Product comparison · 2 laptops

Lenovo T420 Win 7 US vs Lenovo W520 DOS US

136specifications compared
35differ
101identical
5known for one product only

Key differences

Display diagonal
- T420 Win 7 US:35.6 cm (14")
- W520 DOS US:39.6 cm (15.6")
Display resolution
- T420 Win 7 US:1600 x 900 pixels
- W520 DOS US:1920 x 1080 pixels
HD type
- T420 Win 7 US:HD+
- W520 DOS US:Full HD
Processor model
- T420 Win 7 US:i7-2620M
- W520 DOS US:i7-2720QM
Processor cores
- T420 Win 7 US:2
- W520 DOS US:4
Processor threads
- T420 Win 7 US:4
- W520 DOS US:8
Processor boost frequency
- T420 Win 7 US:3.4 GHz
- W520 DOS US:3.3 GHz
Processor frequency
- T420 Win 7 US:2.7 GHz
- W520 DOS US:2.2 GHz

Side by side

Differences highlightedShow differences only

Comparison of T420 Win 7 US, W520 DOS US
141 specifications	A Lenovo T420 Win 7 US View product	B Lenovo W520 DOS US View product
Display3 differ
Display diagonalDiffers	35.6 cm (14")	39.6 cm (15.6")
Display resolutionDiffers	1600 x 900 pixels	1920 x 1080 pixels
HD typeDiffers	HD+	Full HD
Processor13 differ
Processor modelDiffers	i7-2620M	i7-2720QM
Processor coresDiffers	2	4
Processor threadsDiffers	4	8
Processor boost frequencyDiffers	3.4 GHz	3.3 GHz
Processor frequencyDiffers	2.7 GHz	2.2 GHz
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
Processor cacheDiffers	4 MB	6 MB
Processor socketDiffers	BGA 1023	Socket 1224
Processor seriesDiffers	Intel Core i7-2600 Mobile Series	Intel Core i7-2700 Mobile Series
SteppingDiffers	J1	D2
Thermal Design Power (TDP)Differs	35 W	45 W
TjunctionDiffers	100 °C	100 C
PCI Express configurationsDiffers	1x16, 2x8, 1x8+2x4	1x16, 2x8
CPU multiplier (bus/core ratio)Differs	27	22
Memory3 differ
Internal memoryDiffers	4 GB	8 GB
Memory slotsDiffers	2x SO-DIMM	4x SO-DIMM
Maximum internal memoryDiffers	16 GB	32 GB
Graphics1 differ
Discrete graphics card modelDiffers	NVIDIA® NVS™ 4200M	NVIDIA® Quadro® 2000M
Networkidentical
WWANKnown for one	Unknown — not stated by the source	Installed
Ports & interfaces5 differ
USB 2.0 ports quantityDiffers	3	1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	0	2
DisplayPorts quantityDiffers	1	0
Firewire (IEEE 1394) portsDiffers	0	1
Docking connectorDiffers	No	Yes
Modem (RJ-11) portsKnown for one	1	Unknown — not stated by the source
Software1 differ
Operating system installedDiffers	Windows 7 Professional	FreeDOS
Operating system architectureKnown for one	64-bit	Unknown — not stated by the source
Processor special features3 differ
Processor ARK IDDiffers	52231	50067
Processor codeDiffers	SR041	SR00W
Processor package sizeDiffers	37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023)	37.5 x 37.5 (rPGA988B); 31.0 x 24.0 (BGA1224)
Weight & dimensions5 differ
WeightDiffers	2.35 kg	2.85 kg
WidthDiffers	341 mm	373 mm
DepthDiffers	258 mm	270 mm
Height (front)Differs	3 cm	3.3 cm
Height (rear)Differs	3.1 cm	3.7 cm
Other features1 differ
Intel segment taggingDiffers	Home office, Small Business	Professional
Internal modemKnown for one	Unknown — not stated by the source	No

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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