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Rectangular 2.5 inch SSD with black metal casing and silver label

SAMSUNG

SAMSUNG 840 Pro MZ-7PD128BW 128GB 2.5" SATA internal SSD

SKU CH-RRW5-M7TJS MPN MZ-7PD128BW

A 2.5 inch SATA solid-state drive with 128GB capacity, MLC memory, 540MBps read and 520MBps write speeds

  • Total capacity128 GB
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)
  • Intended useConsumer
  • NAND flash typeMLC

Capacity 128GB

  • Fast boot and load times with 540MBps sequential read
  • Responsive multitasking from 97000 IOPS random read
  • Reliable storage backed by 1500000 hours MTBF
  • Low power draw of .054W idle extends laptop battery
  • Data protected by AES encryption and TRIM support

Samsung 840 Pro 128GB SATA SSD

The Samsung 840 Pro Series MZ-7PD128BW is a 128GB internal solid state drive built for consumer desktops and laptops. It uses a 2.5 inch form factor and connects through a SATA interface. MLC memory and the Samsung MDX controller provide consistent performance for everyday workloads.

SATA III interface

The drive communicates over SATA III, so it fits any system with a standard 2.5 inch SATA bay or adapter. This single specification determines whether the SSD will install and operate at its rated speeds. No other interface is supported by this model.

128GB capacity with MLC endurance

The 128GB capacity holds an operating system, core applications and a modest working set of files. Sustained sequential reads reach 540MBps and writes reach 520MBps, while 4KB random performance reaches 97,000 IOPS read and 90,000 IOPS write. Heavy media libraries or large game collections will exceed the available space.

How it compares

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

Price $126.99
Cheaper than about 64% of the 1,994 comparable items (median $180.49).
Total capacity 128 GB
Lower than about 95% of the 1,368 comparable items (median 1 TB).
Price per TB $992.11 per TB
Pricier than about 90% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameSAMSUNG
Product line840 Pro Series
Model nameMZ-7PD128BW
Total capacity128 GB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sustained sequential read rate540 MB/s
Sustained sequential write rate520 MB/s
Random read (4K)Up to 97,000 IOPS
Random write (4K)Up to 90,000 IOPS
Storage
NAND flash typeMLC
Controller chipSamsung MDX Controller
Ports & slots
Interface typeSATA III
Power
Idle power draw0.054 W
Active power draw0.069 W
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Shipping weight0.11 kg
Package size145 × 142 × 20 mm
More details
Mean time between failures1,500,000 h

Other versions of this model

1 more in the same range

Questions about this item

Will the 540MBps sequential read speed be reached in a typical laptop?

The 540MBps figure is the drive's sustained sequential read rating over SATA III; actual throughput depends on the host controller, cable quality and workload, but the drive is designed to saturate the 6Gbps link under sequential loads.

Does the SATA III interface limit the 97,000 IOPS random read performance?

SATA III caps at 6Gbps, so the 97,000 IOPS rating is measured within that bandwidth ceiling; the drive reaches this level for 4KB random reads when the system queue depth and driver support allow it.

Will the 7.00mm height fit a standard 2.5-inch bay?

Yes, the 7.00mm z-height matches the common 2.5-inch form factor used in most laptops and drive cages; no spacer or adapter is required for a standard SATA bay.

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