Product comparison · 2 laptops

Lenovo L520 + 45N6678 vs Lenovo T420s + ThinkPad Mini Dock Series 3 (EU)

124specifications compared
34differ
90identical
22known for one product only

Key differences

Display diagonal
- L520 + 45N6678:39.6 cm (15.6")
- T420s + ThinkPad Mini Dock Series 3 (EU):35.6 cm (14")
Display resolution
- L520 + 45N6678:1366 x 768 pixels
- T420s + ThinkPad Mini Dock Series 3 (EU):1600 x 900 pixels
Display brightness
- L520 + 45N6678:220 cd/m²
- T420s + ThinkPad Mini Dock Series 3 (EU):250 cd/m²
Contrast ratio (typical)
- L520 + 45N6678:500:1
- T420s + ThinkPad Mini Dock Series 3 (EU):300:1
Processor family
- L520 + 45N6678:Intel® Core™ i5
- T420s + ThinkPad Mini Dock Series 3 (EU):Intel® Core™ i7
Processor generation
- L520 + 45N6678:2nd gen Intel® Core™ i5
- T420s + ThinkPad Mini Dock Series 3 (EU):2nd gen Intel® Core™ i7
Processor model
- L520 + 45N6678:i5-2410M
- T420s + ThinkPad Mini Dock Series 3 (EU):i7-2620M
Processor boost frequency
- L520 + 45N6678:2.9 GHz
- T420s + ThinkPad Mini Dock Series 3 (EU):3.4 GHz

Side by side

Differences highlightedShow differences only

Comparison of L520 + 45N6678, T420s + ThinkPad Mini Dock Series 3 (EU)
146 specifications	A Lenovo L520 + 45N6678 View product	B Lenovo T420s + ThinkPad Mini Dock Series 3 (EU)View product
Display4 differ
Display diagonalDiffers	39.6 cm (15.6")	35.6 cm (14")
Display resolutionDiffers	1366 x 768 pixels	1600 x 900 pixels
Display brightnessDiffers	220 cd/m²	250 cd/m²
Contrast ratio (typical)Differs	500:1	300:1
HD typeKnown for one	Unknown — not stated by the source	HD+
Processor9 differ
Processor familyDiffers	Intel® Core™ i5	Intel® Core™ i7
Processor generationDiffers	2nd gen Intel® Core™ i5	2nd gen Intel® Core™ i7
Processor modelDiffers	i5-2410M	i7-2620M
Processor boost frequencyDiffers	2.9 GHz	3.4 GHz
Processor frequencyDiffers	2.3 GHz	2.7 GHz
Processor cacheDiffers	3 MB	4 MB
Processor seriesDiffers	Intel Core i5-2400 Mobile Series	Intel Core i7-2600 Mobile Series
PCI Express configurationsDiffers	1x8, 1x16, 2x4, 2x8	1x16, 2x8, 1x8+2x4
CPU multiplier (bus/core ratio)Differs	23	27
Memoryidentical
Memory clock speedKnown for one	1333 MHz	Unknown — not stated by the source
Storage2 differ
Total storage capacityDiffers	320 GB	160 GB
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 interfaceKnown for one	SATA	Unknown — not stated by the source
HDD speedKnown for one	5400 RPM	Unknown — not stated by the source
Optical drive typeDiffers	DVD±RW	DVD-RW
SSD capacityKnown for one	Unknown — not stated by the source	160 GB
SSD interfaceKnown for one	Unknown — not stated by the source	SATA
Graphics4 differ
Discrete graphics cardDiffers	No	Yes
Discrete graphics card modelDiffers	Not available	NVIDIA® NVS™ 4200M
Graphics card familyDiffers	Intel	NVIDIA
On-board graphics card dynamic frequency (max)Differs	1200 MHz	1300 MHz
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
Cabling technologyKnown for one	10/100/1000Base-T(X)	Unknown — not stated by the source
Mobile network connectionKnown for one	Unknown — not stated by the source	Yes
Mobile network generationKnown for one	Unknown — not stated by the source	3G
Networking featuresKnown for one	Unknown — not stated by the source	Gigabit Ethernet
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers	3	2
eSATA/USB 2.0 ports quantityKnown for one	1	Unknown — not stated by the source
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown 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
Processor special features6 differ
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Differs	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Differs	No	Yes
Intel® Insider™Differs	No	Yes
Intel® Smart CacheKnown for one	Yes	Unknown — not stated by the source
Processor ARK IDDiffers	52224	52231
Processor package sizeDiffers	37.5x37.5 (rPGA988B); 31 x 24 (BGA1023)	37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023)
CPU configuration (max)Known for one	Unknown — not stated by the source	1
Processor codeKnown for one	Unknown — not stated by the source	SR041
Battery1 differ
Battery technologyKnown for one	Lithium-Ion (Li-Ion)	Unknown — not stated by the source
Battery life (max)Differs	6.6 h	5.5 h
Weight & dimensions5 differ
WeightDiffers	2.61 kg	1.67 kg
WidthDiffers	380 mm	343 mm
DepthDiffers	247 mm	230.1 mm
Height (front)Differs	3.2 cm	2.12 cm
Height (rear)Differs	3.6 cm	2.6 cm

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.

More laptop comparisons

All laptop comparisons