Product comparison · 2 laptops

Lenovo L520 + 45N6681 vs Lenovo T420s + 45N6681

124specifications compared
37differ
87identical
41known for one product only

Key differences

Display diagonal
- L520 + 45N6681:39.6 cm (15.6")
- T420s + 45N6681:35.6 cm (14")
Display resolution
- L520 + 45N6681:1366 x 768 pixels
- T420s + 45N6681:1600 x 900 pixels
Processor family
- L520 + 45N6681:Intel® Core™ i5
- T420s + 45N6681:Intel® Core™ i7
Processor generation
- L520 + 45N6681:2nd gen Intel® Core™ i5
- T420s + 45N6681:2nd gen Intel® Core™ i7
Processor model
- L520 + 45N6681:i5-2410M
- T420s + 45N6681:i7-2620M
Processor boost frequency
- L520 + 45N6681:2.9 GHz
- T420s + 45N6681:3.4 GHz
Processor frequency
- L520 + 45N6681:2.3 GHz
- T420s + 45N6681:2.7 GHz
Processor cache
- L520 + 45N6681:3 MB
- T420s + 45N6681:4 MB

Side by side

Differences highlightedShow differences only

Comparison of L520 + 45N6681, T420s + 45N6681
165 specifications	A Lenovo L520 + 45N6681 View product	B Lenovo T420s + 45N6681 View product
Designidentical
Product colourKnown for one	Unknown — not stated by the source	Black
Form factorKnown for one	Unknown — not stated by the source	Clamshell
Display2 differ
Display diagonalDiffers	39.6 cm (15.6")	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
Display brightnessKnown for one	220 cd/m²	Unknown — not stated by the source
Contrast ratio (typical)Known for one	500:1	Unknown — not stated by the source
Processor9 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	i7-2620M
Processor cores	2	2
Processor threads	4	4
Processor boost frequencyDiffers	2.9 GHz	3.4 GHz
Processor frequencyDiffers	2.3 GHz	2.7 GHz
System bus rate	5 GT/s	5 GT/s
Processor cacheDiffers	3 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 socket	BGA 1023	BGA 1023
Processor lithography	32 nm	32 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i5-2400 Mobile Series	Intel Core i7-2600 Mobile Series
Processor codename	Sandy Bridge	Sandy Bridge
Bus type	DMI	DMI
FSB Parity	No	No
Stepping	J1	J1
Thermal Design Power (TDP)	35 W	35 W
Tjunction	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)Differs	23	27
ECC supported by processor	No	No
Memoryidentical
Internal memory	4 GB	4 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speed	1333 MHz	1333 MHz
Memory slots	2x SO-DIMM	2x SO-DIMM
Maximum internal memory	8 GB	8 GB
Storage2 differ
Total storage capacityDiffers	320 GB	160 GB
Storage media	HDD	HDD
Number of HDDs installed	1	1
HDD capacityKnown for one	Unknown — not stated by the source	160 GB
HDD interface	SATA	SATA
Optical drive typeDiffers	DVD±RW	DVD-RW
Card reader integrated	Yes	Yes
HDD speedKnown for one	5400 RPM	Unknown — not stated by the source
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 cardDiffers	No	Yes
Discrete graphics card modelDiffers	Not available	NVIDIA® Quadro® NVS 4200M
Graphics card familyDiffers	Intel	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 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 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
Audio2 differ
Audio systemDiffers	High Definition Audio	HD
Number of built-in speakers	2	2
Speaker powerDiffers	1.5 W	1 W
Built-in microphoneKnown for one	Yes	Unknown — not stated by the source
Network1 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 version	3.0+HS	3.0+HS
Cabling technology	10/100/1000Base-T(X)	10/100/1000Base-T(X)
Integrated 4G WiMAX	Yes	Yes
Ports & interfaces3 differ
USB 2.0 ports quantityDiffers	3	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one	Unknown — not stated by the source	1
eSATA/USB 2.0 ports quantityDiffers	1	0
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
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 connectorDiffers	Yes	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
Modem (RJ-11) portsKnown for one	Unknown — not stated by the source	0
TV-in portKnown for one	Unknown — not stated by the source	No
TV-out	No	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
ExpressCard slotKnown for one	Yes	Unknown — not stated by the source
SmartCard slotKnown for one	Yes	Unknown — not stated by the source
Performance1 differ
Motherboard chipsetDiffers	Intel® HM65 Express	Intel® QM67 Express
Keyboard1 differ
Pointing deviceDiffers	ThinkPad UltraNav	Touchpad
Full-size keyboardKnown for one	Unknown — not stated by the source	No
Numeric keypadKnown for one	No	Unknown — not stated by the source
Keyboard layoutKnown for one	QWERTY	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
CPU configuration (max)Known for one	Unknown — not stated by the source	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 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® Turbo Boost Technology	2.0	2.0
Processor ARK IDDiffers	52224	52231
Processor codeKnown for one	Unknown — not stated by the source	SR041
Processor package sizeDiffers	37.5x37.5 (rPGA988B); 31 x 24 (BGA1023)	37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023)
Supported instruction sets	AVX	AVX
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	No	No
Intel® Smart CacheKnown for one	Yes	Unknown — not stated by the source
Batteryidentical
Number of battery cells	6	6
Battery technologyKnown for one	Lithium-Ion (Li-Ion)	Unknown — not stated by the source
Battery life (max)Known for one	6.6 h	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
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
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	2.61 kg	1.67 kg
WidthDiffers	380 mm	343 mm
DepthDiffers	247 mm	230.1 mm
Height (front)Differs	3.2 cm	2.12 cm
Height (rear)Differs	3.6 cm	2.6 cm
Other featuresidentical
Infrared data port	No	No
Video inKnown for one	Unknown — not stated by the source	0
Intel segment tagging	Home office, Small Business	Home office, Small Business
Supplied AC adapter typeKnown for one	Unknown — not stated by the source	AC

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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