Product comparison · 2 laptops

Lenovo L520 + 45N6678 vs Lenovo T420 + ThinkPad Mini Dock Series 3 (EU)

128specifications compared
15differ
113identical
15known for one product only

Key differences

Display diagonal
- L520 + 45N6678:39.6 cm (15.6")
- T420 + ThinkPad Mini Dock Series 3 (EU):35.6 cm (14")
Display brightness
- L520 + 45N6678:220 cd/m²
- T420 + ThinkPad Mini Dock Series 3 (EU):200 cd/m²
Contrast ratio (typical)
- L520 + 45N6678:500:1
- T420 + ThinkPad Mini Dock Series 3 (EU):300:1
HDD speed
- L520 + 45N6678:5400 RPM
- T420 + ThinkPad Mini Dock Series 3 (EU):7200 RPM
Optical drive type
- L520 + 45N6678:DVD±RW
- T420 + ThinkPad Mini Dock Series 3 (EU):DVD-RW
Discrete graphics card
- L520 + 45N6678:No
- T420 + ThinkPad Mini Dock Series 3 (EU):Yes
Discrete graphics card model
- L520 + 45N6678:Not available
- T420 + ThinkPad Mini Dock Series 3 (EU):Intel® HD Graphics 3000
Speaker power
- L520 + 45N6678:1.5 W
- T420 + ThinkPad Mini Dock Series 3 (EU):1 W

Side by side

Differences highlightedShow differences only

Comparison of L520 + 45N6678, T420 + ThinkPad Mini Dock Series 3 (EU)
143 specifications	A Lenovo L520 + 45N6678 View product	B Lenovo T420 + ThinkPad Mini Dock Series 3 (EU)View product
Display3 differ
Display diagonalDiffers	39.6 cm (15.6")	35.6 cm (14")
Display brightnessDiffers	220 cd/m²	200 cd/m²
Contrast ratio (typical)Differs	500:1	300:1
Memoryidentical
Memory layout (slots x size)Known for one	Unknown — not stated by the source	2 x 2 GB
Storage2 differ
Storage mediaKnown for one	HDD	Unknown — not stated by the source
Number of HDDs installedKnown for one	1	Unknown — not stated by the source
HDD speedDiffers	5400 RPM	7200 RPM
Optical drive typeDiffers	DVD±RW	DVD-RW
Graphics2 differ
Discrete graphics cardDiffers	No	Yes
Discrete graphics card modelDiffers	Not available	Intel® HD Graphics 3000
Audio1 differ
Speaker powerDiffers	1.5 W	1 W
Built-in microphoneKnown for one	Yes	Unknown — not stated by the source
Networkidentical
Wi-Fi standardsKnown for one	802.11b, 802.11g, Wi-Fi 4 (802.11n)	Unknown — not stated by the source
Bluetooth versionKnown for one	3.0+HS	Unknown — not stated by the source
Cabling technologyKnown for one	10/100/1000Base-T(X)	Unknown — not stated by the source
Networking featuresKnown for one	Unknown — not stated by the source	Gigabit Ethernet
Ports & interfacesidentical
Modem (RJ-11) portsKnown for one	Unknown — not stated by the source	1
Performance1 differ
Motherboard chipsetDiffers	Intel® HM65 Express	Intel® QM67 Express
Keyboardidentical
Numeric keypadKnown for one	No	Unknown — not stated by the source
Keyboard layoutKnown for one	QWERTZ	Unknown — not stated by the source
Battery1 differ
Battery technologyKnown for one	Lithium-Ion (Li-Ion)	Unknown — not stated by the source
Battery life (max)Differs	6.6 h	9 h
Weight & dimensions5 differ
WeightDiffers	2.61 kg	2.17 kg
WidthDiffers	380 mm	340.5 mm
DepthDiffers	247 mm	233 mm
Height (front)Differs	3.2 cm	3.01 cm
Height (rear)Differs	3.6 cm	3.05 cm
Other featuresidentical
Internal modemKnown for one	Unknown — not stated by the source	Yes
Modem speedKnown for one	Unknown — not stated by the source	56 Kbit/s
Supplied AC adapter typeKnown for one	Unknown — not stated by the source	AC

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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