Product comparison · 2 laptops

Lenovo T420+Mini Dock Series 3 vs Lenovo W520 + 45N6678

124specifications compared
40differ
84identical
27known for one product only

Key differences

Display diagonal
- T420+Mini Dock Series 3:35.6 cm (14")
- W520 + 45N6678:39.6 cm (15.6")
Display resolution
- T420+Mini Dock Series 3:1600 x 900 pixels
- W520 + 45N6678:1920 x 1080 pixels
HD type
- T420+Mini Dock Series 3:HD+
- W520 + 45N6678:Full HD
Processor family
- T420+Mini Dock Series 3:Intel® Core™ i5
- W520 + 45N6678:Intel® Core™ i7
Processor generation
- T420+Mini Dock Series 3:2nd gen Intel® Core™ i5
- W520 + 45N6678:2nd gen Intel® Core™ i7
Processor model
- T420+Mini Dock Series 3:i5-2410M
- W520 + 45N6678:i7-2820QM
Processor cores
- T420+Mini Dock Series 3:2
- W520 + 45N6678:4
Processor threads
- T420+Mini Dock Series 3:4
- W520 + 45N6678:8

Side by side

Differences highlightedShow differences only

Comparison of T420+Mini Dock Series 3, W520 + 45N6678
151 specifications	A Lenovo T420+Mini Dock Series 3 View product	B Lenovo W520 + 45N6678 View product
Designidentical
Product colour	Black	Black
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
Native aspect ratio	16:9	16:9
Display brightnessKnown for one	230 cd/m²	Unknown — not stated by the source
LED backlightKnown for one	Unknown — not stated by the source	Yes
Processor13 differ
Processor manufacturer	Intel	Intel
Processor familyDiffers	Intel® Core™ i5	Intel® Core™ i7
Processor generationDiffers	2nd gen Intel® Core™ i5	2nd gen Intel® Core™ i7
Processor modelDiffers	i5-2410M	i7-2820QM
Processor coresDiffers	2	4
Processor threadsDiffers	4	8
Processor boost frequencyDiffers	2.9 GHz	3.4 GHz
Processor frequency	2.3 GHz	2.3 GHz
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
Processor cacheDiffers	3 MB	8 MB
Processor cache type	Smart Cache	Smart Cache
Processor socketDiffers	BGA 1023	Socket 1224
Processor lithography	32 nm	32 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i5-2400 Mobile Series	Intel Core i7-2800 Mobile Series
Processor codename	Sandy Bridge	Sandy Bridge
Bus type	DMI	DMI
FSB Parity	No	No
SteppingDiffers	J1	D2
Thermal Design Power (TDP)Differs	35 W	45 W
TjunctionDiffers	100 °C	100 C
Maximum number of PCI Express lanes	16	16
PCI Express configurationsDiffers	1x8, 1x16, 2x4, 2x8	1x16, 2x8, 1x8+2x4
PCI Express slots version	2.0	2.0
CPU multiplier (bus/core ratio)	23	23
ECC supported by processor	No	No
Processor front side busKnown for one	Unknown — not stated by the source	1333 MHz
Memory2 differ
Internal memory	4 GB	4 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speed	1333 MHz	1333 MHz
Memory slotsDiffers	2x SO-DIMM	4x SO-DIMM
Maximum internal memoryDiffers	8 GB	32 GB
Storage1 differ
Total storage capacity	500 GB	500 GB
Number of HDDs installed	1	1
HDD interface	SATA	SATA
HDD speed	7200 RPM	7200 RPM
Optical drive typeDiffers	DVD-RW	DVD-ROM
Card reader integratedKnown for one	Yes	Unknown — not stated by the source
Compatible memory cardsKnown for one	MMC, SD, SDHC, SDXC	Unknown — not stated by the source
HDD capacityKnown for one	Unknown — not stated by the source	500 GB
Graphics2 differ
On-board graphics card	Yes	Yes
Discrete graphics card	Yes	Yes
Discrete graphics card modelDiffers	N12P-NS1	NVIDIA® Quadro® 2000M
Graphics card family	NVIDIA	NVIDIA
On-board graphics card family	Intel® HD Graphics	Intel® HD Graphics
On-board graphics card model	Intel® HD Graphics 3000	Intel® HD Graphics 3000
On-board graphics card base frequency	650 MHz	650 MHz
On-board graphics card dynamic frequency (max)Differs	1200 MHz	1300 MHz
On-board graphics card ID	0x116	0x116
Maximum resolutionKnown for one	Unknown — not stated by the source	1920 x 1200 pixels
Audioidentical
Number of built-in speakersKnown for one	2	Unknown — not stated by the source
Network1 differ
Wi-Fi	Yes	Yes
Networking featuresKnown for one	Gigabit Ethernet	Unknown — not stated by the source
Ethernet LAN	Yes	Yes
BluetoothDiffers	Yes	No
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
Integrated 4G WiMAX	Yes	Yes
Wireless technologyKnown for one	Unknown — not stated by the source	Wi-Fi
Ports & interfaces4 differ
USB 2.0 ports quantityDiffers	2	1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	0	2
eSATA/USB 2.0 ports quantity	1	1
eSATA/USB 3.2 Gen 1 (3.1 Gen 1) ports quantity	0	0
eSATA ports quantity	0	0
Ethernet LAN (RJ-45) ports	1	1
HDMI ports quantity	0	0
DisplayPorts quantity	1	1
DVI port	No	No
VGA (D-Sub) ports quantity	1	1
Thunderbolt ports quantity	0	0
Headphone outputs	1	1
S/PDIF out port	No	No
Microphone in	Yes	Yes
Docking connectorDiffers	No	Yes
ExpressCard slotDiffers	Yes	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
SmartCard slotKnown for one	No	Unknown — not stated by the source
TV-out	No	No
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	0
Performanceidentical
Motherboard chipsetKnown for one	Intel® QM67 Express	Unknown — not stated by the source
Keyboardidentical
Pointing device	ThinkPad UltraNav	ThinkPad UltraNav
Full-size keyboardKnown for one	No	Unknown — not stated by the source
Softwareidentical
Operating system installed	Windows 7 Professional	Windows 7 Professional
Operating system architecture	64-bit	64-bit
Processor special features6 differ
Intel® Wireless Display (Intel® WiDi)	Yes	Yes
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Graphics & IMC lithography	32 nm	32 nm
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	Yes	Yes
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	Yes	Yes
Intel Fast Memory Access	Yes	Yes
Intel Flex Memory Access	Yes	Yes
Intel Identity Protection Technology version	1.00	1.00
Intel Rapid Storage Technology	No	No
Intel Trusted Execution TechnologyDiffers	No	Yes
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Differs	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Differs	No	Yes
Intel® Anti-Theft Technology (Intel® AT)	Yes	Yes
Intel® Clear Video HD Technology (Intel® CVT HD)	Yes	Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
Intel® Identity Protection Technology (Intel® IPT)	Yes	Yes
Intel® InTru™ 3D Technology	Yes	Yes
Intel® Insider™Differs	No	Yes
Intel® My WiFi Technology (Intel® MWT)	Yes	Yes
Intel® Quick Sync Video Technology	Yes	Yes
Intel® Smart CacheKnown for one	Yes	Unknown — not stated by the source
Intel® Turbo Boost Technology	2.0	2.0
Processor ARK IDDiffers	52224	52227
Processor package sizeDiffers	37.5x37.5 (rPGA988B); 31 x 24 (BGA1023)	37.5 x 37.5 (rPGA988B); 31.0 x 24.0 (BGA1224)
Supported instruction sets	AVX	AVX
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	No	No
CPU configuration (max)Known for one	Unknown — not stated by the source	1
Processor codeKnown for one	Unknown — not stated by the source	SR00U
Battery1 differ
Number of battery cellsDiffers	6	9
Battery life (max)Known for one	Unknown — not stated by the source	9 h
Poweridentical
DC-in jack	Yes	Yes
Security1 differ
Cable lock slotDiffers	Yes	No
Cable lock slot typeKnown for one	Kensington	Unknown — not stated by the source
Fingerprint reader	Yes	Yes
Trusted Platform Module (TPM)Known for one	Yes	Unknown — not stated by the source
Weight & dimensions5 differ
WeightDiffers	2.24 kg	2.7 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 included	Yes	Yes
Other features1 differ
Infrared data port	No	No
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
Intel segment taggingDiffers	Home office, Small Business	Professional
Supplied AC adapter type	AC	AC
Certificatesidentical
CertificationKnown for one	Unknown — not stated by the source	ISV
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	ENERGY STAR

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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