We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
Solid-state drives Reviews
15,670 Reviews

Samsung 840 Pro 256GB review

£189 inc VAT

Manufacturer: Samsung

Our Rating: We rate this 4.5 out of 5

Samsung 840 Pro is a superfast, super slim SSD. Here's our Samsung 840 Pro 256GB review.

The Samsung 840 Pro 256GB is the fastest consumer SSD around, and its 7mm thickness makes it compatible with thin-and-light laptops. It also comes with a five-year warranty. Buying advice: Samsung 840 Pro.

It's always easy to write about the best - in this case, the Samsung 840 Pro with its proprietary MDX controller. Samsung also manufactures the toggle-mode MLC memory found in the 840 Pro, and judging from the results of our tests, the company knows what to do with it. See also: Samsung SSD 840 Pro 256GB review: the fastest SSD currently around and Samsung SSD 840 250GB review: affordable and fast?

The Samsung 840 Pro is the best SSD we have tested recently in terms of overall combined reading and writing. It also placed first in three of our four individual read and write tests. See all storage reviews.

Samsung 840 Pro 256GB review: test results


Samsung 840 Pro test results

Samsung's model 840 Pro is the fastest 240GB SSD we've tested.

By the numbers, the 840 Pro wrote our 10GB mix of files and folders at 417.7 MBps, and it read them at 419.8 MBps. It wrote our single large 10GB file at a whopping 665.3 MBps, and read the file back at 482.9 MBps.

That's an average read speed of 450.8 MBps, an average write speed of 541.5 MBps, and 496.2 MBps combined reading and writing. Impressive results; only OCZ's Vector could hang with it.

The 256GB 840 Pro we tested sells for around £189, or 74p per gigabyte, which is more than the average, but a decent price for this level of performance. Samsung includes an installation guide and a CD containing its Magician toolkit software. Magician does benchmarking, and it enables the TRIM command if you're still using Windows XP (that operating system doesn't support TRIM natively). The drive is warrantied for five years.

Samsung 840 Pro 256GB Expert Verdict »

Samsung SSD 840 Pro Series Basic (256GB) reviews verified by Reevoo

Samsung SSD 840 Pro Series Basic (256GB)Scores 9.1 out of 10 based on 248 reviews
Solid state drive - internal
Ultra Slim Line
Serial ATA-600
TRIM support, Garbage Collection technology, S.M.A.R.T.
1 x Serial ATA-600
Drivers & Utilities, Samsung Smart Migration Software
5 years warranty
  • Overall: We give this item 9 of 10 overall

The Samsung 840 Pro is currently the fastest consumer SSD on the market. You'll pay a little more for it, but you always pay more for the best.

  • SanDisk Extreme 240GB SSD review

    SanDisk Extreme 240GB SSD

    The SanDisk Extreme is a 240GB SSD that offers good value for money. Here's our SanDisk Extreme 240GB SSD review.

  • Samsung 840 EVO 750GB review: a triumph in solid-state technology

    Samsung 840 EVO 750GB: a triumph in solid-state technology

    The Samsung 840 EVO 750GB is a triumph in solid-state technology, combining for the first time vast capacity by flash standards, with lightning performance, and at an approachable price. Read our Samsung 840 EVO 750GB review to find out more.

  • Seagate 600 SSD review - great consumer solid-state drive

    Seagate 600 SSD - great consumer solid-state drive

    The Seagate 600 SSD is a great consumer-oriented first effort. Here's our Seagate 600 SSD review.

  • Samsung 840 Series 250GB review

    Samsung 840 Series 250GB

    Samsung's 840 Series is the cheaper version of the Samsung 840 Pro Series, using the latest lower-cost TLC flash chips to keep the price down while still taking many of the performance features of the Pro product.

  • OCZ Vector 256GB SSD review

    OCZ Vector 256GB SSD

    If you're an enthusiast looking for top performance, the OCZ Vector is a 256GB SSD drive you should be thinking about. Here's our OCZ Vector 256GB SSD review.

IDG UK Sites

Android M Developer Preview announced at Google I/O: Android M UK release date and new features. Wh?......

IDG UK Sites

Why I think the Apple Watch sucks and you'd be mad to buy it

IDG UK Sites

Ben & Holly's Game of Thrones titles spoof is delightfully silly

IDG UK Sites

Mac OS X 10.11 release date rumours: all the new features expected in Yosemite successor