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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

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

Options 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.

Highlights

  • 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

Specifications

BrandCrucial
SeriesM4
ModelCT256M4SSD2
Device TypeInternal Solid State Drive (SSD)
Used ForConsumer
Form Factor2.5"
Capacity256GB
Memory ComponentsMLC
InterfaceSATA III
ControllerMarvell
Sustained Sequential ReadUp to 500MBps (SATA 6Gbs); 265MBps (SATA 3Gbs)
Sustained Sequential WriteUp to 260MBps (SATA 6Gbps)
4KB Random ReadUp to 45,000 IOPS
4KB Random WriteUp to 50,000 IOPS
MTBF1,200,000 hours
FeaturesIntegrated 8-channel single chip Controller
Self-monitoring, analysis, and reporting technology (SMART) command set
RAID Support
Average Access Time < 0.1 ms
Data Reliability: Built-in EDC/ECC
Power Consumption (Idle)< 85 mW
Power Consumption (Active)0.16W
Operating Temperature0°C ~ +70°C
Storage Temperature-40°C ~ +85°C
Max Shock Resistance1500G
Height9.5mm
Width69.85mm
Depth100.5mm
Weight75g
Shipping weight0.11 kg
Package size130 × 130 × 42 mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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