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Silver rectangular 2.5 inch SSD with label showing model and capacity

Crucial

Crucial M4 CT256M4SSD1 256GB 2.5" SATA III internal SSD

SKU CH-TRCK-B70DY MPN CT256M4SSD1

A 2.5-inch 256GB SATA internal SSD with up to 500MBps sequential read, 260MBps write, 45,000 random read IOPS and 50,000 random write IOPS

  • Total capacity256 GB
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product type7 mm Internal Solid State Drive (SSD)
  • Intended useConsumer
  • NAND flash typeMLC
  • Fast boot and load times with up to 500MBps sequential read
  • Snappy multitasking from up to 50,000 IOPS random write
  • Cool, quiet operation at just 0.16W active power
  • Fits thin laptops and standard bays with 7mm 2.5" design
  • Long-term reliability backed by 1,200,000 hours MTBF

256 GB MLC SATA III SSD

The Crucial M4 CT256M4SSD1 is a 2.5 inch internal solid-state drive with 256 GB capacity and a 7 mm height. It uses MLC NAND and a Marvell controller on a SATA III interface. The drive targets consumer notebooks and desktops needing a slim profile without sacrificing storage space.

Sustained sequential performance

On a SATA 6 Gbps link the drive delivers up to 500 MBps sustained sequential read and up to 260 MBps sustained sequential write. On a SATA 3 Gbps link sustained sequential read reaches 265 MBps. Random performance reaches up to 45000 IOPS read and 50000 IOPS write at 4 KB.

SATA III interface limits

The SATA III interface caps theoretical throughput at 6 Gbps, so real-world sustained speeds cannot exceed the bus limit. The drive operates from 0 °C to 70 °C and draws less than 85 mW idle and 0.16 W active. MTBF is rated at 1200000 hours with built-in EDC and ECC for data reliability.

How it compares

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

Price $209.99
Pricier than about 56% 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 $820.27 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 nameCT256M4SSD1
Total capacity256 GB
Product type7 mm Internal 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 height7 mm
Overall width69.85 mm
Product depth100.5 mm
Product weight73g
Shipping weight0.14 kg
Package size130 × 130 × 18 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

Questions about this item

How much power does the 256GB M4 draw when active all day?

Active power is 0.16W; idle power is below 85 mW, so heat and noise stay minimal during continuous use.

What must my laptop or desktop already have to install this 2.5 inch SATA III drive?

A free 2.5 inch drive bay or caddy and a SATA data plus power connector; the drive is 7mm high and fits standard SATA III ports.

Will the M4 work reliably with an older SATA 3Gbps motherboard?

Yes — it runs at SATA 3Gbps with sequential reads up to 265MBps and writes up to 260MBps, and supports the SMART command set for monitoring.

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