Product comparison · 2 laptops

Lenovo Flex 2 15D vs Lenovo Essential G40 Intel® Celeron® 2957U Laptop

84specifications compared
33differ
51identical
96known for one product only

Key differences

Product type
- Flex 2 15D:Hybrid (2-in-1)
- Essential G40 Intel® Celeron® 2957U Laptop:Laptop
Display diagonal
- Flex 2 15D:39.6 cm (15.6")
- Essential G40 Intel® Celeron® 2957U Laptop:35.6 cm (14")
Touchscreen
- Flex 2 15D:Yes
- Essential G40 Intel® Celeron® 2957U Laptop:No
Processor manufacturer
- Flex 2 15D:AMD
- Essential G40 Intel® Celeron® 2957U Laptop:Intel
Processor family
- Flex 2 15D:AMD E
- Essential G40 Intel® Celeron® 2957U Laptop:Intel® Celeron®
Processor model
- Flex 2 15D:E1-6010
- Essential G40 Intel® Celeron® 2957U Laptop:2957U
Processor frequency
- Flex 2 15D:1.35 GHz
- Essential G40 Intel® Celeron® 2957U Laptop:1.4 GHz
Processor cache
- Flex 2 15D:1 MB
- Essential G40 Intel® Celeron® 2957U Laptop:2 MB

Side by side

Differences highlightedShow differences only

Comparison of Flex 2 15D, G40
180 specifications	A Lenovo Flex 2 15D View product	B Lenovo Essential G40 Intel® Celeron® 2957U Laptop Model G40 View product
Design2 differ
Product typeDiffers	Hybrid (2-in-1)	Laptop
Product colour	Black	Black
Form factorDiffers	Convertible (Fold-back screen)	Clamshell
Market positioningKnown for one	Business	Unknown — not stated by the source
Display2 differ
Display diagonalDiffers	39.6 cm (15.6")	35.6 cm (14")
Display resolution	1366 x 768 pixels	1366 x 768 pixels
TouchscreenDiffers	Yes	No
HD typeKnown for one	Unknown — not stated by the source	HD
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
Dual-screenKnown for one	Unknown — not stated by the source	No
Touchscreen typeKnown for one	Capacitive	Unknown — not stated by the source
Touch technologyKnown for one	Multi-touch	Unknown — not stated by the source
Processor6 differ
Processor manufacturerDiffers	AMD	Intel
Processor familyDiffers	AMD E	Intel® Celeron®
Processor modelDiffers	E1-6010	2957U
Processor cores	2	2
Processor threads	2	2
Processor frequencyDiffers	1.35 GHz	1.4 GHz
System bus rateKnown for one	Unknown — not stated by the source	5 GT/s
Processor cacheDiffers	1 MB	2 MB
Processor cache typeDiffers	L2	Smart Cache
Processor socketKnown for one	Unknown — not stated by the source	BGA 1168
Processor lithographyKnown for one	Unknown — not stated by the source	22 nm
Processor operating modesKnown for one	Unknown — not stated by the source	64-bit
Processor seriesKnown for one	Unknown — not stated by the source	Intel Celeron Processor 2000 Series for Mobile
Processor codenameKnown for one	Unknown — not stated by the source	Haswell
Bus typeKnown for one	Unknown — not stated by the source	DMI2
FSB ParityKnown for one	Unknown — not stated by the source	No
SteppingKnown for one	Unknown — not stated by the source	D0
Thermal Design Power (TDP)Known for one	Unknown — not stated by the source	15 W
TjunctionKnown for one	Unknown — not stated by the source	100 °C
Maximum number of PCI Express lanesKnown for one	Unknown — not stated by the source	10
PCI Express configurationsKnown for one	Unknown — not stated by the source	4x1, 1x4
PCI Express slots versionKnown for one	Unknown — not stated by the source	2.0
ECC supported by processorKnown for one	Unknown — not stated by the source	No
Memory1 differ
Internal memory	4 GB	4 GB
Internal memory type	DDR3L-SDRAM	DDR3L-SDRAM
Memory layout (slots x size)	1 x 4 GB	1 x 4 GB
Maximum internal memoryDiffers	8 GB	16 GB
Memory clock speedKnown for one	1333 MHz	Unknown — not stated by the source
Memory form factorKnown for one	SO-DIMM	Unknown — not stated by the source
Memory slotsKnown for one	2x SO-DIMM	Unknown — not stated by the source
Maximum internal memory (64-bit)Known for one	8 GB	Unknown — not stated by the source
Storage2 differ
Total storage capacityDiffers	1 TB	500 GB
Storage media	HDD	HDD
Number of HDDs installed	1	1
HDD capacityDiffers	1 TB	500 GB
Optical drive type	DVD±RW	DVD±RW
Card reader integrated	Yes	Yes
Compatible memory cards	MMC, SD	MMC, SD
HDD interfaceKnown for one	SATA III	Unknown — not stated by the source
HDD speedKnown for one	5400 RPM	Unknown — not stated by the source
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
Graphics2 differ
On-board graphics card	Yes	Yes
Discrete graphics cardKnown for one	Unknown — not stated by the source	No
Discrete graphics card modelKnown for one	Unknown — not stated by the source	Not available
On-board graphics card familyDiffers	AMD Radeon R2	Intel® HD Graphics
On-board graphics card modelDiffers	AMD Radeon R2	Intel® HD Graphics
On-board graphics card base frequencyKnown for one	Unknown — not stated by the source	200 MHz
On-board graphics card dynamic frequency (max)Known for one	Unknown — not stated by the source	1000 MHz
Audio1 differ
Audio systemDiffers	Dolby Advanced	Dolby Advanced Audio v2
Number of built-in speakersKnown for one	2	Unknown — not stated by the source
Built-in microphoneKnown for one	Yes	Unknown — not stated by the source
Cameraidentical
Front camera	Yes	Yes
Front camera resolutionKnown for one	1280 x 720 pixels	Unknown — not stated by the source
Network1 differ
Wi-Fi	Yes	Yes
Ethernet LAN	Yes	Yes
Ethernet LAN data ratesDiffers	10,100,1000 Mbit/s	10,100 Mbit/s
Bluetooth	Yes	Yes
Bluetooth version	4.0	4.0
Wi-Fi standardsKnown for one	802.11b, 802.11g, Wi-Fi 4 (802.11n)	Unknown — not stated by the source
Ports & interfaces3 differ
USB 2.0 ports quantity	2	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	1	1
Ethernet LAN (RJ-45) ports	1	1
HDMI ports quantity	1	1
DisplayPorts quantity	0	0
DVI port	No	No
VGA (D-Sub) ports quantityDiffers	0	1
Thunderbolt ports quantity	0	0
Thunderbolt 2 ports quantityKnown for one	Unknown — not stated by the source	0
Headphone outputsDiffers	0	1
S/PDIF out port	No	No
Combo headphone/mic port	Yes	Yes
Microphone inDiffers	No	Yes
ExpressCard slot	No	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
SmartCard slot	No	No
Total number of SATA connectorsKnown for one	Unknown — not stated by the source	2
Number of SATA III connectorsKnown for one	Unknown — not stated by the source	2
Docking connectorKnown for one	No	Unknown — not stated by the source
Keyboardidentical
Numeric keypad	No	No
Windows keys	Yes	Yes
Pointing deviceKnown for one	Touchpad	Unknown — not stated by the source
Spill-resistant keyboardKnown for one	Yes	Unknown — not stated by the source
Software1 differ
Operating system installedDiffers	Windows 8.1	FreeDOS
Operating system architectureKnown for one	64-bit	Unknown — not stated by the source
Processor special features6 differ
Intel® Wireless Display (Intel® WiDi)	No	No
CPU configuration (max)Known for one	Unknown — not stated by the source	1
Embedded options availableKnown for one	Unknown — not stated by the source	No
Enhanced Intel SpeedStep TechnologyKnown for one	Unknown — not stated by the source	Yes
Execute Disable BitKnown for one	Unknown — not stated by the source	Yes
Idle StatesKnown for one	Unknown — not stated by the source	Yes
Intel 64Known for one	Unknown — not stated by the source	Yes
Intel Clear Video TechnologyDiffers	No	Yes
Intel Demand Based SwitchingKnown for one	Unknown — not stated by the source	No
Intel Dual Display Capable TechnologyKnown for one	Unknown — not stated by the source	No
Intel Enhanced Halt StateKnown for one	Unknown — not stated by the source	Yes
Intel FDI TechnologyKnown for one	Unknown — not stated by the source	No
Intel Fast Memory AccessKnown for one	Unknown — not stated by the source	No
Intel Flex Memory AccessKnown for one	Unknown — not stated by the source	No
Intel Identity Protection Technology versionKnown for one	Unknown — not stated by the source	0.00
Intel ME Firmware VersionKnown for one	Unknown — not stated by the source	9.5
Intel Rapid Storage TechnologyKnown for one	Unknown — not stated by the source	Yes
Intel Secure Key Technology versionKnown for one	Unknown — not stated by the source	1.00
Intel Small Business Advantage (SBA) versionKnown for one	Unknown — not stated by the source	0.00
Intel Smart Connect TechnologyDiffers	No	Yes
Intel Smart Connect Technology versionKnown for one	Unknown — not stated by the source	1.00
Intel Smart Response Technology versionKnown for one	Unknown — not stated by the source	0.00
Intel Stable Image Platform Program (SIPP)Known for one	Unknown — not stated by the source	No
Intel Stable Image Platform Program (SIPP) versionKnown for one	Unknown — not stated by the source	0.00
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
Intel Trusted Execution TechnologyKnown for one	Unknown — not stated by the source	No
Intel VT-x with Extended Page Tables (EPT)Known for one	Unknown — not stated by the source	Yes
Intel Virtualization Technology (VT-x)Known for one	Unknown — not stated by the source	Yes
Intel Virtualization Technology for Directed I/O (VT-d)Known for one	Unknown — not stated by the source	No
Intel® AES New Instructions (Intel® AES-NI)Known for one	Unknown — not stated by the source	No
Intel® Anti-Theft Technology (Intel® AT)	No	No
Intel® Clear Video HD Technology (Intel® CVT HD)Differs	No	Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)Differs	No	Yes
Intel® High Definition Audio (Intel® HD Audio)Differs	No	Yes
Intel® Hyper Threading Technology (Intel® HT Technology)	No	No
Intel® Identity Protection Technology (Intel® IPT)	No	No
Intel® InTru™ 3D Technology	No	No
Intel® Insider™	No	No
Intel® Matrix Storage Technology (Intel® MST)	No	No
Intel® My WiFi Technology (Intel® MWT)	No	No
Intel® OS GuardKnown for one	Unknown — not stated by the source	No
Intel® Quick Sync Video TechnologyDiffers	No	Yes
Intel® Secure KeyKnown for one	Unknown — not stated by the source	Yes
Intel® Small Business Advantage (Intel® SBA)	No	No
Intel® Smart CacheKnown for one	Unknown — not stated by the source	Yes
Intel® Smart Response Technology	No	No
Intel® Turbo Boost Technology	No	No
Processor ARK IDKnown for one	Unknown — not stated by the source	78942
Processor codeKnown for one	Unknown — not stated by the source	SR1DV
Processor package sizeKnown for one	Unknown — not stated by the source	40 x 24 x 1.5 mm
Supported instruction setsKnown for one	Unknown — not stated by the source	SSE4.1, SSE4.2
Thermal Monitoring TechnologiesKnown for one	Unknown — not stated by the source	Yes
UARTKnown for one	Unknown — not stated by the source	Yes
Conflict-Free processorKnown for one	Unknown — not stated by the source	Yes
Intel® Active Management Technology (Intel® AMT)Known for one	No	Unknown — not stated by the source
Intel® Rapid Start TechnologyKnown for one	No	Unknown — not stated by the source
Battery1 differ
Number of battery cells	4	4
Battery life (max)Differs	6 h	4 h
Battery technologyKnown for one	Lithium-Ion (Li-Ion)	Unknown — not stated by the source
Battery capacityKnown for one	32 Wh	Unknown — not stated by the source
Battery voltageKnown for one	14.4 V	Unknown — not stated by the source
Poweridentical
AC adapter frequencyKnown for one	Unknown — not stated by the source	50 - 60 Hz
AC adapter input voltageKnown for one	Unknown — not stated by the source	100 - 240 V
DC-in jack	Yes	Yes
AC adapter powerKnown for one	45 W	Unknown — not stated by the source
Security1 differ
Cable lock slotDiffers	Yes	No
Cable lock slot typeKnown for one	Kensington	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	5 - 35 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	5 - 43 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	8 - 95%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating altitudeKnown for one	Unknown — not stated by the source	0 - 2438 m
Weight & dimensions4 differ
WeightDiffers	2.3 kg	2.1 kg
WidthDiffers	380.5 mm	349 mm
DepthDiffers	272.7 mm	245 mm
HeightDiffers	22.2 mm	24.8 mm
Packaging contentidentical
AC adapter included	Yes	Yes
Manual	Yes	Yes
Power cord included	Yes	Yes
Quick start guideKnown for one	Unknown — not stated by the source	Yes
Certificatesidentical
Compliance certificatesKnown for one	RoHS	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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