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Cus Lenovo Thinkpad T420 Laptop (Black) Used

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IBM Lenovo T420 Laptop Core i5-2520M 2.45Ghz # 4 GB Ram # 500 Hard disk # Cam(used) (id: 127)

  • Packaged Quantity:1
  • Platform Technology: Intel vPro Technology
  • Built-in Devices: ThinkLight
  • Embedded Security: Trusted Platform Module (TPM 1.2) Security Chip
  • Notebook type: Midsize, HD display
  • Manufacturer: Lenovo

Processor / Chipset

  • CPU : Intel Core i5 (2nd Gen) -2.6 GHz
  • Max Turbo Speed

3.3 GHz

  • Number of Cores: Dual-Core
  • Cache

3 MB

  • 64-bit Computing: Yes
  • Chipset Type

Mobile Intel QM67 Express

  • Features: Hyper-Threading Technology, Intel Turbo Boost Technology 2.0, integrated memory controller

Cache Memory

  • Installed Size: 3 MB


  • Memory Speed

1333 MHz

  • Memory Specification Compliance


  • Technology


  • Installed Size

4 GB


  • Interface

Serial ATA-300 

Capacity: 500 GB


  • Max Supported Size

8 GB

  • Technology


  • Speed

1333 MHz / PC3-10600

  • Form Factor

SO-DIMM 204-pin

  • Slots Qty



  • LCD Backlight Technology

LED backlight

  • Resolution

1366 x 768 (HD)

  • Widescreen Display


  • Image Aspect Ratio


  • Monitor Features


  • Type


  • Diagonal Size (metric)

35.5 cm

  • Display Resolution Abbreviation


Audio & Video

  • Graphics Processor

Intel HD Graphics 4000

  • Integrated Webcam


  • Capture Resolutions

1280 x 720

  • Sound

Stereo speakers, stereo microphone

  • Audio Codec


Hard Drive

  • Spindle Speed

5400 rpm

  • Type


  • Capacity

500 GB


  • Type

TrackPoint, UltraNav, keyboard

  • Features

multi-touch touchpad, spill-resistant, volume control


  • Wireless Protocol


  • Wired Protocol

Gigabit Ethernet


  • Type

2nd Gen Core i5

  • Generation: 2
  • Manufacturer


  • Clock Speed: 2.6 GHz


  • Capacity

57 Wh

  • Cells


  • Technology

lithium ion

Card Reader

  • Type

4 in 1 card reader

  • Supported Flash Memory

MultiMediaCard, SD Memory Card, SDHC Memory Card, SDXC Memory Card

AC Adapter

  • Input

AC 120/230 V (50/60 Hz)

  • Output

65 Watt

Connections & Expansion

  • Expansion Bays

1 x Ultrabay Enhanced

  • Slots

1 x ExpressCard/34 (1 free)

  • Interfaces

2 x USB 2.0
Headphone/microphone combo jack
PoweredUSB 2.0

  • Memory Card Reader

4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card)


  • Brand


  • Product Line

Lenovo ThinkPad T420

  • Model


  • Packaged Quantity


  • Compatibility



  • Data Link Protocol

Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n

  • Compliant Standards

IEEE 802.1Q, IEEE 802.1p, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ae, IEEE 802.3az, IEEE 802.3i, IEEE 802.3u, IEEE 802.3x

  • Ethernet Controller(s)

Intel 82579LM


  • Platform Technology

Intel vPro Technology

  • Notebook Type


  • Platform


  • Hard Drive Capacity

320 GB

  • Embedded Security

Trusted Platform Module (TPM 1.2) Security Chip

  • Security Devices

fingerprint reader


  • Case Material

carbon fiber, carbon fiber reinforced plastic, glass-fiber

  • Integrated Options


  • Security

Trusted Platform Module (TPM 1.2) Security Chip, fingerprint reader

  • Features

Intel Active Management Technology (iAMT), ThinkPad Roll Cage, ThinkVantage Active Protection System, administrator password, hard drive password, power-on password, security lock slot (cable lock sold separately)

  • Compliant Standards


  • Included Accessories

power adapter


  • Diagonal Size

14.1 in

Dimensions & Weight

  • Width

13.4 in

  • Depth

9.2 in

  • Height

1.2 in

Audio Output

  • Compliant Standards

High Definition Audio


  • Chipset Type

Mobile Intel QM67 Express

Environmental Standards

  • EPEAT Level


  • ENERGY STAR Certified


Physical Characteristics

  • Weight

4.78 lbs

Operating System / Software

  • OS Provided: Type

no operating system

Video Output

  • Graphics Processor

Intel HD Graphics 4000

  • Graphics Processor Series

Intel HD Graphics

Notebook Camera

  • Integrated Webcam





  • Manufacturer





Review Lenovo Thinkpad T420 Notebook

Martina Osztovits (translated by Liala Stieglitz), 04/13/2011

An invariable constant. The tried and tested Thinkpad design has practically remained untouched on the outside. But from now on, the new Sandy Bridge hardware does its job inside the T420. Moreover, the compact office laptop boasts with an excellent communication configuration for the professional field.


Lenovo has doubtlessly made a name for itself in the business field with the Thinkpad notebooks. The T-series wants to "offer the best security, manageability, services and support" according to Lenovo's homepage, and thus sets itself apart from the top of the significantly stronger W-series. In return, the X-series scores with a greater mobility.

Our test device is the 14 incher from the T-series, called T420. Adjacently, the 15 inch model, T520, is also offered and in review at the same time. Essentially, the Tx20 laptops only differ from the previous models, called T410 and T510, by a hardware refresh to the new Sandy Bridge processors.

The test device's full name is T420 4236-NGG. Inside an Intel Core i7 2620MCPU does its job. The incorporated graphics chip, Intel HD Graphics 3000, is exclusively available for video output in our test model. This configuration is supported by a four gigabyte DDR3 main memory and a fast 500 GB hard diskwith a revolution speed of 7200 rpm. Aside from various Core i processors, the T420 is also available with a dedicated NVIDIA NVS 4200M graphics card and Optimus technology – at least in the USA. Consequently, the rating of performance contingent parts is dependent on the real configuration and can't necessarily be applied to other models.

The Thinkpad T420 can practically be seen as an immediate opponent of the basically similarly configurable Latitude E6420 from Dell. While Dell has opted for a completely new design, Lenovo contrarily sticks to the tested and tried Thinkpad design for the Thinkpad T420. We will show to what extent both vying notebooks differ in detail.


14 or 15 inch, the looks have been maintained
14 or 15 inch, the looks have been maintained

At first glance, The T420 doesn't seem to differ from the T410 much. But this is deceptive. For one thing, the display's diagonal has slightly shrunk from 14.1 inches to 14 inches. The same applies for the laptop's height and width, whereas the depth has interestingly gained a bit. The measurements for comparison: 30.5x340.5x233mm for the T420 and 32x336x239 for the T410.

Albeit, as we will see in a moment, quite a few changes have been made on connectivity, Lenovo sticks to the proven, light clamshell design. No modifications can be found in color or material choice, either. The almost completely black case has been made from plastic. The haptics correspond to the choice of materials. However, the matt and slightly roughened surfaces don't feel unpleasant.

The case's stability is basically satisfying. But it still shows the same weaknesses known from the T400. So, in the Ultra Bay slot's area and on the plastic cover above the keyboard. The case can yield somewhat and creak under selective pressure.
The display components stand up well to our warp and pressure tests. It hardly bends when the case is lifted up at its edges. The hinges are first give in before image distortions turn up under selective pressure. In return, the display bezel yields evidently when pressure is applied and allows image deviations to become visible.

We like the metallic hinges that hardly teeter after adjusting the opening angle. Surprisingly, they don't cope well in shaky work conditions (train journey). Since they are smooth and the base unit is sufficiently heavy, both single-handed opening and closing are possible. The maximum opening angle of even a bit more than 100 degrees doesn't cause any restrictions in any case.

In addition to the clamshell design, the ramshorn hook contributes to safety during transportation. It keeps the device securely closed and can be opened easily with the slider on the front edge.



Let's start with a tour around the device itself. We notice that the positioning favors right handed users a bit. Depending on the utilization of single ports, a few cables can gather on the left, which may considerably obstruct the work area on the laptop's left. Two of the five USB 2.0 ports, the display port, the VGA and the RJ45 are found on the left's center edge.

In opposition, Lenovo has taken care to place potentially permanently occupied ports, such as the other two USB 2.0 ports and the eSATA/USB combo port, in the right's rear area in the interface arrangement. In addition, the right accommodates, from front to back, a 3.5mm combo audio socket, the optical drive in an Ultra Bay slot, a 4in1 cardreader that supports SD, MM, SDHC, SDXC, and an ExpressCard34 port.

The rear is completed by a powered USB 2.0 port and a RJ11 modem socket. The power adapter is also connected on the case's rear.

To our regret, Lenovo forgets, like Dell in its E6420, to install a USB 3.0 port in the course of the refresh. Although the eSATA interface also bids a higher data transfer rate than USB 2.0, increasingly more external mass memories are being offered with USB 3.0 ports and eSATA is disappearing little by little from the market. In comparison to the competition, we also notice that Dell relies on the utilization of a HDMI port in the E6420 and thus accepts the according restrictions. In opposition, Lenovo remains resolute in installing a display port directly on the device.

Compared with its predecessor, the T410, hardly anything of significance has been changed. Merely a powered USB interface has been added. Moreover, the interface layout has been revised, but not really improved. So, if you find cables in the work area beside the laptop disturbing, or if you don't want to re-connect all the cables after mobile use, you can make use of a docking solution. The correlating docking port is, as usual, on the notebook's bottom.
Talking about docking stations – it remains interesting to see which docking solutions will find their way to Europe. Currently, two models are available for the T420 in the USA: The ThinkPad Mini Dock Plus Series 3 (US/Canada/LA) (-> manufacturer's information) for about 250 US dollars. It allows connecting three additional external monitors in addition to the installed display. Secondly, the ThinkPad Port Replicator Series 3 (-> manufacturer's information) for about 280 dollars.

Front: Slider for opening
Front: Slider for opening
Left: Fan, VGA, RJ45 (LAN), two USB 2.0s, hard disk slot
Left: Fan, VGA, RJ45 (LAN), two USB 2.0s, hard disk slot
Rear: RJ11, powered USB, battery, power socket, fan
Rear: RJ11, powered USB, battery, power socket, fan
Right: Audio combo socket, optical drive, ExpressCard34, 4in1 cardreader, USB 2.0, USB/eSATA combo port, Kensington Security slot
Right: Audio combo socket, optical drive, ExpressCard34, 4in1 cardreader, USB 2.0, USB/eSATA combo port, Kensington Security slot


Alike the T410, our T420 test sample scores with an extensive communication configuration. Everything that is useful and available is installed. A Bluetooth module version 3.0 is optional, and installed in our test device. It allows data exchange with small, portable devices, such as PDA or mobile phones. Just as optional is a mobile broadband module (F5521gw Mobile Broadband) also installed in our Thinkpad. The correlating SIM slot is located in the battery compartment. The matching antenna cables are present so that a UMTS/HSPA module can be retrofitted later. In regards to WLAN, various options are given. An Intel Centrino Ultimate-N 6300 AGN (agn) module is in the test device. The laptop can be linked to Ethernet networks via the Intel 82579 LM Gigabyte Network Connection. Video conferences aren't a problem anywhere with the (optional) 720p HD camera and this configuration.


In addition to the obligatory Kensington Lock, the T420 also has a fingerprint reader, among other things. A splash waterproof keyboard saves data from loss in case of mishaps with liquids.


Besides the necessary paraphernalia, such as power adapter and battery, only a bit of printed information is included in the scope of delivery. The user should create recovery DVDs for the pre-installed Windows Professional 64bit immediately after purchase. This isn't a problem with the convenient ThinkVantage tool, though.


The standard warranty for the T-range is three years in Europe. The basic warranty only includes a one year bring-in service in the USA. Various warranty extensions can be purchased optionally.

Input Devices


Neither design nor layout has been modified in comparison to the T410. Apart from the exchanged STRG and FN keys, we are dealing with a standard layout with clearly arranged key grouping. The blue ThinkVantage key is again the most striking additional key. It opens the well arranged ThinkVantage tools, respectively a recovery process can be started while booting. Just left of it are a mute button for the speakers and microphone and a rocker for volume control. The keyboard's illumination is integrated in the upper display bezel, as it was in the T410. It can be turned on/off with the FN+PGUP keys. The light can help you find your way around the input devices in complete darkness, but it can't hold a candle to backlit keyboards in our opinion.

Prolific typists will find the Thinkpad keyboard very pleasing due to its mechanical qualities, well dosed key drop and clear pressure point. Additionally, concave keys add to typing comfort. Unfortunately, the keyboard gets quite loud especially during energetic typing. Nevertheless, touch-typing isn't a problem right from the start.

Touchpad and Trackpoint

The similarities to the T410 are just as striking here. The touchpad and trackpoint can be independently disabled and enabled via F8+FN. The touchpad proves to have a pleasantly roughened surface with good gliding traits. The mouse cursor control is, again, accurately possible without problems and the multi-touch features respond as expected. Moreover, scrolling via scroll fields at the touchpad edge is also possible. The touchpad's borders can hardly be distinguished from the surrounding case due to a simple component joint.
The correlating buttons need a bit of getting used to since they are on the beveled edge. They are smooth, respond well over their entire breadth and don't click too loud, either.

Alternately, there is also a red trackpoint. It allows just as precise navigating of the mouse cursor. The correlating buttons are fairly quiet. There are no complaints in regards to functionality, either.



Instead of the 16:10 format as in the T410, a 16:9 aspect ratio is now used. The display diagonal has been marginally reduced from 14.1 inches to 14 inches. In return, the resolution has been increased from 1440x900 pixels to 1600x900 pixels. Thus, there are now so many pixels in the total height as in the previous model. However, the test device has gained a bit of width.

As it isn't expected differently from a business device, the display surface has been AR coated. The device thus not only meets the requirements on display workstations, but also is more suitable for outdoor work.

The T420 has generally improved in comparison to the T410 in terms of assessments. It is brighter and illuminated more evenly. Merely the black value is slightly lower than in the prior model. Nevertheless, the better brightness results in a somewhat higher contrast.

In contrast, the E6420 scores with a significantly higher maximum brightness of 320 cd/m2 and still 277.7 cd/m2 on average. In return, Dell's laptop has to admit clear defeat in the field of black value and contrast.

Distribution of brightness
Gossen Mavo-Monitor
Maximum: 223 cd/m² Average: 206.7 cd/m²
Brightness Distribution: 85 %
Contrast: 162:1 (Black: 1.38 cd/m²)

As you can see in the comparison pictures, which have been made with various ICC color profiles, The T420 hasn't been designed for professional image editing. AdobeRGB and sRGB aren't covered. Thus, it is in the same league as Dell's E6420 with the same display size and resolution. Differences in view of color reproduction become visible in comparison with especially high quality screens. They can be found, for example, in Apple's MacBook Pro 13 or in Dell's XPS 15. Even the T420's bigger brother, the T520, scores better here.

T420 vs. sRGB (transparent)
T420 vs. sRGB (transparent)
T420 vs. AdobeRGB (transparent)
T420 vs. AdobeRGB (transparent)
T420 vs. Dell Latitude E6410 (transparent)
T420 vs. Dell Latitude E6410 (transparent)
T420 vs. Apple MBP 13 (transparent)
T420 vs. Apple MBP 13 (transparent)
T420 vs. Dell XPS 15 (transparent)
T420 vs. Dell XPS 15 (transparent)
T420 vs. Thinkpad T520 (transparent)
T420 vs. Thinkpad T520 (transparent)

With an anti-reflective surface and an average brightness of over 200 cd/m2, which is also available in battery mode, the test model is pretty suitable for outdoor use. The display content even stays fairly legible in direct sunlight.

Sun – front
Sun – front
Sun – side
Sun – side

The last point we look at for rating a screen is its viewing angle stability. It turns out to our satisfaction horizontally and the image can be recognized even in very narrow angles without ado. As usual in the majority of laptops, the viewing angles along the vertical plane are considerably lower in the T420. Consequently, you can take it for granted that frequent viewing angle adjusting will be necessary to ensure a well legible image, especially during outdoor use. When several people are looking at the screen at the same time, their eyes should be at about the same height.

Viewing angles: Lenovo Thinkpad T420 4236-NGG
Viewing angles: Lenovo Thinkpad T420 4236-NGG


Currently, various models with Core i5 or i7 of the second generation are being offered. To be exact, our test model was equipped with an Intel Core i7 2620MSandy Bridge CPU. It is presently the fastest dual core processor from the Sandy Bridge family that was introduced at the beginning of 2011. It can process up to four threads at the same time thanks to Hyper Threading. The Turbo Boost technology allows single cores to overclock dynamically from 2.7 GHz up to 3.4 GHz, depending on load and cooling capacity. In comparison to the Arrandale processors, the turbo function has been improved among other things.

System info CPUZ CPU
System info CPUZ Cache
System info CPUZ Mainboard
System info CPUZ RAM
System info CPUZ RAM SPD
System info CPUZ RAM SPD
System info GPUZ
System info DPCLat
System information: Lenovo Thinkpad T420 4236-NGG

The DirectX 10 capable Intel HD Graphics 3000 chip incorporated directly in the processor is available for the video output in our test device. Thus, the graphics performance is about on par with an Nvidia Geforce 310M entry level card. Alike the Latitude E6420, models with an NVIDIA NVS 4200M and Optimus technologyare listed in the USA.

Our T420 has a four gigabyte DDR3 RAM available for the main memory. They are located on one single, inaccessible for the user, chip. Only a second, still unoccupied bank is accessible via the maintenance cover. An intended upgrade can easily be accomplished by the customer. Due to the 64bit Windows 7 Professional operating system, the four gigabyte of main memory can be exploited efficiently, in contrast to a 32 bit version, and there's nothing standing in the way of a RAM upgrade. The processor's memory controller can address a maximum of up to eight gigabyte of DDR3-1066/1333 RAM.

Windows 7 Experience Index
Calculations per second
Memory (RAM)
Memory operations per second
Desktop performance for Windows Aero
Gaming graphics
3D business and gaming graphics
Primary hard disk
Disk data transfer rate
Cinebench R10 Rendering Single CPUs 64Bit
5438 Points
Cinebench R10 Rendering Multiple CPUs 64Bit
11507 Points
Cinebench R10 Shading 64Bit
5566 Points
PCMark Vantage Result   7845 points

Both the processor as well as the application performance is unsurprisingly a bit higher than the E6420 equipped with a Core i3-2310M. The performance rates are according to the expectations on this hardware configuration. Our test candidate achieved a total score of 7845 points, which is especially due to its high communication sub score, in the PCMark Vantage test for rating the overall performance. Thus, it's even on par with stronger gaming machines, like the Asus G73SW (GeForce GTX 460MIntel Core i7 2630QM), in terms of application performance.

Graphic Performance Verdict

The test device still can keep up with gaming machines like the Asus G73SW in regards to application performance. However, in view of the graphics hardware, it doesn't stand a chance in 3D performance as we expected right from the start. That is confirmed by the results in the Cinebench Shading Test and the various 3DMark benchmarks.

Unfortunately, the test results are beneath those that would be expected for a HD Graphics 3000. However, since the power measurements always remain under par, we have to reckon with a defective device. Another indication for this is that the device detection of the ThinkVantage Tools fails regularly. In order to exclude a problem in the settings we checked the BIOS and the energy settings in Windows 7. We will attempt to attain a replacement device for an update review. We would refer to our detailed test of the Intel HD Graphics 3000 chip and to the HD Graphics 3000's spec sheet for more information.

3DMark 05 Standard   6131 points
3DMark 06 Standard   3381 points
3DMark Vantage P Result   1696 points
Seagate Momentus 7200.4 ST9500420AS
Transfer Rate Minimum: 50.2 MB/s
Transfer Rate Maximum: 102 MB/s
Transfer Rate Average: 79.7 MB/s
Access Time: 16.9 ms
Burst Rate: 81.3 MB/s

Our test device's hard disk is a ST9500420AS from Seagate. It has a gross capacity of 500 GBs, whereas a part is used as a hidden recovery partition. It achieves according results in HDTune and in CrystalDiskMark tests with a revolution speed of 7200 rpm.

DVD burner is also available as another mass storage device. To be precise, it is an Optiarc DVD RW AD-7710H.



System Noise

The T420 always remains fairly quiet regardless of the load. The system noise is a constant 32.2 dB(A) in low load. The hard disk is slightly louder with 32.5 dB(A) during access.
The test laptop just only reaches a maximum noise level of 35.2 dB(A) during our stress test (GPU and CPU in full load). The operating noise thus always stays at an acceptable level. The power consumption assessments (28W max) however indicate that the processor doesn't exploit its maximum possible capacity even during the stress test. Monitoring the processor clock rate with the CPUZ tool recorded the default clock rate of 2.7 GHz for the CPU in the stress test. This means, no overclocking of all four cores and the installed GPU during load. The CPU clocks with 3.19 GHz when only Prime95 is activated. When Furmark is added, the system throttles down to 2.7 GHz.

We can also only record a maximum of 3.19 GHz in Cinebench R10 Single Core rendering. The clock rate meter stays at the same level in multi core rendering. The i7-2620M's maximum possible clock rate of 3.4 GHz is consequently not exploited in any tested state. Nevertheless, the benchmark results that are determined in Cinebench R10 stay within the i7-2620M CPU's expected range and don't show any irregularities in regards to a possible throttling.

Cinebench R10 SingleCore rendering @ 3.19 GHz
Cinebench R10 SingleCore rendering @ 3.19 GHz
Cinebench R10 MultiCore rendering @ 3.19 GHz
Cinebench R10 MultiCore rendering @ 3.19 GHz
Prime95 stress test @ 3.19 GHz
Prime95 stress test @ 3.19 GHz

Technical data

This Is a Used Product Yes
30 days replacement warranty &1 year labour warranty . Yes
manufacturer warranty No
Imported Products we pack safely box wont Come import model
500 RS ADVANCE TO PAY FOR COD delivery 5days TIME Yes

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