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Silver rectangular 2.5 inch SATA SSD with label showing Crucial M4 256GB

Crucial

Crucial CT256M4SSD2 M4 256GB 2.5" SATA internal SSD

SKU CH-RS41-W40NQ MPN CT256M4SSD2

2.5-inch SATA internal SSD with 256GB capacity, MLC memory and sequential reads up to 500MBps

  • Total capacity256 GB
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)
  • Intended useConsumer
  • NAND flash typeMLC

Capacity 256GB

  • 256 GB capacity stores large game libraries and media collections
  • Sustained read speeds up to 500 MB/s load Windows and apps in seconds
  • 45,000 random read IOPS keeps multitasking snappy under heavy workloads
  • MLC NAND with 1.2 million-hour MTBF protects data for years of daily use
  • Low 85 mW idle power extends laptop battery life between charges

Ideal for client computing

This 2.5" SATA internal SSD uses MLC NAND and a Marvell controller to deliver 256GB of storage for notebooks, desktops and workstations. It targets everyday client computing where low power draw and resistance to shock matter. Sequential reads reach 500MBps on a 6Gbps link and 265MBps on a 3Gbps link.

Straightforward 2.5" SATA fit

The drive drops into any standard 2.5" bay and connects with a regular SATA data and power cable. No extra drivers are required because the operating system sees a normal AHCI device. The only common issue is leaving the host controller in IDE mode, which caps throughput at the slower 3Gbps rate.

Steady throughput under load

Sustained sequential write holds at 260MBps while random 4KB performance reaches 45,000 read IOPS and 50,000 write IOPS. Average access time stays below 0.1ms and the controller includes built-in EDC/ECC plus SMART monitoring. Power draw remains at 0.16W active and under 85mW idle across the 0°C to 70°C operating range.

How it compares

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

Price $152.99
Cheaper than about 57% 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).
Price per TB $597.62 per TB
Pricier than about 90% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameCrucial
Product lineM4
Model nameCT256M4SSD2
Total capacity256 GB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sustained sequential read rateUp to 500 MB/s (SATA 6Gbs); 265 MB/s (SATA 3Gbs)
Sustained sequential write rateUp to 260 MB/s (SATA 6 Gbit/s)
Random read (4K)Up to 45,000 IOPS
Random write (4K)Up to 50,000 IOPS
Storage
NAND flash typeMLC
Controller chipMarvell
Ports & slots
Interface typeSATA III
Power
Idle power draw< 85 mW
Active power draw0.16 W
Size & build
Form factor2.5 in (6.35 cm)
Overall height9.5 mm
Overall width69.85 mm
Product depth100.5 mm
Product weight75g
Shipping weight0.11 kg
Package size130 × 130 × 42 mm
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-40 °C to 85 °C
Max shock tolerance1500G
More details
Mean time between failures1,200,000 h

Other versions of this model

1 more in the same range

Questions about this item

How can I confirm the CT256M4SSD2 is delivering its rated 500 MB/s sequential read speed after installation?

Run a SATA 6Gbps benchmark tool such as CrystalDiskMark; a healthy drive on a 6Gbps port should show sustained reads near 500 MB/s and writes near 260 MB/s.

What accessories are included with the CT256M4SSD2 and what must I supply myself?

The drive ships as a bare 2.5" SATA SSD; you must provide a SATA data cable, a SATA power connection and, if your bay is 3.5", a mounting bracket.

Which capacity should I choose if I want the 256 GB model with MLC NAND and a Marvell controller?

The CT256M4SSD2 is the 256 GB variant of the M4 series and already uses MLC flash with the Marvell controller; select this part number for that configuration.

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