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 manufacturer	Intel	Intel
Processor familyDiffers	Intel® Pentium® D	Intel® Core™2 Duo
Processor modelDiffers	915	E6300
Processor cores	2	2
Processor threads	2	2
Processor frequencyDiffers	2.8 GHz	1.86 GHz
Processor cacheDiffers	4 MB	2 MB
Processor cache type	L2	L2
Processor front side busDiffers	800 MHz	1066 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	65 nm	65 nm
Processor operating modes	64-bit	64-bit
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
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die TransistorsDiffers	376 M	167 M
Processing Die sizeDiffers	162 mm²	111 mm²
CPU multiplier (bus/core ratio)Differs	14	7
ECC supported by processor	No	No
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
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory slotsKnown for one	2x DIMM	Unknown — not stated by the source
Storage1 differ
Total storage capacityDiffers	160 GB	80 GB
Optical drive type	DVD-ROM	DVD-ROM
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Graphicsidentical
Discrete graphics card model	Intel® GMA 3000	Intel® GMA 3000
Performanceidentical
Product type	PC	PC
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
DVD read speed	16x	16x
Network1 differ
Networking featuresDiffers	Gigabit Ethernet	Ethernet/Fast Ethernet/Gigabit Ethernet
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	6	10
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 quantityKnown for one	2	Unknown — not stated by the source
Serial ports quantityKnown for one	1	Unknown — not stated by the source
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
Power1 differ
Power supplyDiffers	280 W	310 W
Designidentical
Chassis type	Tower	Tower
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
Operating system installed	Windows XP Professional	Windows XP Professional
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
Displayidentical
Display included	No	No
Processor special features3 differ
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Intel 64	Yes	Yes
Intel Clear Video Technology	No	No
Intel Demand Based Switching	No	No
Intel Dual Display Capable Technology	No	No
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	No	No
Intel Fast Memory Access	No	No
Intel Flex Memory Access	No	No
Intel Rapid Storage Technology	No	No
Intel Trusted Execution Technology	No	No
Intel VT-x with Extended Page Tables (EPT)	No	No
Intel Virtualization Technology (VT-x)Differs	No	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	No	No
Intel® AES New Instructions (Intel® AES-NI)	No	No
Intel® Clear Video HD Technology (Intel® CVT HD)	No	No
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® InTru™ 3D Technology	No	No
Intel® Insider™	No	No
Intel® Wireless Display (Intel® WiDi)	No	No
Physical Address Extension (PAE)Known for one	32 bit	Unknown — not stated by the source
Processor ARK IDDiffers	27515	27248
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Thermal Monitoring TechnologiesDiffers	No	Yes
Intel® Turbo Boost Technology	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)	No	No
Intel® Quick Sync Video Technology	No	No
Intel® My WiFi Technology (Intel® MWT)	No	No
Intel® Anti-Theft Technology (Intel® AT)	No	No
Conflict-Free processor	No	No
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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