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Samsung MZ-7TD250BW 840 Series Solid State Drive (SSD) 250 GB Sata 2.5-Inch

4.6 out of 5 stars 1,625 customer reviews
| 127 answered questions

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250 GB
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  • Optimized to improve everyday PC productivity, including web-browsing, email, multimedia and gaming
  • Enables you to boot up your computer in as little as 15 seconds
  • Energy efficient - improves battery life by up to 50 minutes
  • Solid-state design provides greater shock protection for data and brushed metal case blocks dust and corrosion
  • Worry-free data security with AES 256-bit full-disk encryption
  • Superior multi-tasking performance with 4th-generation 3-Core Samsung MDX Controller
  • 100-percent genuine Samsung components from the #1 memory manufacturer in the world
  • Backed by a three-year limited warranty
1 new from $406.59 3 used from $120.00

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Product Description

Capacity: 250 GB

Product Description

Upgrading your PC with a Samsung 840 SSD is the most economical way to breathe new life into an aging PC. The 840 reads, writes and multi-tasks at incredible speeds, enhancing boot-up speed, application loading and multi-tasking performance. It's more than an upgrade, it's a complete transformation of your PC.

From the Manufacturer

Upgrading your PC with a Samsung 840 SSD is an economical way to breathe new life into an aging PC. The 840 reads, writes, and multi-tasks at incredible speeds, enhancing boot-up, application loading, and multi-tasking performance. No moving parts means no hard drive spin ups, no noise, and superior data protection. This version of the 840 Series SSD has a capacity of 250 GB.

840 Series SSD

Boots up, downloads files, and performs everyday computer tasks more quickly than typical hard disk drives. View larger.

840 Series SSD840 Series SSD840 Series SSD
Fast Performance for Downloads, Gaming, and More

With Samsung's 840 Series SSD, everyday tasks on your desktop or laptop PC can become faster and smoother. This SSD provides exceptional read, write, and multitasking speeds, allowing you to run applications, quickly download graphics, play memory-intensive computer games, and access all your files with less waiting. In addition, the 840 Series SSD enables your PC to boot up in as little as 10 seconds.

Engineered for Reliability to Keep Data Secure

To ensure exceptional quality and reliability, the 840 Series SSD was designed and built completely in-house using advanced memory technology and 100-percent genuine Samsung components.

Additionally, the 840 Series SSD has no moving parts, which means no hard drive spin ups, no noise, and superior data protection. The SSD also offers AES 256-bit full disk encryption for worry-free data security.

Thin, Lightweight Design and Low Battery Consumption

At only 7 millimeters thick and weighing just 2 ounces, the 840 Series SSD has a sleek, lightweight design that can make your laptop lighter to carry.

And because it contains no moving parts and features an ultra-efficient design, the 840 consumes little battery power, letting you enjoy up to 50 minutes more laptop battery life than a standard hard disk drive (HDD) or solid state drive (SSD)*. It also supports Device Sleep mode for Microsoft Windows 8 and Haswell chipsets, which helps reduce overall power consumption.

Data Migration Software Included for Easy Data Transfer

Samsung's Smart Data Migration software is included to make it safe and easy to migrate your data and operating system from your existing drive to the 840 Series SSD.

Product and Warranty Information

This SSD has a usable capacity of 250 GB, offers 512 MB of Samsung DDR2 SDRAM cache memory, and has a SATA 6b/s interface that is compatible with SATA 3 Gb/s and SATA 1.5 Gb/s. It measures 7.00 by 69.85 by 100.00 millimeters (H x W x D) and weighs just 62.5 grams.

The 840 Series SSD is backed by a three year warranty.

What's in the Box

840 Series SSD, Samsung Smart Data Migration Software, Samsung SSD Magician software, manual CD, and quick user manual.

Samsung Logo
Samsung 840 Series 250 GB SSD
At a Glance:
  • Boot up your PC in as little as 10 seconds
  • Allows you to breathe new life into an aging PC--enhancing boot speeds and application performance
  • Energy-efficient design for up to 50 minutes longer battery life*
  • AES 256-bit full disk encryption for ultimate data security
  • Comes with Samsung Smart Data Migration software
  • Three-year limited warranty
Samsung 840 Series Solid State Drives
Capacity120 GB250 GB500 GB
Drive OnlyMZ-7TD120BWMZ-7TD250BWMZ-7TD500BW
Drive and Installation KitMZ-7TD120KWMZ-7TD250KWMZ-7TD500KW
Type of DriveSolid State Drive (SSD)
Form Factor2.5-inch (Reduced 7mm thickness for use with ultraportables and netbooks)
For Use WithDesktop and laptop PCs (including ultraportables and netbooks)
InterfaceSATA 6Gbits/s (backwards compatible with SATA 3Gbits/s and SATA 1.5Gbits/s)
Random Read Speeds***86K IOPS96K IOPS98K IOPS
Sequential Read/Write Speeds530 MB/s / 130 MB/s540 MB/s / 250 MB/s540 MB/s / 330 MB/s
Controller3-Core Samsung MDX Controller
Type of NAND Flash2xnm Samsung Toggle DDR 2.0 NAND Flash Memory (400Mbps)
Type of Cache256MB Samsung LPDDR2 SDRAM512MB Samsung LPDDR2 SDRAM
Dimensions0.28 by 2.75 by 3.94 in. (H x W x D)
Warranty3-Year Limited

*Up to 50 minutes longer battery life versus standard HDDs and some competitor SSDs

***4K Random Read (QD32)

Product Information

Capacity:250 GB

Technical Details

Collapse all
Summary : Screen Size, Screen Resolution, Graphics Coprocessor, Graphics Card RAM
Hard Drive 250 GB 250GB
Brand Name Samsung
Item model number MZ-7TD250BW
Hardware Platform PC, Mac, Unix, Linux
Operating System N/A
Item Weight 1.9 ounces
Product Dimensions 3.9 x 2.8 x 0.3 inches
Item Dimensions L x W x H 3.94 x 2.75 x 0.28 inches
Color Black metallic
Flash Memory Size 250
Hard Drive Interface Serial ATA-600, Serial ATA-300, Serial ATA-150

Additional Information

Customer Reviews
4.6 out of 5 stars 1,625 customer reviews

4.6 out of 5 stars
Best Sellers Rank #263 in Computers & Accessories > Data Storage > Internal Solid State Drives
Shipping Weight 4.8 ounces
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available October 9, 2012

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 500 GB
First of all, the Samsung 840 uses triple-level cell (TLC) memory vs. the multi-level cell (MLC) memory used for almost all other SSDs. So what is the difference between TLC and MLC? With TLC memory, 3 bits of information (8 possible values) are stored per cell instead of the 2 bits (4 possible values) in MLC memory. This might sound better but it also means that the cells are used more and there is less voltage fault tolerance. In the most simple terms, you can think of cells being "filled" or "emptied" by applying voltage. When 3 bits (8 possible values) of information are stored per cell, the SSD may have to apply voltage to the entire cell multiple times even though just one bit of information is encoded (depending on the bit being changed). The multiple voltage applications to each cell also slows down the write speeds and causes more wear in general.

Performance-wise, the Samsung 840 is actually worse than the previous generation Samsung 830. On the Passmark benchmarks, it is slightly lower than the OCZ Agility 4 which uses asynchronous MLC NAND flash.

Right now, the top three SSDs (best selling and best reviews) on Amazon are the OCZ Vertex 4, Samsung 830, and the Crucial M4. However, all three of these SSDs are cheaper and they perform better than the Samsung 840. Eventually, the TLC NAND should mean that the Samsung 840 will sell for less because less NAND is used. However, it is not worth it right now. To be safe, I would say that you should wait until the drive is at least 10-20% cheaper than the three drives above due to the uncertainty of how it will perform in the long run.

One puzzling thing is that I couldn't find any mean time before failure (MTBF) estimates for the 840, while the MTBF for the 20nm MLC based 840 Pro is 1.
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Size: 250 GB
***UPDATE 12/31/12***
Amazon keeps removing my links in this review, sorry. Also, I notice I had my read and write speeds flopped, this has since been corrected on all my reviews posted for each SSD.

I am an avid MacBook Pro user and do a lot of hardware reviews for Apple products. I was able to get my hands on a dozen or so SSDs and test them out on a 2011 13" MacBook Pro and a 2012 13" MacBook Pro and have posted my results below on speeds, firmware and RMA.

All test were done with the SSD installed in the Main HDD Bay1, not the Optical Bay with SATA III on both the 2011 and 2012 MacBook Pro's. All 3rd party SSDs in Mac's require a Terminal CMD or TrimEnabler App to enable TRIM has OS X doesn't turn this on be fault.


*WRITE: 306.3 MB/s
*READ 486.1 MB/s

SandForce SF-2200

Cannot be updated in OSX natively, you must use a Windows PC or with Bootcamp using the Windows Update Tool found at [...]
Offers Advance RMA? Yes.

Great SSD with good speeds, not faster than the Samsung 830, 840, 840 Pro or OCZ Vertex 4 but faster than the Crucial M4. SandForce based SSD which I've seen performance issues on OS X. As you see from the Benchmarks, all the non SandForce Controlled SSDs tend to performance slower on Mac's, minus the Crucial M4. Reliability seems to be reported good with these drives and users seem to be happy overall.

*WRITE: 265.4 MB/s
*READ: 501.
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38 Comments 218 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 250 GB Verified Purchase
After I bought one to replace the HD in my laptop, I liked it so much, I bought another to replaced the HD in my desktop PC. I could not believe the increase in performance, especially with SATA3.

The instructions that come with it are less than helpful, so here's what I would recommend:

1) Forget about the instructions and the CD that come with it. Just go to the Samsung website ([...]) and download the Magician software and the Data Migration software.
2) Before you do anything, clean up your existing hard drive. Cleanup temporary files, clear browser caches, and get rid of old system restore points. (I would even recommend turning off system restore, but you may want to wait until after you have the SSD installed). Obviously, you'll need to get it below the capacity of the new SSD so everything will fit.
3) Reboot your PC and go into the system BIOS. Make sure your SATA interface is set to use AHCI instead of IDE mode. Reboot.
4) Defrag your hard drive. I recommend Defraggler ([...]).
5) Disable the Windows Disk Defrag automated task (you should not defrag SSDs-- it reduces their lifespan), and uninstall Defraggler if you installed it-- you won't need it anymore.
6) Install the Magician and Data Migration software from the Samsung site. The Magician won't be used until after you have the SSD installed, but you may as well install it now.
7) Shut down any other running programs (backups, Office Apps, browsers, etc.) You don't want your hard drive to be changing at all while you are copying the data to the SSD.
8) Connect the SSD to your computer via an external USB/SATA cable or available SATA connector.
9) Run the Data Migration Tool, to copy the contents of your existing HD (source) to the SSD (target).
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