentre M55:E6300
Processor frequency
- ThinkCentre A55:2.8 GHz
- ThinkCentre M55:1.86 GHz
Processor cache
- ThinkCentre A55:4 MB
- ThinkCentre M55:2 MB
Processor front side bus
- ThinkCentre A55:800 MHz
- ThinkCentre M55:1066 MHz
Processor codename
- ThinkCentre A55:Presler
- ThinkCentre M55:Conroe
Thermal Design Power (TDP)
- ThinkCentre A55:95 W
- ThinkCentre M55:65 W
Tcase
- ThinkCentre A55:63.4 °C
- ThinkCentre M55:61.4 °C

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A55, ThinkCentre M55
96 specifications	A Lenovo ThinkCentre A55 View product	B Lenovo ThinkCentre M55 View product
Processor11 differ
Processor familyDiffers	Intel® Pentium® D	Intel® Core™2 Duo
Processor modelDiffers	915	E6300
Processor frequencyDiffers	2.8 GHz	1.86 GHz
Processor cacheDiffers	4 MB	2 MB
Processor front side busDiffers	800 MHz	1066 MHz
Processor seriesKnown for one	Intel Pentium D 900 Series	Unknown — not stated by the source
Processor codenameDiffers	Presler	Conroe
Thermal Design Power (TDP)Differs	95 W	65 W
TcaseDiffers	63.4 °C	61.4 °C
Number of Processing Die TransistorsDiffers	376 M	167 M
Processing Die sizeDiffers	162 mm²	111 mm²
CPU multiplier (bus/core ratio)Differs	14	7
SteppingKnown for one	Unknown — not stated by the source	R0
Memory2 differ
Internal memoryDiffers	0.5 GB	1 GB
Maximum internal memoryDiffers	4 GB	8 GB
Memory slotsKnown for one	2x DIMM	Unknown — not stated by the source
Storage1 differ
Total storage capacityDiffers	160 GB	80 GB
Optical driveidentical
CD read speedKnown for one	48x	Unknown — not stated by the source
CD write speedKnown for one	48x	Unknown — not stated by the source
CD rewrite speedKnown for one	32x	Unknown — not stated by the source
Network1 differ
Networking featuresDiffers	Gigabit Ethernet	Ethernet/Fast Ethernet/Gigabit Ethernet
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	6	10
PS/2 ports quantityKnown for one	2	Unknown — not stated by the source
Serial ports quantityKnown for one	1	Unknown — not stated by the source
Line-outKnown for one	Unknown — not stated by the source	Yes
Line-inKnown for one	Unknown — not stated by the source	Yes
Power1 differ
Power supplyDiffers	280 W	310 W
Designidentical
Cable lock slotKnown for one	Yes	Unknown — not stated by the source
Cable lock slot typeKnown for one	IBM	Unknown — not stated by the source
Software1 differ
Bundled softwareDiffers	Adobe Acrobat Reader, Diskeeper Lite from Diskeeper, Google Desktop, Google Toolbar, Lotus Notes Stand-alone Client, Lotus SmartSuite Millennium edition, PC Doctor diagnostics, Picasa - Google, Symantec Client Security (OEM), ThinkVantage Client Security Software, ThinkVantage Productivity Center, T	Adobe Acrobat Reader, Diskeeper Lite, Google Desktop, Google Toolbar, Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium edition (license), PC Doctor diagnostics, Picasa, Sun JRE, Symantec Client Security (OEM), ThinkVantage Client Security Software, ThinkVantage Productivity Cent
Processor special features3 differ
Intel Virtualization Technology (VT-x)Differs	No	Yes
Physical Address Extension (PAE)Known for one	32 bit	Unknown — not stated by the source
Processor ARK IDDiffers	27515	27248
Thermal Monitoring TechnologiesDiffers	No	Yes
CPU configuration (max)Known for one	Unknown — not stated by the source	1
Processor codeKnown for one	Unknown — not stated by the source	SLGW2
Audio1 differ
Audio systemDiffers	ADI 1986 A	ADI 1983 HD
Weight & dimensions4 differ
WidthDiffers	175 mm	178 mm
DepthDiffers	440 mm	450 mm
HeightDiffers	402 mm	432 mm
WeightDiffers	11 kg	12.5 kg
Other featuresidentical
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.

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