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Rectangular 2.5 inch silver metal SSD with label and SATA connectors

SAMSUNG

SAMSUNG 850 PRO MZ-7KE256BW 2.5" 256GB SATA internal SSD

SKU CH-FF2D-REZCC

A 2.5" 256 GB SATA internal SSD with 3D V-NAND delivering up to 550 MB/s read and 520 MB/s write

  • Total capacity256 GB
  • Sequential read speedUp to 550 MB/s
  • Sequential write speedUp to 520 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)
  • 3D V-NAND enables up to 550 MBps sequential read
  • Samsung MEX controller delivers up to 520 MBps sequential write
  • 100,000 IOPS random read for responsive multitasking
  • 2,000,000 hour MTBF supports long-term reliability
  • 5W idle power reduces system energy draw

Samsung 850 PRO 256GB SATA SSD

The Samsung 850 PRO is a 2.5-inch internal solid state drive with 256GB capacity. It uses 3-D Vertical NAND and a Samsung MEX controller for consumer workloads. The SATA III interface fits standard laptop and desktop drive bays.

2.5-inch form factor with 7mm height

At 7.00mm high, 70.10mm wide and 100.08mm deep, the drive matches the common 2.5-inch sled used in most notebooks and desktops. It weighs 0.14 lb and draws 0.5W idle or 3.5W active. Operating range is 0°C to 70°C at 0% to 95% humidity.

Sequential read up to 550 MBps

Maximum sequential read reaches 550 MBps and sequential write reaches 520 MBps. Random 4KB performance is rated at 100000 IOPS read and 90000 IOPS write. MTBF is 2000000 hours, reflecting the endurance of the 3D V-NAND design.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $80.99
Cheaper than about 78% of the 1,994 comparable items (median $180.49).
Total capacity 256 GB
Lower than about 80% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 550 MB/s
Lower than about 70% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $316.37 per TB
Pricier than about 78% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameSAMSUNG
Product line850 PRO
Model nameMZ-7KE256BW
Total capacity256 GB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 550 MB/s
Sequential write speedUp to 520 MB/s
Random read (4K)Up to 100,000 IOPS
Random write (4K)Up to 90,000 IOPS
Storage
NAND flash type3-D Vertical
Controller chipSamsung MEX Controller
Ports & slots
Interface typeSATA III
Power
Idle power draw0.5 W
Active power draw3.5 W
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width70.1 mm
Product depth100.08 mm
Product weight0.14 lb (0.06 kg)
Environment & compliance
Operating temperature range0 °C to 70 °C
Operating humidity range0% to 95%
More details
Mean time between failures2,000,000 h

Questions about this item

Does the SATA III interface on the Samsung 850 PRO MZ-7KE256BW cap real-world throughput at 550 MBps read and 520 MBps write?

Yes, the SATA III link and the Samsung MEX controller limit sequential speeds to 550 MBps read and 520 MBps write, so sustained transfers will not exceed those figures.

What physical space does the 2.5 inch drive with 7.00 mm height require to fit?

It needs a standard 2.5 inch bay or caddy that accepts a 7.00 mm z-height, 70.10 mm width and 100.08 mm depth.

How is the drive installed and which step is often missed?

Connect the SATA data and power cables, secure the drive with four screws, then initialise and format the 256 GB volume in the operating system before use.

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