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256GB SSD 850 Pro Series

2.5-inch | SATA 6.0Gb/s
The world's first 3D Vertical NAND
Samsung's flash memory is fabricated using an innovative 3D V-NAND architecture, which stacks 32 cell layers on top of one another rather than trying to decrease the cells' length and width to fit today's shrinking form factors. The result is higher density and higher performance using a smaller footprint and a breakthrough in overcoming the density limits of conventional planar NAND architecture.
Shift into high gear with the enhanced RAPID mode
You can kick up the read/write performance on every capacity when you need it with the RAPID mode. Just like shifting gears in a car, Magician software gives you the option to enhance performance by processing data on a system level using free PC memory (DRAM) as a cache, providing 1.8 times faster performance in the RAPID mode.
An SSD that won't quit before you do
With twice the endurance of the previous model, the 850 PRO will keep working as long as you do. Samsung's V-NAND technology is built to handle 150 Terabytes Written (TBW) which equates to a 40 GB daily read/write workload over a 10-year period. Plus, it comes with the industry's top-level ten-year limited warranty.
Work longer with high-efficiency innovation
The efficient, power management components in the 850 PRO enable you work longer and more productively. Boasting the lowest power consumption of any SSD when in full use, the 850 PRO expends less energy while maintaining market-leading performance. The 850 PRO fully supports the sleep mode on the Ultrabook™, consuming only 2 m watts of power. Plus, its LPDDR2 cache memory provides higher performance while consuming 30 percent less power when active and 93 percent less power when idle than typical DDR2 or DDR3 memory.

256GB SSD 850 Pro Series Specifications:


Form Factor
2.5" 7mm (Ultraslim)
SATA 6Gb/s
Formatted Capacity2


Height (max)
7mm (0.275″)
Weight (typical)
66g (0.14 lbs.)


MTBF (Mean Time Between Failures)
2,000,000 hours


Sequential Read (up to)
Sequential Write (up to)
Random Read
Up to 100,000 IOPS
Random Write
Up to 90,000 IOPS


Maximum Start Current, DC
5V ± 5%
Seek Power
0.15 Watts

Environmental (Operating)

Ambient Temperature (°F)
32°F to 140°F
Ambient Temperature (°C)
0°C to 60°C
-304.8 m to 3,048 m (-1,000 ft to 10,000+ ft)

Environmental (Non-Operating)

-304.8 m to 12,192 m (-1000 ft to 40,000+ ft)


Idle (Typical)
0.0 bels
Seek (Typical)
0.0 bels
  1. 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  3. Specific application environments such as temperature and duty cycle will affect the overall reliability rates.
Manufacturer provided specifications for Samsung p/n MZ-7KE256BW UPC#: 887276057484

Customer Ratings

Write a Review 5 / 5 0 out of 1 (0%) reviewers would recommend this product
Verified Buyer
Reviewer: Mservis Location: Medford OR Age: 55-65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Samsung SSD November 8, 2016 It used to be the most bang for your buck upgrade you could get for your mac-book was to max out the memory, but not anymore. SSD's have fallen in price to less than $1 a gig and the performance is like WOW! My old mac book boots in less than 25 seconds and apps open up like they were minimized in the task-bar. The price was right, the install was a no brain-er, and the performance is on par with a new mac-book at 1/10th the price. I'm a happy camper.

I would recommend this item to a friend! This review is from 128GB Samsung 850 Pro Series 2.5-inch 7mm SATA 6.0Gb/s Solid-State Drive. Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Ottawa, ON Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Rock Solid March 20, 2015 This is the boot drive in my Windows Mac Pro. Everything is lickety split and I've had no problems whatsoever. This drive supposedly has a very long life compared to the 840 so I decided to pay more for my main business computer. Drive failures are not something a business needs.

This review is from 1.0TB Samsung 850 Pro Series 2.5-inch 7mm SATA 6.0Gb/s Solid-State Drive.

Samsung 256GB SSD 850 Pro Series Mfr P/N: MZ-7KE256BW MacSales.com SKU: SAMMZ7KE256BW Internal 2.5" Solid State Drive Samsung 10 Year Limited Warranty Ships: Same Day Only $249.99MacSales.com Price $158.99
Add to CartSamsung MZ-7KE256BW In Stock, Click to Buy Now
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