Product comparison · 2 laptops

Lenovo T420+Mini Dock Series 3 vs Lenovo T520 + 45N6678

125specifications compared
15differ
110identical
25known for one product only

Key differences

Display diagonal
- T420+Mini Dock Series 3:35.6 cm (14")
- T520 + 45N6678:39.6 cm (15.6")
Display resolution
- T420+Mini Dock Series 3:1600 x 900 pixels
- T520 + 45N6678:1366 x 768 pixels
Display brightness
- T420+Mini Dock Series 3:230 cd/m²
- T520 + 45N6678:220 cd/m²
Total storage capacity
- T420+Mini Dock Series 3:500 GB
- T520 + 45N6678:320 GB
Discrete graphics card model
- T420+Mini Dock Series 3:N12P-NS1
- T520 + 45N6678:Intel® HD Graphics 3000
Graphics card family
- T420+Mini Dock Series 3:NVIDIA
- T520 + 45N6678:Intel
USB 2.0 ports quantity
- T420+Mini Dock Series 3:2
- T520 + 45N6678:4
Docking connector
- T420+Mini Dock Series 3:No
- T520 + 45N6678:Yes

Side by side

Differences highlightedShow differences only

Comparison of T420+Mini Dock Series 3, T520 + 45N6678
150 specifications	A Lenovo T420+Mini Dock Series 3 View product	B Lenovo T520 + 45N6678 View product
Designidentical
Product colourKnown for one	Black	Unknown — not stated by the source
Display3 differ
Display diagonalDiffers	35.6 cm (14")	39.6 cm (15.6")
Display resolutionDiffers	1600 x 900 pixels	1366 x 768 pixels
HD typeKnown for one	HD+	Unknown — not stated by the source
Display brightnessDiffers	230 cd/m²	220 cd/m²
LED backlightKnown for one	Unknown — not stated by the source	Yes
Contrast ratio (typical)Known for one	Unknown — not stated by the source	500:1
Memoryidentical
Memory layout (slots x size)Known for one	Unknown — not stated by the source	2 x 2 GB
Storage1 differ
Total storage capacityDiffers	500 GB	320 GB
Graphics2 differ
Discrete graphics card modelDiffers	N12P-NS1	Intel® HD Graphics 3000
Graphics card familyDiffers	NVIDIA	Intel
Audioidentical
Audio systemKnown for one	Unknown — not stated by the source	High Definition Audio
Speaker powerKnown for one	Unknown — not stated by the source	1 W
Networkidentical
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
Ports & interfaces3 differ
USB 2.0 ports quantityDiffers	2	4
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one	0	Unknown — not stated by the source
eSATA/USB 2.0 ports quantityKnown for one	1	Unknown — not stated by the source
eSATA/USB 3.2 Gen 1 (3.1 Gen 1) ports quantityKnown for one	0	Unknown — not stated by the source
eSATA ports quantityKnown for one	0	Unknown — not stated by the source
HDMI ports quantityKnown for one	0	Unknown — not stated by the source
Thunderbolt ports quantityKnown for one	0	Unknown — not stated by the source
Docking connectorDiffers	No	Yes
SmartCard slotDiffers	No	Yes
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	1
Modem (RJ-11) portsKnown for one	Unknown — not stated by the source	1
Keyboardidentical
Full-size keyboardKnown for one	No	Unknown — not stated by the source
Batteryidentical
Battery life (max)Known for one	Unknown — not stated by the source	7.7 h
Security1 differ
Cable lock slot typeDiffers	Kensington	IBM
Trusted Platform Module (TPM)Known for one	Yes	Unknown — not stated by the source
Weight & dimensions5 differ
WeightDiffers	2.24 kg	2.51 kg
WidthDiffers	340 mm	372.8 mm
DepthDiffers	229.8 mm	245.1 mm
Height (front)Differs	2.99 cm	3.18 cm
Height (rear)Differs	3.04 cm	3.56 cm
Packaging contentidentical
AC adapter includedKnown for one	Yes	Unknown — not stated by the source
Other featuresidentical
Compliance industry standardsKnown for one	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab	Unknown — not stated by the source
Power requirementsKnown for one	100-240V	Unknown — not stated by the source
Internal modemKnown for one	Unknown — not stated by the source	Yes
Modem speedKnown for one	Unknown — not stated by the source	56 Kbit/s

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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