256GB 2.5-inch SSD840 Pro SATA III(Basic)


256GB 2.5-inch SSD840 Pro SATA III(Basic) Choose a solid state drive that’s perfect for all your business needs. The Samsung SSD 840 PRO delivers the unrivalled user experience that professionals need, giving you high-speed, powerful computing performance and outstanding multitasking. Thanks to world-class Samsung engineering, your reliable SSD drive won’t let you down, either. You can even rest easy with a free 5-year limited warranty. And, thanks to the fact that Samsung SSDs are designed in-house, and the components are built in-house too, you can even enjoy lower power consumption, better energy efficiency and more. 4.797 5 64 reviews

Recycling Batteries Responsibly

  • The European Directive on Batteries and Accumulators aims to minimise the impact of batteries on the environment and encourage the recovery of the materials they contain. In the UK, regulations on the recycling of batteries and accumulators (rechargeable batteries) were Introduced in 2009. The Waste Batteries Regulations aim to significantly increase UK collection and recycling of used portable batteries from 3% in 2007 to 25% by 2012, rising to at least 45% in 2016.

  • The battery symbol on a product or on its packaging indicates that the product must not be disposed of with general household waste. Instead, it is the consumer’s responsibility to dispose of their waste batteries at a designated collection point so that they can be recycled. The separate collection and recycling of batteries at the time of dispo sal will help to conserve natural resources and ensure that they are recycled in a manner that protects human health and the environment. A comprehensive list of battery recycling centres can be obtained from: www.recycle-more.co.uk

  • All Samsung products that are subject to the Batteries Directive are compliant with the UK battery and accumulator Requirements. In accordance with national law, SAMSUNG Electronics (UK) Ltd is a member of an approved batteries producer compliance scheme. This scheme collects, treats and disposes of batteries on Samsung’s behalf.

256GB 2.5-inch SSD840 Pro SATA III(Basic)

RRP £137.99


  • Experience the ultimate high-speed performance
  • Trust in reliable engineering and a 5-year warranty
  • Enjoy enhanced multitasking with Windows 8
  • Benefit from comprehensive in-house design

An essential element for professional computing

An essential element for professional computing
As a perfectionist in search of the best performance and with a desire to be among the best in your field, you deserve Samsung’s SSD 840 PRO. The 840 PRO is the fastest and most-reliable SSD on the market - like nothing you’ve seen before. It assures a top-notch user experience, which guarantees better output on your behalf. The 840 PRO is the best choice for professionals looking to supercharge their workflow.

Unrivaled high performance. The top SSD for the top professionals

Unrivaled high performance. The top SSD for the top professionals
The Samsung SSD 840 PRO is a high-performance SSD designed for power users. Capable of delivering up to 100,000 IOPS, the 840 PRO offers the ultimate performance for power computing when it matters most. Sophisticated performance enhancing features deliver consistent speed for demanding applications under heavy workloads.

Industry-leading reliability

Industry-leading reliability
From the world’s leading storage engineers at the #1 maker of SSD components, Samsung’s SSD 840 Series delivers rock-solid reliability and sustained high performance over time and under heavy use. Additionally, the 840 PRO carries a generous 5-year limited warranty.

Multi-tasking multiplied. A powerful complement to Windows 8

Multi-tasking multiplied. A powerful complement to Windows 8
Outstanding Multi Tasking Performance : Windows 8’s intuitive new Metro UI encourages multitasking. Samsung’s 840 Series SSD ensures users will experience great, lag-free performance when working with multiple applications. Consistently Fast Boot Time : Worn-in Windows installations must manage a plethora of third-party applications, many of which load instructions at start-up. While an HDD will suffer performance deficits over time, the 840 Series industry-leading Random Read Speeds and Latency time ensure that boot times remain fast even after months of heavy OS use and application installs.

A True End-to-End, Integrated Solution

A True End-to-End, Integrated Solution
Samsung SSDs are designed completely in-house. To arrive at the perfect solution, Samsung builds all of the main SSD components itself. The result is enhanced performance with Toggle DDR2 NAND flash, lower power consumption with LPDDR2 cache memory, and better energy efficiency with the 3-core MDX controller.

Toggle DDR2 NAND Flash Memory

Toggle DDR2 NAND Flash Memory
Samsung’s Toggle DDR2 NAND flash chips enable data transfer rates of up to 400 megabits per second (Mbps)-more than three times as fast as previous chips – offering dramatic read speed performance improvements. In addition to performance improvements, the chips also consume less power than competing NAND.

3-core MDX controller

3-core MDX controller
More powerful and energy-efficient than our previous generation controller, the new Cortex-R4 CPU-based Samsung MDX controller accomplishes more under the same power conditions than the previous-generation MCX controller.

Ultra Low Power Consumption for Longer Battery Life

Ultra Low Power Consumption for Longer Battery Life
Samsung has made major leaps forward in power efficiency with the 840 Series.  It boasts the lowest idle power consumption of any SSD*, an extremely important achievement considering that SSDs spend a vast majority of their time sitting idle (a positive side-effect of their extremely fast processing speeds). In fact, Samsung's new MDX controller consumes only 40mwatt of power during idle mode - half that of its predecessor and up to 97% less than other SSD controllers. Further improvements come from the use of LPDDR2 cache memory, which offers higher performance while consuming 30% less power when active and 93% less power when idle than regular DDR2 or DDR3 memory. All of this results in an improvement of up to 30 minutes in battery life over the 830 Series, letting you get more out of your mobile experience. *MobileMark2007 CPU: Intel core-i5-2410M CPU@2.3GHz Chipset: Intel QM67 PCH (Integrated Intel GFX) Memory: 4GB 1067HMHz DDR3

Keep your data safe with Self-Encrypting Drive (SED) Technology

Keep your data safe with Self-Encrypting Drive (SED) Technology
Simply enable an HDD password via your computer’s BIOS, and Samsung’s SSD 840 applies data encryption automatically. You can re-purpose your drive or dispose of your data simply by running a Secure Erase through Samsung’s Magician software. * Features and specifications are subject to change without prior notification.
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tech specs

General Feature

  • Application

    Client PCs, Enterprise Computing 1 (1:For enterprise PC usage(e.g.servers), a minimum of 6.7% over-provisioning(OP) is recommended and can be set through Magician)

  • Capacity

    256 GB (1GB=1 Billionbyte by IDEMA) * Actual usable capacity may be less (due to formatting, partitioning, operating system, applications or otherwise)

  • Form Factor

    2.5 inch Form Factor

  • Interface

    SATA 6Gb/s Interface, compatible with SATA 3Gb/s & SATA 1.5Gb/s interface

  • Dimension (WxHxD)

    100 X 69.85 X 6.8 (mm) Dimension

  • Weight

    Max 53.5g Weight

  • Storage Memory

    Samsung Toggle DDR 2.0 NAND Flash Memory (400Mbps, 2xnm/1xnm)

  • Controller

    Samsung 3-core MDX Controller

  • Cache Memory

    Samsung 512 MB Low Power DDR2 SDRAM cache memory

Special Feature

  • TRIM Support

    TRIM Supported

  • S.M.A.R.T Support

    S.M.A.R.T Supported

  • GC (Garbage Collection)

    Auto Garbage Collection Algorithm

  • Encryption Support

    AES 256-bit Encryption (Class 0)

  • WWN Support

    World Wide Name supported

  • Device Sleep Mode Support




  • Sequential Read

    Up to 540 MB/sec Sequential Read * Performance may vary based on system hardware & configuration

  • Sequential Write

    Up to 520 MB/sec Sequential Write * Performance may vary based on system hardware & configuration

  • Random Read (4 KB, QD32)

    Up to 100,000 IOPS Random Read * Performance may vary based on system hardware & configuration

  • Random Write (4KB, QD32)

    Up to 90,000 IOPS Random Write * Performance may vary based on system hardware & configuration

  • Random Read (4 KB, QD1)

    Up to 9,900 IOPS Random Read * Performance may vary based on system hardware & configuration

  • Random Write (4 KB, QD1)

    Up to 31,000 IOPS Random Write * Performance may vary based on system hardware & configuration


  • Average Power Consumption (system level)

    *Average: 0.15 Watts (Mobilemark2007) * Maximum: 3.64Watts (Seq.Write@IOmeter)* Actual power consumption may vary depending on system hardware & configuration

  • Power consumption (Idle)

    0.02 Watts (Typical, DIPM enabled value) * Actual power consumption may vary depending on system hardware & configuration

  • Allowable Voltage

    5V ± 5% Allowable voltage

  • Reliability (MTBF)

    1.5 Million Hours Reliability (MTBF)

  • Operating Temperature

    0 - 70 ℃ Operating Temperature

  • Shock

    1,500G & 0.5ms (Half sine)


  • Installation Kit

    Not Available


  • Management SW

    Magician Software for SSD management


  • Warranty

    5 Years Limited Warranty ※ For enterprise applications, 5 years limited warranty assumes a maximum average workload of 40GB/day (calculated based on host writes and on the industry standard of 3-month data retention). Workloads in excess of 40GB/day are not covered under warranty.


Owners Overall Ratings

57 out of 64 (89%) customers recommend this product

  • Features4.7/5.0
  • Performance4.7/5.0
  • Design4.9/5.0
  • Value4.4/5.0

Owner Reviews

Sort By
Highest Rated



  • Features5/5.0
  • Performance5/5.0
  • Design5/5.0
  • Value4/5.0

Best performance return of any upgrade

In the past I have upgraded memory, HDD, CPUs etc but this SSD has given the best performance upgrade ever - even the wife noticed it ! Easy to transfer my windows 8 OS on to the SSD with the Samsung supplied software.

This SSD is super fast!

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  • Features5/5.0
  • Performance5/5.0
  • Design5/5.0
  • Value5/5.0

Excellent performer

I replaced a smaller SSD on my desktop with this SSD from Samsung. Since I built the computer the prices of SSDs have continued dropping so that along with an excellent sale was enough reason to upgrade to the Samsung Pro.

The transfer of data from the original SSD to the Samsung was easy and accurate using the included software from Samsung. A big plus was using the included Samsung Magician software to optimize the computer setting for my needs with the new SSD. I am now getting faster boot up and loading speeds while having the confidence in the reliability of a proven top tier product. No issues so far, all is running fast and efficiently.

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Customer review from samsung.com/us/



  • Features5/5.0
  • Performance5/5.0
  • Design5/5.0
  • Value5/5.0

The Best Drive!!

I have used many SSD's and various other drives. None of them even come close to this drive in performance. Not to mention RAPID!! This thing is justthe best drive that i have used EVER.

Boots so fast and stays consistent through out the whole experience. Will be continuing to use Samsung SSD's whenever i can.

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Customer review from samsung.com/us/



  • Features5/5.0
  • Performance5/5.0
  • Design5/5.0
  • Value5/5.0


My speed running a SSD 840 PRO in my SAMSUNG ATIV Book 4

Customer review from samsung.com/us/