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SAMSUNG

SAMSUNG 850 EVO mSATA 250GB internal SSD MZ-M5E250BW

SKU CH-6KMW-YTDKF MPN MZ-M5E250BW

mSATA internal SSD with 250 GB capacity, 3D NAND, up to 540 MB/s read and 520 MB/s write for ultra-thin laptops

  • Total capacity250 GB
  • Sequential read speedUp to 540 MB/s
  • Sequential write speedUp to 520 MB/s
  • Interface typeSATA III
  • Form factormSATA
  • Product typeInternal SSD Single Unit Version

Capacity 250GB

  • Fast boot and load times with up to 540 MBps sequential read
  • Responsive multitasking from up to 97,000 IOPS random read
  • Sustained write performance up to 520 MBps sequential write
  • Low 50 mW idle power extends laptop battery life
  • Slim 4.90 mm mSATA form factor fits ultra-thin laptops

250 GB mSATA SSD for ultra-thin devices

This 250 GB mSATA solid-state drive uses Samsung 3D V-NAND and a SATA III interface to deliver up to 540 MBps sequential read and 520 MBps sequential write speeds. It targets ultra-thin laptops and compact PCs that require a plug-in module form factor with low idle power draw. The drive includes Samsung Data Migration and Magician software for setup and maintenance.

Check mSATA slot and SATA III support

Before ordering, confirm that the host system provides an mSATA connector wired to a SATA 600 controller and that the BIOS or UEFI recognises bootable mSATA devices. The module measures 4.90 mm in height and 29.90 mm in width, so verify the socket clearance inside the chassis. Ensure the operating system can address a 250 GB volume without additional drivers.

Sustained performance and power behaviour

Under continuous workloads the controller manages thermal output while maintaining up to 97,000 IOPS random read and 88,000 IOPS random write performance. Active power consumption reaches 3.5 W during reads and 4.3 W during writes, dropping to 50 mW at idle. The 512 MB buffer helps smooth extended write sequences without the sharp throttling seen in short-burst benchmarks.

How it compares

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

Price $85.99
Cheaper than about 77% of the 1,994 comparable items (median $180.49).
Total capacity 250 GB
Lower than about 84% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 540 MB/s
Lower than about 83% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $343.96 per TB
Pricier than about 80% of the 1,362 comparable items (median $165.50 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSAMSUNG
Product line850 EVO
Model nameMZ-M5E250BW
Part numberMZ-M5E250BW
Total capacity250 GB
Product typeInternal SSD Single Unit Version
Performance
Sequential read speedUp to 540 MB/s
Sequential write speedUp to 520 MB/s
Random read (4K)Up to 97,000 IOPS
Random write (4K)Up to 88,000 IOPS
Storage
NAND flash type3D NAND
Controller chipMGX
Cache memory0 MB
Ports & slots
Interface typeSATA III
Power
Idle power draw50mW
Active power drawRead: 3.5 W
Write: 4.3 W
Size & build
Form factormSATA
Overall height4.9 mm
Overall width29.9 mm
Product depth50.8 mm
Product weight0.02 lb (0.01 kg)
Shipping weight0.07 kg
Package size142 × 99 × 20 mm

Other versions of this model

3 more in the same range

Questions about this item

Does the MZ-M5E250BW include cables or mounting brackets, or must they be purchased separately?

The single-unit version ships as the bare mSATA module only. No cables, brackets or adapters are included; these must be sourced separately if the target system does not already provide an mSATA slot.

The spec sheet shows a 250 GB capacity with 3D NAND and a 512 MB buffer — is this the only version available for this model?

MZ-M5E250BW identifies the 250 GB variant of the 850 EVO mSATA line. Other capacities exist under different part numbers, but this specific model is offered only in the 250 GB configuration.

In a laptop with a SATA III mini-SATA slot, will I see the advertised 540 MB/s read and 520 MB/s write speeds?

The drive can deliver up to 540 MB/s sequential read and 520 MB/s sequential write over the SATA 6 Gb/s link. Real-world throughput depends on the host controller, file system overhead and thermal conditions, so sustained speeds may be lower.

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