Product comparison · 2 laptops

ASUSPRO B43J Intel® Core™ i7 i7-640M vs Lenovo T420s + 45N6681

122specifications compared
48differ
74identical
47known for one product only

Key differences

Display resolution
- ASUSPRO B43J Intel® Core™ i7 i7-640M:1366 x 768 pixels
- T420s + 45N6681:1600 x 900 pixels
Processor generation
- ASUSPRO B43J Intel® Core™ i7 i7-640M:Intel® Core™ i7
- T420s + 45N6681:2nd gen Intel® Core™ i7
Processor model
- ASUSPRO B43J Intel® Core™ i7 i7-640M:i7-640M
- T420s + 45N6681:i7-2620M
Processor boost frequency
- ASUSPRO B43J Intel® Core™ i7 i7-640M:3.46 GHz
- T420s + 45N6681:3.4 GHz
Processor frequency
- ASUSPRO B43J Intel® Core™ i7 i7-640M:2.8 GHz
- T420s + 45N6681:2.7 GHz
System bus rate
- ASUSPRO B43J Intel® Core™ i7 i7-640M:2.5 GT/s
- T420s + 45N6681:5 GT/s
Processor socket
- ASUSPRO B43J Intel® Core™ i7 i7-640M:BGA 1288
- T420s + 45N6681:BGA 1023
Processor codename
- ASUSPRO B43J Intel® Core™ i7 i7-640M:Arrandale
- T420s + 45N6681:Sandy Bridge

Side by side

Differences highlightedShow differences only

Comparison of B43J, T420s + 45N6681
169 specifications	A ASUS ASUSPRO B43J Intel® Core™ i7 i7-640M Model B43J View product	B Lenovo T420s + 45N6681 View product
Designidentical
Product colour	Black	Black
Form factorKnown for one	Unknown — not stated by the source	Clamshell
Display1 differ
Display diagonal	35.6 cm (14")	35.6 cm (14")
Display resolutionDiffers	1366 x 768 pixels	1600 x 900 pixels
HD typeKnown for one	Unknown — not stated by the source	HD+
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
TouchscreenKnown for one	No	Unknown — not stated by the source
Processor12 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™ i7	Intel® Core™ i7
Processor generationDiffers	Intel® Core™ i7	2nd gen Intel® Core™ i7
Processor modelDiffers	i7-640M	i7-2620M
Processor cores	2	2
Processor threads	4	4
Processor boost frequencyDiffers	3.46 GHz	3.4 GHz
Processor frequencyDiffers	2.8 GHz	2.7 GHz
System bus rateDiffers	2.5 GT/s	5 GT/s
Processor cache	4 MB	4 MB
Processor cache type	Smart Cache	Smart Cache
L3 cacheKnown for one	Unknown — not stated by the source	3 MB
L2 cacheKnown for one	Unknown — not stated by the source	4 MB
Processor socketDiffers	BGA 1288	BGA 1023
Processor lithography	32 nm	32 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i7-600 Mobile Series	Intel Core i7-2600 Mobile Series
Processor codenameDiffers	Arrandale	Sandy Bridge
Bus type	DMI	DMI
FSB Parity	No	No
SteppingDiffers	K0	J1
Thermal Design Power (TDP)	35 W	35 W
TjunctionDiffers	105 °C	100 °C
Maximum number of PCI Express lanes	16	16
PCI Express configurationsDiffers	1x16	1x16, 2x8, 1x8+2x4
PCI Express slots version	2.0	2.0
CPU multiplier (bus/core ratio)Differs	21	27
ECC supported by processor	No	No
Number of Processing Die TransistorsKnown for one	382 M	Unknown — not stated by the source
Processing Die sizeKnown for one	81 mm²	Unknown — not stated by the source
Memoryidentical
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 slots	2x SO-DIMM	2x SO-DIMM
Maximum internal memory	8 GB	8 GB
Storage3 differ
Total storage capacityDiffers	320 GB	160 GB
Storage media	HDD	HDD
Number of HDDs installed	1	1
HDD capacityDiffers	320 GB	160 GB
HDD interface	SATA	SATA
Optical drive typeDiffers	DVD Super Multi	DVD-RW
Card reader integrated	Yes	Yes
Compatible memory cardsKnown for one	Memory Stick (MS), MMC, MS PRO, SD, xD	Unknown — not stated by the source
Graphics5 differ
On-board graphics card	Yes	Yes
Discrete graphics card	Yes	Yes
Discrete graphics card modelDiffers	AMD Mobility Radeon HD 5470	NVIDIA® Quadro® NVS 4200M
Graphics card familyDiffers	ATI	NVIDIA
Discrete graphics memory typeKnown for one	Unknown — not stated by the source	GDDR3
On-board graphics card family	Intel® HD Graphics	Intel® HD Graphics
On-board graphics card modelDiffers	Intel® HD Graphics	Intel® HD Graphics 3000
On-board graphics card base frequencyDiffers	500 MHz	650 MHz
On-board graphics card dynamic frequency (max)Differs	766 MHz	1300 MHz
On-board graphics card IDKnown for one	Unknown — not stated by the source	0x116
Maximum graphics card memoryKnown for one	Unknown — not stated by the source	1.024 GB
Maximum resolutionKnown for one	Unknown — not stated by the source	1600 x 900 pixels
Discrete graphics card memoryKnown for one	0.512 GB	Unknown — not stated by the source
Audioidentical
Audio systemKnown for one	Unknown — not stated by the source	HD
Number of built-in speakersKnown for one	Unknown — not stated by the source	2
Speaker powerKnown for one	Unknown — not stated by the source	1 W
Built-in microphoneKnown for one	Yes	Unknown — not stated by the source
Network2 differ
Wi-Fi	Yes	Yes
Networking featuresKnown for one	Unknown — not stated by the source	Gigabit Ethernet
Wi-Fi standardsDiffers	802.11b, 802.11g, Wi-Fi 4 (802.11n)	802.11a, 802.11g, Wi-Fi 4 (802.11n)
Ethernet LAN	Yes	Yes
Bluetooth	Yes	Yes
Bluetooth versionDiffers	2.1+EDR	3.0+HS
Cabling technology	10/100/1000Base-T(X)	10/100/1000Base-T(X)
Integrated 4G WiMAXKnown for one	Unknown — not stated by the source	Yes
Wireless technologyKnown for one	Wi-Fi	Unknown — not stated by the source
Top Wi-Fi standardKnown for one	Wi-Fi 4 (802.11n)	Unknown — not stated by the source
Ethernet LAN data ratesKnown for one	10,100,1000 Mbit/s	Unknown — not stated by the source
Ports & interfaces5 differ
USB 2.0 ports quantity	2	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	0	1
eSATA/USB 2.0 ports quantityKnown for one	Unknown — not stated by the source	0
eSATA/USB 3.2 Gen 1 (3.1 Gen 1) ports quantity	0	0
eSATA ports quantityDiffers	1	0
Ethernet LAN (RJ-45) ports	1	1
HDMI ports quantityDiffers	1	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	Yes	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
Modem (RJ-11) portsDiffers	1	0
TV-in portKnown for one	Unknown — not stated by the source	No
TV-outKnown for one	Unknown — not stated by the source	No
PS/2 ports quantityKnown for one	Unknown — not stated by the source	0
Parallel ports quantityKnown for one	Unknown — not stated by the source	0
Serial ports quantityKnown for one	Unknown — not stated by the source	0
Firewire (IEEE 1394) portsKnown for one	0	Unknown — not stated by the source
ExpressCard slotKnown for one	Yes	Unknown — not stated by the source
SmartCard slotKnown for one	No	Unknown — not stated by the source
Performanceidentical
Motherboard chipsetKnown for one	Unknown — not stated by the source	Intel® QM67 Express
Keyboardidentical
Pointing device	Touchpad	Touchpad
Full-size keyboardKnown for one	Unknown — not stated by the source	No
Numeric keypadKnown 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 features14 differ
Intel® Wireless Display (Intel® WiDi)Differs	No	Yes
CPU configuration (max)	1	1
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Graphics & IMC lithographyDiffers	45 nm	32 nm
Idle States	Yes	Yes
Intel 64	Yes	Yes
Intel Clear Video TechnologyDiffers	Yes	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 versionKnown for one	Unknown — not stated by the source	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)Differs	No	Yes
Intel® Clear Video HD Technology (Intel® CVT HD)	Yes	Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)Differs	Yes	No
Intel® Hyper Threading Technology (Intel® HT Technology)	Yes	Yes
Intel® Identity Protection Technology (Intel® IPT)Known for one	Unknown — not stated by the source	Yes
Intel® InTru™ 3D TechnologyDiffers	No	Yes
Intel® Insider™Differs	No	Yes
Intel® My WiFi Technology (Intel® MWT)Differs	No	Yes
Intel® Quick Sync Video TechnologyDiffers	No	Yes
Intel® Turbo Boost TechnologyDiffers	1.0	2.0
Processor ARK IDDiffers	49666	52231
Processor codeDiffers	SLBTN	SR041
Processor package sizeDiffers	rPGA 37.5x 37.5, BGA 34x28	37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023)
Supported instruction setsDiffers	SSE4.1/4.2	AVX
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	No	No
Physical Address Extension (PAE)Known for one	36 bit	Unknown — not stated by the source
Batteryidentical
Number of battery cellsKnown for one	Unknown — not stated by the source	6
Battery capacityKnown for one	47 Wh	Unknown — not stated by the source
Poweridentical
AC adapter powerKnown for one	Unknown — not stated by the source	90 W
DC-in jack	Yes	Yes
Securityidentical
Cable lock slot	No	No
Fingerprint readerKnown for one	Unknown — not stated by the source	Yes
Certificatesidentical
Wi-Fi certifiedKnown for one	Unknown — not stated by the source	Yes
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	ENERGY STAR
Weight & dimensions5 differ
WeightDiffers	2.48 kg	1.67 kg
WidthDiffers	350 mm	343 mm
DepthDiffers	245 mm	230.1 mm
Height (front)Differs	3.3 mm	2.12 cm
Height (rear)Differs	3.5 mm	2.6 cm
Other features1 differ
Infrared data port	No	No
Video inKnown for one	Unknown — not stated by the source	0
Intel segment taggingDiffers	Enterprise, Professional	Home office, Small Business
Supplied AC adapter type	AC	AC
TV tuner integratedKnown for one	No	Unknown — not stated by the source
Packaging contentidentical
Remote control includedKnown for one	No	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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