Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A55 + D221 vs Lenovo ThinkCentre M57 Small Desktop (9181-A1G), NL

83specifications compared
25differ
58identical
20known for one product only

Key differences

Processor model
- ThinkCentre A55 + D221:E4500
- ThinkCentre M57 Small Desktop (9181-A1G), NL:E6550
Processor frequency
- ThinkCentre A55 + D221:2.2 GHz
- ThinkCentre M57 Small Desktop (9181-A1G), NL:2.33 GHz
Processor cache
- ThinkCentre A55 + D221:2 MB
- ThinkCentre M57 Small Desktop (9181-A1G), NL:4 MB
Processor front side bus
- ThinkCentre A55 + D221:800 MHz
- ThinkCentre M57 Small Desktop (9181-A1G), NL:1333 MHz
Tcase
- ThinkCentre A55 + D221:73.3 °C
- ThinkCentre M57 Small Desktop (9181-A1G), NL:72 °C
Number of Processing Die Transistors
- ThinkCentre A55 + D221:167 M
- ThinkCentre M57 Small Desktop (9181-A1G), NL:291 M
Processing Die size
- ThinkCentre A55 + D221:111 mm²
- ThinkCentre M57 Small Desktop (9181-A1G), NL:143 mm²
CPU multiplier (bus/core ratio)
- ThinkCentre A55 + D221:11
- ThinkCentre M57 Small Desktop (9181-A1G), NL:7

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A55 + D221, ThinkCentre M57 Small Desktop (9181-A1G), NL
103 specifications	A Lenovo ThinkCentre A55 + D221 View product	B Lenovo ThinkCentre M57 Small Desktop (9181-A1G), NL View product
Processor10 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™2 Duo	Intel® Core™2 Duo
Processor modelDiffers	E4500	E6550
Processor cores	2	2
Processor threads	2	2
Processor frequencyDiffers	2.2 GHz	2.33 GHz
Processor cacheDiffers	2 MB	4 MB
Processor cache type	L2	L2
Processor front side busDiffers	800 MHz	1333 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	65 nm	65 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core 2 Duo E4000 Series	Intel Core 2 Duo E6000 Series
Processor codename	Conroe	Conroe
Thermal Design Power (TDP)	65 W	65 W
TcaseDiffers	73.3 °C	72 °C
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die TransistorsDiffers	167 M	291 M
Processing Die sizeDiffers	111 mm²	143 mm²
CPU multiplier (bus/core ratio)Differs	11	7
Processor core voltage (AC)Known for one	0.85 - 1.5 V	Unknown — not stated by the source
SteppingDiffers	M0	G0
ECC supported by processor	No	No
Number of processors installedKnown for one	Unknown — not stated by the source	1
Memory1 differ
Internal memory	1 GB	1 GB
Maximum internal memory	4 GB	4 GB
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory slotsDiffers	2x DIMM	4x DIMM
Memory layout (slots x size)Known for one	Unknown — not stated by the source	1 x 1 GB
Storage1 differ
Total storage capacity	160 GB	160 GB
Optical drive typeDiffers	DVD±RW	DVD-ROM
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Graphics1 differ
Discrete graphics card modelDiffers	Intel® GMA 3000	Intel® GMA X3100
Performanceidentical
Product type	PC	PC
Networkidentical
Networking features	Gigabit Ethernet	Gigabit Ethernet
Ports & interfaces2 differ
USB 2.0 ports quantityDiffers	8	6
Ethernet LAN (RJ-45) ports	1	1
Headphone outputs	1	1
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	1	1
DVI portKnown for one	Yes	Unknown — not stated by the source
PS/2 ports quantityDiffers	2	1
Serial ports quantity	1	1
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 supplyKnown for one	225 W	Unknown — not stated by the source
Power requirementsKnown for one	Unknown — not stated by the source	115-230V, 50/60Hz
Power availabilityKnown for one	Unknown — not stated by the source	280 W
Design1 differ
Chassis typeDiffers	SFF	Small Desktop
Software1 differ
Operating system installedDiffers	Windows XP Professional	Windows Vista Business
Bundled softwareKnown for one	Unknown — not stated by the source	Yes
Display1 differ
Display includedDiffers	Yes	No
Display diagonalKnown for one	55.9 cm (22")	Unknown — not stated by the source
Display resolutionKnown for one	1680 x 1050 pixels	Unknown — not stated by the source
Contrast ratio (typical)Known for one	700:1	Unknown — not stated by the source
Display brightnessKnown for one	300 cd/m²	Unknown — not stated by the source
Viewing angle, horizontalKnown for one	176°	Unknown — not stated by the source
Viewing angle, verticalKnown for one	176°	Unknown — not stated by the source
DisplayKnown for one	TFT	Unknown — not stated by the source
Processor special features4 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 TechnologyDiffers	No	Yes
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
Processor ARK IDDiffers	30781	30783
Processor codeDiffers	SLA95	SLA9X
Processor package size	37.5 x 37.5 mm	37.5 x 37.5 mm
Thermal Monitoring Technologies	Yes	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
Audio1 differ
Audio systemDiffers	ADI 1986 A	AD1882
Weight & dimensions2 differ
Width	310 mm	310 mm
Depth	358 mm	358 mm
HeightDiffers	85 mm	875 mm
WeightDiffers	8.5 kg	7.42 kg
Expansion slotsidentical
Expansion slotsKnown for one	Unknown — not stated by the source	1x PCI Express 16X LP 1x PCI LP
Packaging contentidentical
Mouse includedKnown for one	Unknown — not stated by the source	Yes
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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