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Rectangular 2.5 inch SSD with black metal casing and Samsung branding

SAMSUNG

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

SKU CH-QE9Z-RGA2D MPN MZ-7KE256BW

A 2.5 inch SATA internal SSD with 256GB capacity, 3D NAND flash, up to 550 MBps read and 520 MBps write speeds, and a 2,000,000 hour MTBF

  • Device TypeInternal Solid State Drive (SSD)
  • Used ForConsumer
  • Form Factor2.5"
  • Capacity256GB
  • Memory Components3D NAND
  • InterfaceSATA III

Options 256GB 850 PRO

  • World's first consumer 3D V-NAND technology for breakthrough density
  • Sequential reads up to 550 MBps and writes up to 520 MBps
  • Random performance reaches 100,000 read IOPS and 90,000 write IOPS
  • MTBF of 2,000,000 hours ensures long-term reliability
  • Low 0.5 W idle and 3.5 W active power consumption

256GB 3D V-NAND SATA SSD

The Samsung 850 PRO MZ-7KE256BW is a 2.5 inch internal solid state drive built for consumer laptops and desktops. It uses 3D V-NAND flash memory and a Samsung MEX controller to deliver up to 550 MBps sequential read and 520 MBps sequential write speeds. The drive targets users who need reliable storage for everyday computing tasks.

Sustained workload behaviour

Under continuous operation the drive draws 3.5W active power and maintains performance within a 0°C to 70°C operating range. Its 3D V-NAND structure provides enhanced endurance rated at 2,000,000 hours MTBF. Random read reaches 100,000 IOPS and random write reaches 90,000 IOPS during extended mixed workloads.

SATA III interface limits

The SATA III interface caps maximum sequential throughput at the stated 550 MBps read and 520 MBps write figures. This bottleneck defines the practical ceiling for large file transfers regardless of the 3D V-NAND capabilities. The drive remains compatible with standard 2.5 inch SATA bays in most current systems.

Highlights

  • World's first consumer 3D V-NAND technology for breakthrough density
  • Sequential reads up to 550 MBps and writes up to 520 MBps
  • Random performance reaches 100,000 read IOPS and 90,000 write IOPS
  • MTBF of 2,000,000 hours ensures long-term reliability
  • Low 0.5 W idle and 3.5 W active power consumption

Specifications

BrandSAMSUNG
Series850 PRO
ModelMZ-7KE256BW
Device TypeInternal Solid State Drive (SSD)
Used ForConsumer
Form Factor2.5"
Capacity256GB
Memory Components3D NAND
InterfaceSATA III
ControllerSamsung MEX Controller
Max Sequential ReadUp to 550 MBps
Max Sequential WriteUp to 520 MBps
4KB Random ReadUp to 100,000 IOPS
4KB Random WriteUp to 90,000 IOPS
MTBF2,000,000 hours
FeaturesThe World's First Consumer 3D V-NAND SSD
Ultimate Read/Write Performance
Enhanced Endurance and Reliability
Efficient Power Management
Power Consumption (Idle)0.5W
Power Consumption (Active)3.5W
Operating Temperature0°C ~ +70°C
Storage Temperature-40°C ~ +85°C
Operating Humidity0% to 95%
Max Shock Resistance1500G
Max Vibration Resistance20G
Height7.00mm
Width70.10mm
Depth100.08mm
Weight0.14 lb.
Shipping weight0.12 kg
Package size150 × 145 × 18 mm

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Questions about this item

How much power does the 850 PRO draw when it runs continuously in a desktop?

The drive draws 0.5 W at idle and 3.5 W during active use, so all-day operation adds only a few watts to the system.

What must my motherboard provide for this 2.5" SATA drive to work?

A standard SATA data port and a SATA power connector from the power supply.

Will the 850 PRO run at full speed if my older board only has SATA II ports?

The drive is backward compatible, but sequential reads will be limited to the SATA II port's maximum bandwidth.

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