Product comparison · 2 laptops

Lenovo T420s + 45N6679 vs Lenovo W520 + 45N6678

116specifications compared
35differ
81identical
36known for one product only

Key differences

Display diagonal
- T420s + 45N6679:35.6 cm (14")
- W520 + 45N6678:39.6 cm (15.6")
Display resolution
- T420s + 45N6679:1600 x 900 pixels
- W520 + 45N6678:1920 x 1080 pixels
HD type
- T420s + 45N6679:HD+
- W520 + 45N6678:Full HD
Processor model
- T420s + 45N6679:i7-2620M
- W520 + 45N6678:i7-2820QM
Processor cores
- T420s + 45N6679:2
- W520 + 45N6678:4
Processor threads
- T420s + 45N6679:4
- W520 + 45N6678:8
Processor frequency
- T420s + 45N6679:2.7 GHz
- W520 + 45N6678:2.3 GHz
Processor cache
- T420s + 45N6679:4 MB
- W520 + 45N6678:8 MB

Side by side

Differences highlightedShow differences only

Comparison of T420s + 45N6679, W520 + 45N6678
152 specifications	A Lenovo T420s + 45N6679 View product	B Lenovo W520 + 45N6678 View product
Designidentical
Product colourKnown for one	Unknown — not stated by the source	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
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
Display brightnessKnown for one	250 cd/m²	Unknown — not stated by the source
Contrast ratio (typical)Known for one	300:1	Unknown — not stated by the source
Processor11 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™ i7	Intel® Core™ i7
Processor generation	2nd gen Intel® Core™ i7	2nd gen Intel® Core™ i7
Processor modelDiffers	i7-2620M	i7-2820QM
Processor coresDiffers	2	4
Processor threadsDiffers	4	8
Processor boost frequency	3.4 GHz	3.4 GHz
Processor frequencyDiffers	2.7 GHz	2.3 GHz
Processor cacheDiffers	4 MB	8 MB
Processor cache type	Smart Cache	Smart Cache
Processor front side busKnown for one	Unknown — not stated by the source	1333 MHz
Processor socketDiffers	BGA 1023	Socket 1224
Processor lithography	32 nm	32 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i7-2600 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 configurations	1x16, 2x8, 1x8+2x4	1x16, 2x8, 1x8+2x4
PCI Express slots version	2.0	2.0
CPU multiplier (bus/core ratio)Differs	27	23
ECC supported by processor	No	No
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
Memory2 differ
Internal memory	4 GB	4 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speedKnown for one	Unknown — not stated by the source	1333 MHz
Memory slotsDiffers	2x SO-DIMM	4x SO-DIMM
Maximum internal memoryDiffers	8 GB	32 GB
Storage2 differ
Total storage capacityDiffers	160 GB	500 GB
Number of HDDs installedKnown for one	Unknown — not stated by the source	1
HDD capacityKnown for one	Unknown — not stated by the source	500 GB
HDD interfaceKnown for one	Unknown — not stated by the source	SATA
HDD speedKnown for one	Unknown — not stated by the source	7200 RPM
Optical drive typeDiffers	DVD-RW	DVD-ROM
SSD capacityKnown for one	160 GB	Unknown — not stated by the source
SSD interfaceKnown for one	SATA	Unknown — not stated by the source
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
Graphics1 differ
On-board graphics card	Yes	Yes
Discrete graphics card	Yes	Yes
Discrete graphics card modelDiffers	NVIDIA® NVS™ 4200M	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)	1300 MHz	1300 MHz
On-board graphics card ID	0x116	0x116
Maximum resolutionKnown for one	Unknown — not stated by the source	1920 x 1200 pixels
Network1 differ
Wi-Fi	Yes	Yes
Wireless technologyKnown for one	Unknown — not stated by the source	Wi-Fi
Ethernet LAN	Yes	Yes
BluetoothDiffers	Yes	No
Integrated 4G WiMAX	Yes	Yes
Mobile network connectionKnown for one	Yes	Unknown — not stated by the source
Mobile network generationKnown for one	3G	Unknown — not stated by the source
Networking featuresKnown for one	Gigabit Ethernet	Unknown — not stated by the source
Bluetooth versionKnown for one	3.0+HS	Unknown — not stated by the source
Ports & interfaces3 differ
USB 2.0 ports quantityDiffers	2	1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	1	2
eSATA/USB 2.0 ports quantityKnown for one	Unknown — not stated by the source	1
eSATA/USB 3.2 Gen 1 (3.1 Gen 1) ports quantityKnown for one	Unknown — not stated by the source	0
eSATA ports quantityKnown for one	Unknown — not stated by the source	0
Ethernet LAN (RJ-45) ports	1	1
HDMI ports quantityKnown for one	Unknown — not stated by the source	0
DisplayPorts quantity	1	1
DVI port	No	No
VGA (D-Sub) ports quantity	1	1
Firewire (IEEE 1394) portsKnown for one	Unknown — not stated by the source	0
Thunderbolt ports quantityKnown for one	Unknown — not stated by the source	0
Headphone outputs	1	1
S/PDIF out port	No	No
Microphone in	Yes	Yes
Docking connector	Yes	Yes
ExpressCard slotDiffers	Yes	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
TV-out	No	No
SmartCard slotKnown for one	Yes	Unknown — not stated by the source
Keyboardidentical
Pointing device	ThinkPad UltraNav	ThinkPad UltraNav
Softwareidentical
Operating system installed	Windows 7 Professional	Windows 7 Professional
Operating system architecture	64-bit	64-bit
Processor special features3 differ
Intel® Wireless Display (Intel® WiDi)	Yes	Yes
CPU configuration (max)	1	1
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 Technology	Yes	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)	Yes	Yes
Intel® AES New Instructions (Intel® AES-NI)	Yes	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™	Yes	Yes
Intel® My WiFi Technology (Intel® MWT)	Yes	Yes
Intel® Quick Sync Video Technology	Yes	Yes
Intel® Turbo Boost Technology	2.0	2.0
Processor ARK IDDiffers	52231	52227
Processor codeDiffers	SR041	SR00U
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)
Supported instruction sets	AVX	AVX
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	No	No
Battery2 differ
Number of battery cellsDiffers	6	9
Battery life (max)Differs	5.5 h	9 h
Poweridentical
DC-in jack	Yes	Yes
Security1 differ
Cable lock slotDiffers	Yes	No
Fingerprint reader	Yes	Yes
Cable lock slot typeKnown for one	IBM	Unknown — not stated by the source
Certificatesidentical
CertificationKnown for one	Unknown — not stated by the source	ISV
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	ENERGY STAR
Weight & dimensions5 differ
WeightDiffers	1.67 kg	2.7 kg
WidthDiffers	343 mm	372.8 mm
DepthDiffers	230.1 mm	245.1 mm
Height (front)Differs	2.12 cm	3.18 cm
Height (rear)Differs	2.6 cm	3.56 cm
Packaging contentidentical
AC adapter includedKnown for one	Unknown — not stated by the source	Yes
Other features1 differ
Infrared data port	No	No
Intel segment taggingDiffers	Home office, Small Business	Professional
Supplied AC adapter typeKnown for one	Unknown — not stated by the source	AC
Audioidentical
Audio systemKnown for one	High Definition Audio	Unknown — not stated by the source
Number of built-in speakersKnown for one	2	Unknown — not stated by the source
Speaker powerKnown for one	1 W	Unknown — not stated by the source
Performanceidentical
Motherboard chipsetKnown for one	Intel® QM67 Express	Unknown — not stated by the source

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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