Product comparison · 2 laptops

Dell 15 (3521) vs Dell 17R (5721)

144specifications compared
35differ
109identical
22known for one product only

Key differences

Product colour
- 15 (3521):Black
- 17R (5721):Silver
Display diagonal
- 15 (3521):39.6 cm (15.6")
- 17R (5721):43.9 cm (17.3")
Display resolution
- 15 (3521):1366 x 768 pixels
- 17R (5721):1600 x 900 pixels
HD type
- 15 (3521):HD
- 17R (5721):HD+
Processor family
- 15 (3521):Intel® Pentium®
- 17R (5721):Intel® Core™ i5
Processor model
- 15 (3521):2117U
- 17R (5721):i5-3337U
Processor threads
- 15 (3521):2
- 17R (5721):4
Processor cache
- 15 (3521):2 MB
- 17R (5721):3 MB

Side by side

Differences highlightedShow differences only

Comparison of 15 (3521), 17R (5721)
166 specifications	A Dell 15 (3521)View product	B Dell 17R (5721)View product
Design1 differ
Product type	Laptop	Laptop
Product colourDiffers	Black	Silver
Form factor	Clamshell	Clamshell
Display3 differ
Display diagonalDiffers	39.6 cm (15.6")	43.9 cm (17.3")
Display resolutionDiffers	1366 x 768 pixels	1600 x 900 pixels
TouchscreenKnown for one	Unknown — not stated by the source	No
HD typeDiffers	HD	HD+
LED backlight	Yes	Yes
Native aspect ratio	16:9	16:9
Processor6 differ
Processor manufacturer	Intel	Intel
Processor familyDiffers	Intel® Pentium®	Intel® Core™ i5
Processor generationKnown for one	Unknown — not stated by the source	3rd gen Intel® Core™ i5
Processor modelDiffers	2117U	i5-3337U
Processor cores	2	2
Processor threadsDiffers	2	4
Processor boost frequencyKnown for one	Unknown — not stated by the source	2.7 GHz
Processor frequency	1.8 GHz	1.8 GHz
System bus rate	5 GT/s	5 GT/s
Processor cacheDiffers	2 MB	3 MB
Processor cache type	Smart Cache	Smart Cache
Processor socket	BGA 1023	BGA 1023
Processor lithography	22 nm	22 nm
Processor operating modes	64-bit	64-bit
Processor seriesDiffers	Intel Pentium 2000 series for Mobile	Intel Core i5-3300 Mobile series
Processor codename	Ivy Bridge	Ivy Bridge
Bus type	DMI	DMI
FSB Parity	No	No
SteppingDiffers	P0	L1
Thermal Design Power (TDP)	17 W	17 W
Tjunction	105 °C	105 °C
Maximum number of PCI Express lanes	16	16
PCI Express configurations	1x16, 2x8, 1x8+2x4	1x16, 2x8, 1x8+2x4
PCI Express slots version	2.0	2.0
CPU multiplier (bus/core ratio)	18	18
ECC supported by processor	No	No
Memory1 differ
Internal memoryDiffers	4 GB	8 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory clock speed	1600 MHz	1600 MHz
Memory form factor	SO-DIMM	SO-DIMM
Memory slotsKnown for one	Unknown — not stated by the source	2x SO-DIMM
Maximum internal memoryKnown for one	Unknown — not stated by the source	8 GB
Storageidentical
Total storage capacity	1 TB	1 TB
Storage media	HDD	HDD
Number of HDDs installed	1	1
HDD capacity	1 TB	1 TB
Optical drive type	DVD±RW	DVD±RW
Card reader integratedKnown for one	Unknown — not stated by the source	Yes
Compatible memory cardsKnown for one	Unknown — not stated by the source	Memory Stick (MS), MMC, MMC+, MS PRO, MSXC, SD, SDHC, SDXC
Graphics2 differ
On-board graphics card	Yes	Yes
Discrete graphics cardKnown for one	Unknown — not stated by the source	Yes
Discrete graphics card modelKnown for one	Unknown — not stated by the source	AMD Radeon HD 8730M
Discrete graphics card memoryKnown for one	Unknown — not stated by the source	2 GB
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 4000
On-board graphics card base frequency	350 MHz	350 MHz
On-board graphics card dynamic frequency (max)Differs	1000 MHz	1100 MHz
On-board graphics card IDKnown for one	Unknown — not stated by the source	0x166
Audioidentical
Audio system	Waves MaxxAudio 4	Waves MaxxAudio 4
Built-in microphone	Yes	Yes
Cameraidentical
Front camera	Yes	Yes
Front camera resolution (numeric)	1 MP	1 MP
Swivel webcam	No	No
Rear camera	No	No
Optical driveidentical
LightScribe	No	No
Network2 differ
Mobile network connectionKnown for one	Unknown — not stated by the source	Yes
Mobile network generationKnown for one	Unknown — not stated by the source	4G
4G standardKnown for one	Unknown — not stated by the source	WiMAX
Wi-Fi	Yes	Yes
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n)	802.11b, 802.11g, Wi-Fi 4 (802.11n)
Ethernet LAN	Yes	Yes
Ethernet LAN data rates	10,100 Mbit/s	10,100 Mbit/s
Bluetooth	Yes	Yes
Bluetooth versionKnown for one	Unknown — not stated by the source	4.0
Cabling technology	10/100Base-T(X)	10/100Base-T(X)
Networking standards	IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.3, IEEE 802.3u	IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.3, IEEE 802.3u
4G WiMAXDiffers	No	Yes
Integrated 4G WiMAXDiffers	No	Yes
Ports & interfacesidentical
USB 2.0 ports quantity	2	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 quantity	1	1
HDMI version	1.4a	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	0	0
S/PDIF out port	No	No
Combo headphone/mic port	Yes	Yes
Microphone in	No	No
Docking connector	No	No
ExpressCard slot	No	No
CardBus PCMCIA slots quantity	0	0
CardBus PCMCIA slot type	No	No
SmartCard slot	No	No
Performanceidentical
Motherboard chipset	Intel HM76 Express	Intel HM76 Express
Keyboardidentical
Pointing device	Touchpad	Touchpad
Numeric keypad	Yes	Yes
Softwareidentical
Operating system installed	Windows 8	Windows 8
Processor special features15 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 lithography	22 nm	22 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 versionKnown for one	Unknown — not stated by the source	1.00
Intel Rapid Storage Technology	No	No
Intel Secure Key Technology versionKnown for one	Unknown — not stated by the source	1.00
Intel Smart Connect Technology	No	No
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)Differs	No	Yes
Intel® AES New Instructions (Intel® AES-NI)Differs	No	Yes
Intel® Anti-Theft Technology (Intel® AT)Differs	No	Yes
Intel® Clear Video HD Technology (Intel® CVT HD)Differs	No	Yes
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)Differs	No	Yes
Intel® Identity Protection Technology (Intel® IPT)Differs	No	Yes
Intel® InTru™ 3D TechnologyDiffers	No	Yes
Intel® Insider™Differs	No	Yes
Intel® My WiFi Technology (Intel® MWT)	Yes	Yes
Intel® Quick Sync Video TechnologyDiffers	No	Yes
Intel® Rapid Start Technology	No	No
Intel® Secure KeyKnown for one	Unknown — not stated by the source	Yes
Intel® Smart Cache	Yes	Yes
Intel® Smart Response Technology	No	No
Intel® Turbo Boost TechnologyDiffers	No	2.0
Processor ARK IDDiffers	71469	72055
Processor codeDiffers	SR0VQ	SR0XL
Processor package sizeDiffers	31 x 24 mm	31 x 24 (BGA1023)
Supported instruction setsDiffers	SSE4.1, SSE4.2	AVX
Thermal Monitoring Technologies	Yes	Yes
Conflict-Free processor	Yes	Yes
Batteryidentical
Battery technology	Lithium-Ion (Li-Ion)	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
Power auto-sensing	Yes	Yes
DC-in jack	Yes	Yes
Securityidentical
Cable lock slot	Yes	Yes
Cable lock slot type	Kensington	Kensington
Weight & dimensions5 differ
WeightDiffers	2.25 kg	2.73 kg
WidthDiffers	376 mm	412 mm
DepthDiffers	259 mm	270 mm
Height (front)Differs	2.49 cm	2.83 cm
Height (rear)Differs	2.53 cm	3.56 cm
Packaging contentidentical
AC adapter included	Yes	Yes
Cables included	AC	AC
Manual	Yes	Yes
Quick start guide	Yes	Yes
Other featuresidentical
3D	No	No
Sustainabilityidentical
Sustainability certificatesKnown for one	ENERGY STAR	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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