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Lenovo T420
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Lenovo T420 2 Core Intel Core I5-2xxx 2.4GHz 4GB 320GB HDD 14" Laptop

PC Mag Editor's Choice Digitaltrends.com Editor's Choice computershopper.com Editor's Choice pcworld.com_techhive.com Business Ready Laptopmag.com Editor's Choice
2 Intel Core I5-2xxx 2.4GHz 4GB Mar 2013
Processor Core Processor Family Processor Clock Speed Internal Memory Release Date
The ThinkPad T420 and T520 notebooks offer the best combination of thin and light mobility and top performance features a business class user would require. Top performing features include Second... More
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Unboxing the Lenovo ThinkPad T420
Lenovo Thinkpad T420 Review
Lenovo Thinkpad T420 HD Video-Preview
[HD] Lenovo Thinkpad T420 Review and Close Up!

12 Reasons For

64-Bit Processor Operating Mode

This laptop supports a 64-bit processor operating mode, which is the most frequently supported processor operating mode on laptops of a similar age and type to it.

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Very Fast On-Board Graphics Adapter Base Frequency

At 650 megahertz, the Lenovo T420 has a very fast on-board graphics adapter base frequency compared to most of the other similar spec laptops that have been on the market for around the same time as the T420. The slowest on-board graphics adapter base frequency of notebook PCs of a similar age and spec to the T420 is 200MHz, the fastest is 650MHz, and the average on-board graphics adapter base frequency is 370MHz.

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Fairly Fast On-Board Graphics Adapter Dynamic Frequency

With an on-board graphics adapter dynamic frequency of 1,200 megahertz, the Lenovo T420 has one of the faster on-board graphics adapter dynamic frequencies amongst portable PCs of this age. Portable PCs of a similar type and age to the T420 have on-board graphics adapter dynamic frequencies of between 660MHz and 1,300MHz, and the average on-board graphics adapter dynamic frequency is 1,100MHz.

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Good Brand

On average Lenovo medium processor core notebook PCs have good ratings compared to other manufacturers as do all notebook PCs manufactured by Lenovo.

1,066MHz Processor Memory Clock Speed

The Lenovo T420 supports a 1,066MHz processor memory clock speed which is faster than the 133MHz processor memory clock speed supported by most portable PCs that were released more than two years ago. In addition, this Lenovo laptop supports 1 and 333MHz processor memory clock speeds. Comparable spec portable PCs that are a similar age to the T420 processor memory clock speeds range from 133MHz to 1,600MHz.

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Fairly Fast Hard Drive Speed

The Lenovo T420 has one of the faster hard drive speeds (7,200 revolutions per minute) amongst medium processor core notebook PCs of this age. The hard drive speeds of similar spec laptops that are a comparable age to the T420 range from 4,200 RPM to 7,200 RPM.

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802.11n WiFi Standard

This notebook PC has an 802.11a|802.11g|802.11n WiFi standard, which is typical of many medium processor core notebook PCs that are a comparable age to it.

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Three USB 2.0 Ports

Most laptops of this age and spec have between one and eight USB 2.0 ports, including the Lenovo T420 which has three USB 2.0 ports.

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64-Bit Operating System Architecture

This laptop has a 64-bit operating system architecture, which is typical of many notebook PCs that are a similar age to it.

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Shallow

The Lenovo T420 is one of the shallower laptops of this spec and age (only 9.05 inches) amongst similar spec notebook PCs of this age. Across all the medium processor core notebook PCs that were released around the same time as the T420 the depths range from 8" to 15", and the average depth is 9.6".

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2x SO-DIMM Memory Slot

This laptop has a 2x SO-DIMM memory slot, which is typical of many medium processor core notebook PCs that are a comparable age to it.

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HDD Storage Medium

This portable PC has an HDD storage medium, which is the most frequently found storage medium on medium processor core notebook PCs that were launched around the same time as it.

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15 Reasons Against

Quite Slow Maximum Processor Memory Bandwidth

Across all the notebook PCs of this spec and age the maximum processor memory bandwidths range from 17GB/s to 32GB/s, and the average maximum processor memory bandwidth is 25GB/s. With a maximum processor memory bandwidth of only 21.3 gigabytes per second, the Lenovo T420 has one of the slower maximum processor memory bandwidths amongst medium processor core notebook PCs of this age.

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Only Two Displays Supported by On-Board Grap

Most notebook PCs that have been available for a comparable time to the T420 use two displays supported by on-board grap, including the Lenovo T420 which uses two displays supported by on-board grap.

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Only One PCI Express Lane (max)

The Lenovo T420 is a one PCI Express lane (max) notebook PC. Most of the other medium processor core notebook PCs that have been around for a similar time to the T420 have between 1 and 15 PCI Express lanes (max).

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Does Not Have a Front Camera

The Lenovo T420 does not have a front camera. Most of the other similar spec portable PCs that were released around the same time as the T420 do have a front camera.

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Does Not Have a Full-Size Keyboard

The Lenovo T420 does not have a full-size keyboard, unlike most of the other notebook PCs of a comparable type and age to the T420.

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Quite Small Total Storage Capacity

The Lenovo T420 has one of the smaller total storage capacity (only 320 gigabytes) amongst medium processor core notebook PCs of this age. The smallest total storage capacity of medium processor core notebook PCs that came out more than two years ago is 1GB and the biggest is 1.5TB.

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Only HDD Storage Medium

This laptop has an HDD storage medium, which is the most frequently found storage medium on medium processor core notebook PCs that have been available for a similar time to it. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.

If the storage medium of this portable PC is not good enough for you then you might also want to look at the T420s (£1,388.87) (SSD), or the S540 (SSD) both from Lenovo.

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Only 1366 X 768 Pixels Display Resolution

This notebook PC has a display resolution of 1366 x 768 pixels, which is the most commonly found display resolution on laptops that were launched more than two years ago.

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Very Small Hard Drive Capacity

With a hard drive capacity of only 320 gigabytes, the Lenovo T420 has one of the smaller hard drive capacity amongst medium processor core notebook PCs of this age. Across all the similar spec laptops that are a comparable age to the T420 the hard drive capacity range from 180GB to 1.5TB.

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Quite Slow Memory Clock Speed

The slowest memory clock speed of notebook PCs that are a similar age to the T420 is 1,000MHz, the fastest is 1,800MHz, and the average memory clock speed is 1,600MHz. The memory clock speed of the Lenovo T420 of only 1,333 megahertz is one of the slowest amongst laptops of a similar age and spec to the T420.

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Only 10 Mbit/s Ethernet LAN Data Rate

This laptop Ethernet LAN data rate, which is typical of many medium processor core notebook PCs that were released more than two years ago.

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Very Small Discrete Graphics Adapter Memory

The average discrete graphics adapter memory of medium processor core notebook PCs that were released more than two years ago is 1.7GB, and the discrete graphics adapter memory range from 510MB to 4.1GB. With a discrete graphics adapter memory of only 1,024 megabyte, the Lenovo T420 has one of the smaller discrete graphics adapter memory amongst similar spec laptops of this age.

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Does Not Have a Touch Sensitive Screen

Like most of the other laptops that have been on the market for a comparable time to the T420, the Lenovo T420 does not have a touch sensitive screen.

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Quite Slow Processor Front Side Bus

The slowest processor front side bus of notebook PCs of a similar age and spec to the T420 is 1.3MHz and the fastest is 1,600MHz. With a processor front side bus of only 1,333 megahertz, the Lenovo T420 has a fairly slow processor front side bus compared to most of the other laptops that are a similar age to the T420.

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Very Low Speaker Power

With an speaker power of only 1 Watt, the Lenovo T420 has a fairly low speaker power compared to most of the other notebook PCs of this type and age. Across all the portable PCs that were released more than two years ago the speaker power range from 1W to 11W.

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7 Other reasons to consider the Lenovo T420

Released Over Four Years Ago

Lenovo released the T420 over four years ago.

Average Processor Clock Speed

At 2.4 gigahertz, the Lenovo T420 has a relatively standard processor clock speed compared to most of the other portable PCs of this type and age.

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Intel Core I5-2xxx Processor Family

The Lenovo T420 has a better processor family than most similar spec notebook PCs that have been around for around the same time as it. This notebook PC has an Intel Core i5-2xxx processor family, whereas most portable PCs of this age and type have an Intel Core i5 processor family.

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Average Weight

With a weight of 2.2 kilograms, the Lenovo T420 has a fairly typical weight compared to most of the other medium processor core notebook PCs that have been around for a similar time to the T420.

Other 2.2kg heavy laptops currently available which you might want to look at include the Lenovo T420 (£229.90) which has better reviews.

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Average Internal Memory

With an internal memory of 4 gigabytes, the Lenovo T420 has a pretty standard internal memory compared to most of the other medium processor core notebook PCs that came out more than two years ago.

If you want a laptop with a bigger internal memory then you might also want to look at the DELL Inspiron 15R (6GB).

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Average Screen Size

The Lenovo T420 has a pretty typical screen size (14 inches) compared to most of the other portable PCs of a similar spec and age to the T420.

If this portable PC screen size is not big enough for you then you might want to look at the Lenovo T410 (£263.99) (14.1").

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Average Battery Life

The Lenovo T420 has a relatively typical battery life (6 hours) compared to most of the other similar spec laptops that were launched around the same time as the T420.

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Specification

Features
Design
Form Factor
Colour
Product Type
Intel Segment Tagging
Docking Station
Processor
Processor Core
Processor Family
Processor Clock Speed
Motherboard Chipset
Processor Socket
Processor Cache
System Bus Data Transfer Rate
Processor Thread
Maximum Turbo Frequency
Processor Model
Integrated 4G WiMAX
Processor Lithography
PCI Express Lane (max)
Processor Operating Mode
PCI Express Slot Version
Bus Type
Processor Codename
Processor Series
Thermal Design Power (TDP)
Stepping
PCI Express Configuration
CPU Multiplier (bus/core Ratio)
Tjunction
Processor Cache Type
Memory
Internal Memory
Maximum Internal Memory
Memory Slot
Memory Clock Speed
Internal Memory
Hard Drive
Storage
Total Storage Capacity
Storage Medium
Integrated Card Reader
Hard Drive Speed
Hard Drive Capacity
Hard Drive Installed
Display
Screen Size
Display Resolution
Touch Sensitive Screen
LED Backlight
HD Type
Video
Graphics
On-Board Graphics Adapter Model
Discrete Graphics Adapter Model
On-Board Graphics Adapter ID
Display Supported by On-Board Grap
On-Board Graphics Adapter Dynamic Frequency
On-Board Graphics Adapter Base Frequency
On-Board Graphics Adapter
Optical Drive
Optical Drive
Audio
Audio System
Camera
Networking
Cabling
Wireless Wide Area Network (WWAN)
Ethernet LAN Data Rate
Ethernet LAN Connection
WiFi Standard
Wireless LAN Connection
3G Network Access Module
Bluetooth
Ports & Interfaces
Mini DisplayPort/Thunderbolt Combo Port
DC-In Jack
S/PDIF Out Port
Microphone in Port
Headphone Out Port
Ethernet LAN Ports
DVI Port
DisplayPort
VGA Port
ESATA/USB 2.0 Port
USB 2.0 Port
LAN/VGA Combo Port
Performance
Integrated TV Tuner
Keyboard
Numeric Keypad
Pointing Device
Operating System/software
Operating System
Processor Special Features
Intel Anti-Theft Technology
Intel VPro Technology
Intel My WiFi Technology
Intel Turbo Boost Technology
Intel Hyper-Threading Technology
Intel Wireless Display (WiDi) Technology
Enhanced Intel SpeedStep Technology
Intel InTru 3D Technology
Intel Insider
Intel Quick Sync Video Technology
Intel Clear Video HD Technology
Supported Instruction Set
Processor Code
Intel FDI Technology
Intel Dual Display Capable Technology
Intel Fast Memory Access
Execute Disable Bit
Thermal Monitoring Technology
CPU Configuration (max)
Intel VT-X With Extended Page Tables (EPT)
Intel Smart Cache
Intel 64
Processor Package Size
Intel Flex Memory Access
Intel Virtualization Technology (VT-X)
Idle States
Graphics & IMC Lithography
Intel Enhanced Halt State
Intel AES New Instructions
Intel Identity Protection Technology Version
Processor ARK ID
Battery
Battery Cell Count
Battery
Power
AC Adapter Input Voltage
AC Adapter Frequency
Security
Special Features
Weight & Dimensions
Weight
Height At Front
Depth
Height At Rear
Width
Packaging Data
Operational Conditions
Certificates
RoHS Compliance
Energy Star Certified
Technical Details
Other Features

8 Awards

PC Mag Editor's Choice Digitaltrends.com Editor's Choice computershopper.com Editor's Choice pcworld.com_techhive.com Business Ready Laptopmag.com Editor's Choice insidehw.com Approved pcfoster.pl Recommended tek.no Recommended

Expert Reviews

(43)
1 June 2012

The Lenovo ThinkPad T420 is a notebook which will take you through fire and water. The most amazing spec is the battery and the most amazing feature is the keyboard. You'll have to refrain from...

23 April 2012

In a nutshell, the Lenovo ThinkPad T420s is a powerful business portable that's a pleasure to use, but not exactly a looker. With its contourless, black plastic body and sharp edges, it looks like... Read more…

Excellent performance
Great keyboard
Good build quality
Sharp screen
160GB SSD
Price
Battery life
Gets quite hot
Expensive
Disappointing battery life
23 April 2012

In a nutshell, the Lenovo ThinkPad T420s is a powerful business portable that's a pleasure to use, but not exactly a looker. With its contourless, black plastic body and sharp edges, it looks like... Read more…

26 March 2012

A powerful and versatile laptop, but poor battery life and business-specific graphics mean it should only appeal to professionals...

15 March 2012

Much of the ThinkPad's design ? and particularly the excellent keyboard ? is traditional, but it packs plenty of up-to-date specs too: Core i7 CPU, hybrid discrete/integrated graphics, solid-state...

« Prev 1 of 9 Next »

User Reviews

(67)
Reviewed 21 June 2013 by Greyowl

I use a T500 for work and got a T420 ( second hand ) at about 25% of the new price - as a backup and for the Nvideo grapics engine for CAE/FEA. I wouldn't be without these machines. OK reviewers... Read more…

Reviewed 24 December 2014 by Andrew Johns
(Verified Purchase)

Gave a lot of thought before buying this used but my worries were groundless. Laptop arrived well packed in its own protective bubble, and in a sturdy box, well insulated from any travel shocks !... Read more…

Reviewed 18 October 2014 by Toomas Laigna
(Verified Purchase)

Since I needed a good, reliable and not too slow professional machine for work and also enjoy playing games, I was faced with a choice: either buy a high-end laptop to fit both needs or slice the... Read more…

Reviewed 25 February 2015 by David Lammin
(Verified Purchase)

10 years or so using amazon and never done a review until now. I'm in 2nd year doing a degree in computing and needed a solid laptop, I decided on t420 and took a punt on refurbished one. Delivery... Read more…

Reviewed 9 February 2015 by Tomasz
(Verified Purchase)

Laptop is working fine, but looks like piece of s***, like someone was using axe to chop of all rubbers and switches. Battery with broken little hooks- gives 15 min work- you can buy replacement... Read more…

« Prev 1 of 14 Next »

Brochures and Manuals

+- Manufacturer's Description

Product Identifiers

Manufacturer Part Numbers code i52520, code i52520m, info 4236pa8, lenovo nw4p3, lenovo nw4p3u, lenovo i52520, lenovo nw4p3uk, lenovo i52520m, info len4236pa8, lenovo 4236pa8win81, code rflaplent420i54, lenovo lent4204gb24ghz320gbwin7, lenovo lent4204gb24ghz320gbwin7c, lenovo lent4204gb24ghz320gbwin7ce, lenovo lent4204gb24ghz320gbwin7cer, lenovo lent4204gb24ghz320gbwin7cert, lenovo lent4204gb24ghz320gbwin7certi, lenovo lent4204gb24ghz320gbwin7certif, lenovo lent4204gb24ghz320gbwin7certifi, lenovo lent4204gb24ghz320gbwin7certifie, lenovo lent4204gb24ghz320gbwin7certified
Barcodes 00645743457300, 05060363473779, 07253096159548, 07253291873744

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See How Other Laptops Compare to the Lenovo T420

Lenovo ThinkPad T540 vs Lenovo T420

Lenovo ThinkPad T540 vs Lenovo T420
Lenovo ThinkPad T540
2 core Intel Core i5-4xxx 2.6GHz 4GB 500GB HDD 15.6"
Lenovo T420
2 core Intel Core i5-2xxx 2.4GHz 4GB 320GB HDD 14"
£ 1,048.87
Newer by 20 Months
Longer Battery Life
Fifteen More PCI Express Lanes (max)
Higher Speaker Power
Significantly Slower On-Board Graphics Adapter Base Frequency
Only Two USB 2.0 Ports

Asus X553MA vs Lenovo T420

Asus X553MA vs Lenovo T420
Asus X553MA
2 core Intel Celeron 2.16GHz 4GB 1TB HDD 15.6"
Lenovo T420
2 core Intel Core i5-2xxx 2.4GHz 4GB 320GB HDD 14"
£ 349.99
19 Months Newer
Four PCI Express Lanes (max)
3.5 Mm Jack Headphone Out Ports
Significantly Bigger Total Storage Capacity
"Expert Reviews" Review is Significantly Worse
Four Less Battery Cells

HP ProBook 450 vs Lenovo T420

HP ProBook 450 vs Lenovo T420
HP ProBook 450
2 core Intel Core i3-4xxx 1.9GHz 4GB 500GB HDD 15.6"
Lenovo T420
2 core Intel Core i5-2xxx 2.4GHz 4GB 320GB HDD 14"
£ 439.97
20 Months Newer
12 PCI Express Lanes (max)
A Lot Bigger Maximum Internal Memory
50% Bigger Discrete Graphics Adapter Memory
Three Times Slower On-Board Graphics Adapter Base Frequency
Appreciably Lower User Review Score
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