Product comparison · 2 laptops

Dell 15 (l521x) vs Dell 15R (1522)

144specifications compared
52differ
92identical
36known for one product only

Key differences

Product colour
- 15 (l521x):Aluminium, Silver
- 15R (1522):Black, Silver
Display resolution
- 15 (l521x):1920 x 1080 pixels
- 15R (1522):1366 x 768 pixels
Touchscreen
- 15 (l521x):No
- 15R (1522):Yes
Processor generation
- 15 (l521x):3rd gen Intel® Core™ i5
- 15R (1522):4th gen Intel® Core™ i5
Processor model
- 15 (l521x):i5-3230M
- 15R (1522):i5-4200U
Processor boost frequency
- 15 (l521x):3.2 GHz
- 15R (1522):2.6 GHz
Processor frequency
- 15 (l521x):2.6 GHz
- 15R (1522):1.6 GHz
Processor socket
- 15 (l521x):BGA 1023
- 15R (1522):BGA 1168

Side by side

Differences highlightedShow differences only

Comparison of 15 (l521x), 15R (1522)
180 specifications	A Dell 15 (l521x)View product	B Dell 15R (1522)View product
Design1 differ
Product type	Laptop	Laptop
Product colourDiffers	Aluminium, Silver	Black, Silver
Form factor	Clamshell	Clamshell
Display2 differ
Display diagonal	39.6 cm (15.6")	39.6 cm (15.6")
Display resolutionDiffers	1920 x 1080 pixels	1366 x 768 pixels
TouchscreenDiffers	No	Yes
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
HD typeKnown for one	Full HD	Unknown — not stated by the source
Display brightnessKnown for one	250 cd/m²	Unknown — not stated by the source
Processor14 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Core™ i5	Intel® Core™ i5
Processor generationDiffers	3rd gen Intel® Core™ i5	4th gen Intel® Core™ i5
Processor modelDiffers	i5-3230M	i5-4200U
Processor cores	2	2
Processor threads	4	4
Processor boost frequencyDiffers	3.2 GHz	2.6 GHz
Processor frequencyDiffers	2.6 GHz	1.6 GHz
Processor cache	3 MB	3 MB
Processor cache type	Smart Cache	Smart Cache
Processor socketDiffers	BGA 1023	BGA 1168
Processor lithography	22 nm	22 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Core i5-3200 Mobile series	Intel Core i5-4200 Mobile series
Processor codenameDiffers	Ivy Bridge	Haswell
Bus typeDiffers	DMI	DMI2
FSB Parity	No	No
SteppingDiffers	L1	C0
Thermal Design Power (TDP)Differs	35 W	15 W
TjunctionDiffers	105 °C	100 °C
Maximum number of PCI Express lanesDiffers	16	12
PCI Express configurationsDiffers	1x16, 2x8, 1x8+2x4	1x4, 2x4
PCI Express slots versionDiffers	3.0	2.0
ECC supported by processor	No	No
System bus rateKnown for one	5 GT/s	Unknown — not stated by the source
CPU multiplier (bus/core ratio)Known for one	26	Unknown — not stated by the source
Memory3 differ
Internal memoryDiffers	4 GB	6 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speed	1600 MHz	1600 MHz
Memory layout (slots x size)Differs	1 x 4 GB	1 x 2 + 1 x 4 GB
Memory slots	2x SO-DIMM	2x SO-DIMM
Maximum internal memoryDiffers	16 GB	8 GB
Storage4 differ
Total storage capacityDiffers	532 GB	750 GB
Storage mediaDiffers	HDD+SSD	HDD
Number of HDDs installed	1	1
HDD capacityDiffers	500 GB	750 GB
HDD interface	SATA	SATA
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeKnown for one	Unknown — not stated by the source	2.5"
Optical drive type	DVD±RW	DVD±RW
Card reader integrated	Yes	Yes
Compatible memory cardsKnown for one	Unknown — not stated by the source	Memory Stick (MS), MMC, MMC+, MS PRO, SD, SDHC, SDXC
Number of SSDs installedKnown for one	1	Unknown — not stated by the source
SSD capacityKnown for one	32 GB	Unknown — not stated by the source
SSD interfaceKnown for one	mSATA	Unknown — not stated by the source
Graphics4 differ
On-board graphics card	Yes	Yes
On-board graphics card family	Intel® HD Graphics	Intel® HD Graphics
On-board graphics card modelDiffers	Intel® HD Graphics 4000	Intel® HD Graphics 4400
Maximum on-board graphics card memoryKnown for one	Unknown — not stated by the source	1.74 GB
On-board graphics card base frequencyDiffers	650 MHz	200 MHz
On-board graphics card dynamic frequency (max)Differs	1100 MHz	1000 MHz
On-board graphics card DirectX versionKnown for one	Unknown — not stated by the source	12
On-board graphics card IDDiffers	0x166	0xA16
Discrete graphics cardKnown for one	Yes	Unknown — not stated by the source
Discrete graphics card modelKnown for one	NVIDIA® GeForce® GT 630M	Unknown — not stated by the source
Discrete graphics memory typeKnown for one	GDDR5	Unknown — not stated by the source
Audio1 differ
Audio systemDiffers	HD + Waves MaxxAudio 4	MaxxAudio 4
Number of built-in speakers	2	2
Built-in microphone	Yes	Yes
Speaker powerKnown for one	2 W	Unknown — not stated by the source
Camera1 differ
Front camera	Yes	Yes
Front camera resolution (numeric)Differs	1.3 MP	1 MP
Front camera resolutionKnown for one	Unknown — not stated by the source	1280 x 720 pixels
Network1 differ
Wi-Fi	Yes	Yes
Wi-Fi standardsDiffers	802.11a, 802.11b, 802.11g	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s	10,100,1000 Mbit/s
Bluetooth	Yes	Yes
Bluetooth version	4.0	4.0
Data networkKnown for one	Unknown — not stated by the source	Not supported
Cabling technology	10/100/1000Base-T(X)	10/100/1000Base-T(X)
4G WiMAXKnown for one	Unknown — not stated by the source	No
Integrated 4G WiMAXKnown for one	Yes	Unknown — not stated by the source
Ports & interfaces2 differ
USB 2.0 ports quantityDiffers	0	2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers	3	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 quantity	1	1
HDMI versionKnown for one	Unknown — not stated by the source	1.4a
DisplayPorts quantity	0	0
DVI port	No	No
VGA (D-Sub) ports quantity	0	0
Firewire (IEEE 1394) ports	0	0
Thunderbolt ports quantity	0	0
Headphone outputs	1	1
S/PDIF out port	No	No
Microphone in	Yes	Yes
Docking connector	No	No
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	4
Number of SATA III connectorsKnown for one	Unknown — not stated by the source	4
Mini DisplayPorts quantityKnown for one	1	Unknown — not stated by the source
Performance1 differ
Motherboard chipsetDiffers	Intel HM77 Express	Intel HM76 Express
Keyboard2 differ
Pointing device	Touchpad	Touchpad
Numeric keypadDiffers	No	Yes
Windows keys	Yes	Yes
Keyboard layoutDiffers	AZERTY	QWERTZ
Spill-resistant keyboardKnown for one	Yes	Unknown — not stated by the source
Full-size keyboardKnown for one	Yes	Unknown — not stated by the source
Software1 differ
Operating system installedDiffers	Windows 8 Pro	Windows 8
Operating system architecture	64-bit	64-bit
Processor special features10 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
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 TechnologyDiffers	Yes	No
Intel Fast Memory AccessDiffers	Yes	No
Intel Flex Memory AccessDiffers	Yes	No
Intel Identity Protection Technology version	1.00	1.00
Intel ME Firmware VersionKnown for one	Unknown — not stated by the source	9.5
Intel Rapid Storage TechnologyDiffers	No	Yes
Intel Secure Key Technology version	1.00	1.00
Intel Smart Connect TechnologyDiffers	No	Yes
Intel Smart Connect Technology versionKnown for one	Unknown — not stated by the source	1.00
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 Technology	No	No
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)	No	No
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® High Definition Audio (Intel® HD Audio)Known for one	Unknown — not stated by the source	Yes
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® Matrix Storage Technology (Intel® MST)Known for one	Unknown — not stated by the source	No
Intel® My WiFi Technology (Intel® MWT)	Yes	Yes
Intel® Quick Sync Video Technology	Yes	Yes
Intel® Rapid Start Technology	No	No
Intel® Secure Key	Yes	Yes
Intel® Smart Response Technology	No	No
Intel® Turbo Boost Technology	2.0	2.0
Processor ARK IDDiffers	72056	75459
Processor codeDiffers	SR0WX	SR170
Processor package sizeDiffers	31 x 24 (BGA1023)	40 x 24 x 1.5 mm
Supported instruction setsDiffers	AVX	AVX 2.0
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	Yes	Yes
Graphics & IMC lithographyKnown for one	22 nm	Unknown — not stated by the source
Intel® Smart CacheKnown for one	Yes	Unknown — not stated by the source
Battery1 differ
Battery technologyDiffers	Lithium Polymer (LiPo)	Lithium-Ion (Li-Ion)
Number of battery cellsKnown for one	Unknown — not stated by the source	6
Battery capacityKnown for one	Unknown — not stated by the source	65 Wh
Poweridentical
DC-in jack	Yes	Yes
Securityidentical
Cable lock slot	Yes	Yes
Cable lock slot type	Kensington	Kensington
Sustainabilityidentical
Sustainability certificatesKnown for one	Unknown — not stated by the source	ENERGY STAR
Weight & dimensions4 differ
WeightDiffers	2.6 kg	2.32 kg
WidthDiffers	371 mm	376 mm
DepthDiffers	249 mm	259 mm
HeightDiffers	23.2 mm	24.9 mm
Packaging contentidentical
AC adapter included	Yes	Yes
Cables included	AC	AC
Manual	Yes	Yes

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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