Product comparison · 2 laptops

Lenovo S531 + ThinkPad OneLink Dock vs Lenovo ThinkPad W540

128specifications compared
50differ
78identical
51known for one product only

Key differences

Display resolution
- S531 + ThinkPad OneLink Dock:1366 x 768 pixels
- ThinkPad W540:1920 x 1080 pixels
HD type
- S531 + ThinkPad OneLink Dock:HD
- ThinkPad W540:Full HD
Processor family
- S531 + ThinkPad OneLink Dock:Intel® Core™ i5
- ThinkPad W540:Intel® Core™ i7
Processor generation
- S531 + ThinkPad OneLink Dock:3rd gen Intel® Core™ i5
- ThinkPad W540:4th gen Intel® Core™ i7
Processor model
- S531 + ThinkPad OneLink Dock:i5-3337U
- ThinkPad W540:i7-4800MQ
Processor cores
- S531 + ThinkPad OneLink Dock:2
- ThinkPad W540:4
Processor threads
- S531 + ThinkPad OneLink Dock:4
- ThinkPad W540:8
Processor boost frequency
- S531 + ThinkPad OneLink Dock:2.7 GHz
- ThinkPad W540:3.7 GHz

Side by side

Differences highlightedShow differences only

Comparison of S531 + ThinkPad OneLink Dock, ThinkPad W540
179 specifications	A Lenovo S531 + ThinkPad OneLink Dock View product	B Lenovo ThinkPad W540 View product
Designidentical
Product type	Laptop	Laptop
Product colour	Black	Black
Form factor	Clamshell	Clamshell
Display2 differ
Display diagonal	39.6 cm (15.6")	39.6 cm (15.6")
Display resolutionDiffers	1366 x 768 pixels	1920 x 1080 pixels
TouchscreenKnown for one	No	Unknown — not stated by the source
HD typeDiffers	HD	Full HD
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
Display brightnessKnown for one	200 cd/m²	Unknown — not stated by the source
Dual-screenKnown for one	No	Unknown — not stated by the source
Processor16 differ
Processor manufacturer	Intel	Intel
Processor familyDiffers	Intel® Core™ i5	Intel® Core™ i7
Processor generationDiffers	3rd gen Intel® Core™ i5	4th gen Intel® Core™ i7
Processor modelDiffers	i5-3337U	i7-4800MQ
Processor coresDiffers	2	4
Processor threadsDiffers	4	8
Processor boost frequencyDiffers	2.7 GHz	3.7 GHz
Processor frequencyDiffers	1.8 GHz	2.7 GHz
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
Processor cacheDiffers	3 MB	6 MB
Processor cache type	Smart Cache	Smart Cache
Processor socketDiffers	BGA 1023	PGA946
Processor lithography	22 nm	22 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i5-3300 Mobile series	Intel Core i7-4800 Mobile series
Processor codenameDiffers	Ivy Bridge	Haswell
Bus typeDiffers	DMI	DMI2
FSB Parity	No	No
SteppingDiffers	L1	C0
Thermal Design Power (TDP)Differs	17 W	47 W
TjunctionDiffers	105 °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 versionDiffers	2.0	3.0
CPU multiplier (bus/core ratio)Known for one	18	Unknown — not stated by the source
ECC supported by processor	No	No
Memory2 differ
Internal memoryDiffers	4 GB	8 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speed	1600 MHz	1600 MHz
Maximum internal memoryDiffers	10 GB	32 GB
Storage3 differ
Total storage capacityDiffers	524 GB	180 GB
Storage mediaDiffers	HDD+SSD	SSD
Number of HDDs installedKnown for one	1	Unknown — not stated by the source
HDD capacityKnown for one	500 GB	Unknown — not stated by the source
HDD interfaceKnown for one	SATA	Unknown — not stated by the source
HDD speedKnown for one	7200 RPM	Unknown — not stated by the source
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
Number of SSDs installed	1	1
SSD capacityDiffers	24 GB	180 GB
Optical drive typeKnown for one	No	Unknown — not stated by the source
Card reader integrated	Yes	Yes
Compatible memory cardsKnown for one	MMC, SD, SDHC, SDXC	Unknown — not stated by the source
Graphics4 differ
On-board graphics card	Yes	Yes
Discrete graphics cardKnown for one	No	Unknown — not stated by the source
Discrete graphics card modelKnown for one	Not available	Unknown — not stated by the source
On-board graphics card family	Intel® HD Graphics	Intel® HD Graphics
On-board graphics card modelDiffers	Intel® HD Graphics 4000	Intel® HD Graphics 4600
On-board graphics card base frequencyDiffers	350 MHz	400 MHz
On-board graphics card dynamic frequency (max)Differs	1100 MHz	1300 MHz
On-board graphics card IDDiffers	0x166	0x416
Maximum on-board graphics card memoryKnown for one	Unknown — not stated by the source	1.74 GB
On-board graphics card DirectX versionKnown for one	Unknown — not stated by the source	11.1
Audio1 differ
Audio systemDiffers	Dolby Home Theater	Dolby Home Theater v4
Number of built-in speakersKnown for one	2	Unknown — not stated by the source
Speaker powerKnown for one	3 W	Unknown — not stated by the source
Built-in microphone	Yes	Yes
Cameraidentical
Front camera	Yes	Yes
Front camera resolutionKnown for one	1280 x 720 pixels	Unknown — not stated by the source
Optical driveidentical
LightScribeKnown for one	No	Unknown — not stated by the source
Networkidentical
Wi-Fi	Yes	Yes
Wi-Fi standards	802.11a, 802.11b, 802.11g	802.11a, 802.11b, 802.11g
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
Bluetooth	Yes	Yes
Bluetooth versionKnown for one	4.0	Unknown — not stated by the source
Cabling technologyKnown for one	10/100/1000Base-T(X)	Unknown — not stated by the source
Integrated 4G WiMAXKnown for one	Yes	Unknown — not stated by the source
Ports & interfaces6 differ
USB 2.0 ports quantityDiffers	0	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2	2
eSATA/USB 2.0 ports quantity	0	0
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 quantityDiffers	1	0
DisplayPorts quantity	0	0
DVI port	No	No
VGA (D-Sub) ports quantityDiffers	0	1
Firewire (IEEE 1394) ports	0	0
Thunderbolt ports quantityDiffers	0	1
Headphone outputs	1	1
S/PDIF out port	No	No
Combo headphone/mic port	Yes	Yes
Microphone inDiffers	Yes	No
Docking connectorKnown for one	Yes	Unknown — not stated by the source
ExpressCard slotDiffers	No	Yes
CardBus PCMCIA slots quantityKnown for one	0	Unknown — not stated by the source
CardBus PCMCIA slot typeKnown for one	No	Unknown — not stated by the source
SmartCard slotKnown for one	No	Unknown — not stated by the source
USB Sleep-and-ChargeKnown for one	Yes	Unknown — not stated by the source
USB Sleep-and-Charge portsKnown for one	1	Unknown — not stated by the source
Thunderbolt 2 ports quantityKnown for one	Unknown — not stated by the source	0
Mini HDMI ports quantityKnown for one	Unknown — not stated by the source	0
Micro HDMI ports quantityKnown for one	Unknown — not stated by the source	0
LAN/VGA combo portKnown for one	Unknown — not stated by the source	No
Mini VGA ports quantityKnown for one	Unknown — not stated by the source	0
Keyboardidentical
Pointing device	ThinkPad UltraNav	ThinkPad UltraNav
Keyboard backlitKnown for one	Yes	Unknown — not stated by the source
Numeric keypad	Yes	Yes
Spill-resistant keyboardKnown for one	Yes	Unknown — not stated by the source
Windows keysKnown for one	Yes	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 features8 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 lithographyKnown for one	22 nm	Unknown — not stated by the source
Idle States	Yes	Yes
Intel 64	Yes	Yes
Intel Clear Video Technology	No	No
Intel Demand Based Switching	No	No
Intel Dual Display Capable TechnologyDiffers	Yes	No
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	Yes	Yes
Intel Fast Memory AccessDiffers	Yes	No
Intel Flex Memory AccessDiffers	Yes	No
Intel Identity Protection Technology version	1.00	1.00
Intel Rapid Storage Technology	No	No
Intel Secure Key Technology version	1.00	1.00
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)	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® Secure Key	Yes	Yes
Intel® Smart Cache	Yes	Yes
Intel® Turbo Boost Technology	2.0	2.0
Processor ARK IDDiffers	72055	75128
Processor codeDiffers	SR0XL	SR15L
Processor package sizeDiffers	31 x 24 (BGA1023)	37.5 x 37.5 x 4.7 mm
Supported instruction setsDiffers	AVX	AVX 2.0, SSE4.1, SSE4.2
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	Yes	Yes
Intel TSX-NIKnown for one	Unknown — not stated by the source	No
Intel TSX-NI versionKnown for one	Unknown — not stated by the source	0.00
Battery3 differ
Battery technologyDiffers	Lithium Polymer (LiPo)	Lithium-Ion (Li-Ion)
Number of battery cellsDiffers	4	9
Battery capacityDiffers	62.8 Wh	9210 mAh
Battery life (max)Known for one	9 h	Unknown — not stated by the source
Poweridentical
AC adapter powerKnown for one	65 W	Unknown — not stated by the source
AC adapter frequency	50 - 60 Hz	50 - 60 Hz
AC adapter input voltage	100 - 240 V	100 - 240 V
DC-in jack	Yes	Yes
Security1 differ
Cable lock slotDiffers	Yes	No
Fingerprint readerKnown for one	Yes	Unknown — not stated by the source
Certificatesidentical
Compliance certificatesKnown for one	RoHS	Unknown — not stated by the source
Sustainabilityidentical
Sustainability certificatesKnown for one	ENERGY STAR	Unknown — not stated by the source
Weight & dimensions4 differ
WeightDiffers	2.29 kg	2.53 kg
WidthDiffers	379 mm	375.9 mm
DepthDiffers	252.4 mm	248.9 mm
HeightDiffers	20.7 mm	27.9 mm
Packaging contentidentical
AC adapter included	Yes	Yes
Cables includedKnown for one	AC	Unknown — not stated by the source
ManualKnown for one	Yes	Unknown — not stated by the source
Power cord includedKnown for one	Yes	Unknown — not stated by the source
Quick start guideKnown for one	Yes	Unknown — not stated by the source
Other featuresidentical
TV tuner integratedKnown for one	Unknown — not stated by the source	No
Intel segment taggingKnown for one	Unknown — not stated by the source	Professional

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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