Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A55 + 1GB vs Lenovo ThinkCentre A57

83specifications compared
16differ
67identical
5known for one product only

Key differences

The Lenovo ThinkCentre A57 has 0.2 GHz more processor frequency than the Lenovo ThinkCentre A55 + 1GB (2.4 GHz vs 2.2 GHz). The Lenovo ThinkCentre A57 has 1 more CPU multiplier (bus/core ratio) than the Lenovo ThinkCentre A55 + 1GB (12 vs 11). The Lenovo ThinkCentre A57 has 1 GB more internal memory than the Lenovo ThinkCentre A55 + 1GB (2 GB vs 1 GB). Processor model: E4500 on the Lenovo ThinkCentre A55 + 1GB, E4600 on the Lenovo ThinkCentre A57. Discrete graphics card model: Intel® GMA 3000 on the Lenovo ThinkCentre A55 + 1GB, Intel® GMA 3100 on the Lenovo ThinkCentre A57.

Processor model
- ThinkCentre A55 + 1GB:E4500
- ThinkCentre A57:E4600
Processor frequency
- ThinkCentre A55 + 1GB:2.2 GHz
- ThinkCentre A57:2.4 GHz
CPU multiplier (bus/core ratio)
- ThinkCentre A55 + 1GB:11
- ThinkCentre A57:12
Internal memory
- ThinkCentre A55 + 1GB:1 GB
- ThinkCentre A57:2 GB
Total storage capacity
- ThinkCentre A55 + 1GB:160 GB
- ThinkCentre A57:250 GB
Discrete graphics card model
- ThinkCentre A55 + 1GB:Intel® GMA 3000
- ThinkCentre A57:Intel® GMA 3100
USB 2.0 ports quantity
- ThinkCentre A55 + 1GB:8
- ThinkCentre A57:6
Power supply
- ThinkCentre A55 + 1GB:225 W
- ThinkCentre A57:280 W

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A55 + 1GB, ThinkCentre A57
88 specifications	A Lenovo ThinkCentre A55 + 1GB View product	B Lenovo ThinkCentre A57 View product
Processor3 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™2 Duo	Intel® Core™2 Duo
Processor modelDiffers	E4500	E4600
Processor cores	2	2
Processor threads	2	2
Processor frequencyDiffers	2.2 GHz	2.4 GHz
Processor cache	2 MB	2 MB
Processor cache type	L2	L2
Processor front side bus	800 MHz	800 MHz
Bus type	FSB	FSB
FSB Parity	No	No
Processor lithography	65 nm	65 nm
Processor operating modes	64-bit	64-bit
Processor series	Intel Core 2 Duo E4000 Series	Intel Core 2 Duo E4000 Series
Processor codename	Conroe	Conroe
Thermal Design Power (TDP)	65 W	65 W
Tcase	73.3 °C	73.3 °C
Processor socket	LGA 775 (Socket T)	LGA 775 (Socket T)
Number of Processing Die Transistors	167 M	167 M
Processing Die size	111 mm²	111 mm²
CPU multiplier (bus/core ratio)Differs	11	12
Stepping	M0	M0
ECC supported by processor	No	No
Processor core voltage (AC)Known for one	0.85 - 1.5 V	Unknown — not stated by the source
Memory1 differ
Internal memoryDiffers	1 GB	2 GB
Maximum internal memory	4 GB	4 GB
Internal memory type	DDR2-SDRAM	DDR2-SDRAM
Memory layout (slots x size)Known for one	Unknown — not stated by the source	2 x 1 GB
Memory slots	2x DIMM	2x DIMM
Storage1 differ
Total storage capacityDiffers	160 GB	250 GB
Optical drive type	DVD±RW	DVD±RW
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Graphics1 differ
Discrete graphics card modelDiffers	Intel® GMA 3000	Intel® GMA 3100
Performanceidentical
Product type	PC	PC
Networkidentical
Networking features	Gigabit Ethernet	Gigabit Ethernet
Ports & interfaces1 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
PS/2 ports quantity	2	2
Parallel ports quantity	1	1
Serial ports quantityKnown for one	1	Unknown — not stated by the source
Power1 differ
Power supplyDiffers	225 W	280 W
Power supply input voltageKnown for one	Unknown — not stated by the source	110 - 220 V
Power supply input frequencyKnown for one	Unknown — not stated by the source	50 - 60 Hz
Designidentical
Chassis type	SFF	SFF
Software1 differ
Operating system installedDiffers	Windows XP Professional	Windows Vista Business
Displayidentical
Display included	No	No
Processor special features2 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)	No	No
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	32242
Processor codeDiffers	SLA95	SLA94
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	ALC662
Weight & dimensions4 differ
WidthDiffers	310 mm	317 mm
DepthDiffers	358 mm	355 mm
HeightDiffers	85 mm	99 mm
WeightDiffers	8.5 kg	3.31 kg

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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