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  • Crucial CT256M550SSD1 256GB M550 SATA 6Gb/s 2.5 Inch Internal Solid State Drive
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Crucial CT256M550SSD1 256GB M550 SATA 6Gb/s 2.5 Inch Internal Solid State Drive

by Crucial
| 9 answered questions

Price: £106.62 & FREE Delivery in the UK. Details
Usually dispatched within 2 to 5 weeks.
Dispatched from and sold by Amazon. Gift-wrap available.
2 new from £88.00
256 GB
  • Save on power costs and enjoy longer battery life
  • Secure and protect your data with no loss in performance
See more product details
£106.62 & FREE Delivery in the UK. Details Usually dispatched within 2 to 5 weeks. Dispatched from and sold by Amazon. Gift-wrap available.

Frequently Bought Together

Crucial CT256M550SSD1 256GB M550 SATA 6Gb/s 2.5 Inch Internal Solid State Drive + Akasa AK-HDA-03 2.5-3.5 inch SSD/HDD Adapter + 2 x Gigabyte High Quality Original Light Blue SATA 3 6GB/s Cable (46cm)
Price For All Three: £118.59

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Product Information

Size Name: 256 GB
Technical Details
Item Weight82 g
Product Dimensions13 x 1.9 x 13 cm
Item model numberCT256M550SSD1
SeriesM550 CT256M550SSD1
Hard Drive Size256 GB
Additional Information
Best Sellers Rank 17,998 in Computers & Accessories (See top 100)
Shipping Weight82 g
Date First Available10 Mar. 2014

Product Description

Size Name: 256 GB

Product Description

Crucial M550 SSD img1
Do More. Faster. Longer

The Crucial M550 SSD is more than 20 times faster than a typical hard drive* and consumes significantly less power. It enables your computer to boot up almost immediately, load files and programs almost instantly, accelerate demanding applications, and manage power so that your battery lasts up to 50 minutes longer. Backed by advanced feature sets -- Native Write Acceleration, RAIN technology, Adaptive Thermal Protection, hardware-based encryption, and Crucial's data integrity algorithm -- the Crucial M550 delivers a complete performance gain that's measured by far more than just specs.

Micron Quality -- a High Level of Reliability

As a brand of Micron, one of the largest flash storage manufacturers in the world, the Crucial M550 is backed by the same quality and innovation that has produced some of the world's most advanced memory and storage technologies. With more than 1,000 hours of pre-release validation testing and hundreds of SSD qualification tests, the Crucial M550 has been thoroughly tried, tested, and proven for the most demanding applications.

*Performance level based on averaged PCMark Vantage HDD test scores of five leading hard drives compared to the Crucial M550 SSD. Actual performance level may vary based on benchmark used and individual system configuration. Test setup: 256GB Crucial M550 SSD (firmware MU03), 2TB Western Digital WD20EURS 7200RPM hard drive, 2TB Seagate ST2000DM001 7200 RPM hard drive, 1TB Western Digital WD10EZEX 7200RPM hard drive, 750GB Seagate ST3750640AS 7200RPM hard drive, and 500GB Western Digital WD5000AVDS 7200RPM hard drive, all tested on an Intel DZ87KLT-75K motherboard, Intel i7-4770K 3.50GHz processor, BIOS Rev. 0446, and Windows 8 Pro 64-bit operating system using PCMark Vantage HDD test suite. Benchmark testing conducted December 2013.

**Hard drive active average power use based on published specs of 500GB Seagate Momentus 7200RPM internal hard drive for laptops. According to NPD data published in September 2013, this was one of the most popular hard drives available and an accurate reflection of a common internal hard drive for laptops.

Note: All trademarks are property of their respective owners. 1 GB = 1 billion bytes. Actual usable capacity may vary.

Crucial M550 SSD img2
Consistently Fast Speeds. No Exceptions

Every manufacturer has ideas about how to deliver better performance. Some use file compression schemes, but those don't help video, audio, or graphic files that are already compressed. The Crucial M550 treats all files the same, regardless of whether they're compressed or uncompressed, so the specs listed are the same ones you'll see in real world use: true 550 MB/s sequential reads across all file types.

Crucial M550 SSD img3
Achieve Fast Speeds without Sacrificing Reliability

Normally, as an SSD's level of performance increases, its level of reliability decreases. Not so with the Crucial M550. With more than 35 years of defining and refining some of the world's most advanced memory and storage technologies, we leveraged our expertise to create RAIN (Redundant Array of Independent NAND). This technology protects your data at the component level, similar to the way RAID is used with multiple drives.

Crucial M550 SSD img4
Save on Power Costs and Enjoy Longer Battery Life

Run your system for longer -- and use less power. Based on published specs, a common laptop hard drive uses 2.5 watts of power on an average workload, compared to 0.15 watts on the Crucial M550 (which is up to 94% more energy efficient).** In everyday terms, this means significantly more battery life and substantial savings on power costs.

Crucial M550 SSD img5
Secure and Protect Your Data -- with No Loss in Performance

You probably save lots of sensitive and personal information on your computer -- encrypt it and keep it safe. As a self-encrypting drive, the Crucial M550 incorporates a high level of hardware encryption into the controller, allowing the drive to operate at full speed without the performance loss associated with software-based encryption. The Crucial M550 is one of the only drives on the market to meet the rigorous requirements of TCG Opal 2.0, IEEE-1667, and Microsoft eDrive.

Crucial M550 SSD img6
Keep Your System Cool -- Even When You Overwork it

Push your drive to the limit and avoid overheating, even in ultra-small, thermally constrained systems. The Crucial M550 includes Adaptive Thermal Protection technology, which enables the drive to dynamically adjust NAND activity based on usage demands. With this technology, the drive is able to maintain optimal operating temperatures, even when you overwork it.

Crucial M550 SSD img7
Store up to 1TB

Available in capacities up to 1TB, the Crucial M550 provides plenty of space to store large programs and your ever-growing collection of photos, videos, music, and work files. Available in form factors 2.5-inch, mSATA and M.2, the Crucial M550 is designed to go the distance.

Box Contains

1x CrucialM550-256GB SSD

Customer Questions & Answers

Customer Reviews

4.9 out of 5 stars
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Most Helpful Customer Reviews

46 of 48 people found the following review helpful By Mr. Gary Taylor on 30 May 2014
Size Name: 512 GB Verified Purchase
Purchased this to fit into my Mac Book Pro.
My model is a mid 2010 version and was ok but I was thinking of buying the latest Mac Book to replace it. 2 Grand to replace it though so I took the plunge and purchased this model SSD.
Previous boot times were go and make a tea while it loaded, we've all been there lol. After fitting the SSD and I chose to completely reinstall OSX i got boot times of 3 seconds. What a difference. Programs open virtually instantaneously now.
So i reckon Ive saved 1800 quid and a few hundred teabags lol. Definitely recommend.
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25 of 27 people found the following review helpful By Antoine Camilleri HALL OF FAMETOP 10 REVIEWER on 29 July 2014
Size Name: 512 GB
Before tossing away your ageing laptop, you might want to consider upgrading to an SSD. This could work out as a much cheaper option considering that the decreasing prices of SSD drives. I do feel that SSD drives in general are still slightly overpriced when considering the fact that these are now mainstream and no longer belonging to a niche market. Yet to be fair, it could still work out much cheaper than buying a new laptop or desktop computer.

The Crucial M550 is definitely a fast and very reliable drive. It is not the fastest SSD, yet it makes up for that in the reliability department. After all what is the use of having a blazing fast SSD if your data could be compromised. The controller houses an numerous capacitors, so in case of a power failure, there is enough juice stored to write the otherwise lost data. Another crucial factor is that the drive is fail operational. This means that if a single nand fails, the drive will still remain functional. On many SSDs if a nand fails the whole drive fails. This technology is referred to as RAIN (Redundant Array of Independent NAND) or "cross-die redundancy". (It has to be noted that SSDs use nand flash to store data).

• Very fast and reliable drive
• Super easy installation
• Light on batteries (great for laptop use)

I have not disabled indexing on my drive. My system is on 24/7 and the drive has been installed well over a year ago. Drive performs flawlessly.

○ In order to use the drive to its full potential, AHCI Mode must be enabled in the bios, and motherboard should support SATA 3.

SSD technology is the future, and these drives will improve and prices will continue to decrease.

If you need a very fast reliable drive, than the Crucial M550 is worth serious consideration.

Highly recommended
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13 of 14 people found the following review helpful By A. K. Allery on 30 July 2014
Size Name: 512 GB Verified Purchase
Despite the Royal mail trying its level best to destroy the drive by launching it through my letterbox with a slap that saw it land at the far end of the hallway, the packaging did its job and protected the contents. I unpacked it immediately and after a careful visual inspection I donned my anti static wrist band and fitted it to my newly created pc. Firing up the machine for the first time, I watched as the device was recognised then set about installing Windows 8.1. This proved effortless and within a few short minutes, (lost exact time in my excitement), I was staring at the app page. My ancient computer took between 5 and 9 minutes to boot so imagine my delight when the SSD booted in 24 seconds. Apps that took up to a minute to open now take 3 seconds while others are instant.
If I could offer one upgrade that all computers should be treated to it is without doubt a change from HDD to SSD. I wont go back. I chose Crucial as I have used their products before and always offer excellent quality as well as competitive prices.
It has been running for several months flawlessly and I can hardly wait until I am able to install a larger capacity drive as a backup.
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2 of 2 people found the following review helpful By Artless Reader on 4 Dec. 2014
Size Name: 512 GB
At the risk of repeating what everyone else makes clear:

* It boots up my computer (a late-09 i7 iMac) in ten seconds
* Applications open near instantaneously
* I really wish I'd fitted one sooner

I had been concerned about my old 2TB HD for a while. It took forever to boot and seemed to spend a good deal of its time writing to RAM - even when I had no applications open. Some apps required a major commitment to run. I've known marriages that didn't last as long as the time it took Photoshop to open. Now I can just open it (and other formerly ponderous applications) on a whim to edit a Jpeg or whatever. Microsoft Word opens faster than it takes me to say 'Microsoft Word'. Honestly.

Here's what I (or rather the wonderful Bob at AT Computers in Tewkesbury, the best Mac people between Bristol and London) did:

1. Swapped out the 2TB HD with the Crucial 512 SSD
2. Installed Yosemite, Applications and my Home Folder on to it, along with SSD Fan Control
3. Replaced the rarely used DVD Superdrive with a 2TB 2.5-inch drive
4. Partitioned this to hold my 500GB iTunes library, iPhoto Library and a spare Startup disc

This way all the bulky files that don't need or benefit from immediate superfast access aren't clogging the SSD.

I use an external FW800 to make a daily clone of my SSD using Super Duper, and copy my iTunes and iPhoto libraries twice a week. A separate 2TB USB external drive runs the life-saving TimeMachine, and provides another layer of security.

As others have said, it's like having a new computer. I've had no problems with the TRIM command (Google `Trim' + 'Yosemite'), and my iMac is cooler and quieter. It is a staggering improvement.

Go for the largest capacity SSD in your budget.
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