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Green rectangular M.2 2280 circuit board with gold edge connector and black controller chips

SanDisk

SanDisk SD8SN8U-256G-1122 X400 256GB M.2 2280 SATA internal SSD

SKU CH-AXZ2-CMCKV MPN SD8SN8U-256G-1122

256GB M.2 2280 SATA internal SSD for enterprise workloads with up to 540MB/s read, 520MB/s write and 1.75M hours MTTF

  • Device TypeInternal Solid State Drive (SSD)
  • Used ForEnterprise
  • Form FactorM.2 2280
  • Capacity256GB
  • Memory ComponentsTLC
  • InterfaceSATA III

Options 256GB M.2

  • Up to 540 MB/s sequential read for fast boot and load times
  • Up to 520 MB/s sequential write to move large files quickly
  • 93,500 IOPS random read speeds up application responsiveness
  • 75 million hours MTTF supports long-term reliability in enterprise use
  • M.2 2280 form factor fits slim laptops and compact desktops

X400 SATA M.2 2280 256GB

The SanDisk X400 is a 256GB internal solid-state drive built in the single-sided M.2 2280 form factor. It connects through a SATA III interface and uses TLC memory components. The drive is designed for enterprise workloads and operates between 0°C and 70°C.

Enterprise upgrade or SATA-only slot

This SSD suits systems that need a 256GB enterprise-class drive in an M.2 2280 package and have a SATA-based M.2 slot. It is not appropriate for platforms that require a PCIe-attached drive or for users seeking higher capacities than 256GB.

SATA III interface decides compatibility

The single specification that determines fit is the SATA III interface; the drive will only function in M.2 slots wired for SATA signalling. Verify the host slot supports SATA before purchase.

Highlights

  • Up to 540 MB/s sequential read for fast boot and load times
  • Up to 520 MB/s sequential write to move large files quickly
  • 93,500 IOPS random read speeds up application responsiveness
  • 75 million hours MTTF supports long-term reliability in enterprise use
  • M.2 2280 form factor fits slim laptops and compact desktops

Specifications

BrandSanDisk
SeriesX400
ModelSD8SN8U-256G-1122
Part NumberSSD - 256GB, 2280, M.2, SATA, X400
Device TypeInternal Solid State Drive (SSD)
Used ForEnterprise
Form FactorM.2 2280
Capacity256GB
Memory ComponentsTLC
InterfaceSATA III
Max Sequential ReadUp to 540 MBps
Max Sequential WriteUp to 520 MBps
4KB Random ReadUp to 93,500 IOPS
4KB Random WriteUp to 60,000 IOPS
MTTFUp to 1.75M hours
FeaturesUp to 1TB in A Single-sided M.2 2280 and 2.5" 7mm Form Factors
Ncache 2.0 Maximizes Read/write Operations and Improves Responsiveness
Greater Reliability With Dataguard Client and The New Ldpc Error Correction Mechanism
Available In 128GB, 256GB, 512GB, and 1TB Capacities in Both 2.5" 7mm and M.2 2280 Form Factor
Better Slumber Mode For Greater Low Power Efficiency
TCG Opal 2.0 Support
Operating Temperature0°C ~ +70°C
Storage Temperature-55°C ~ +85°C
Max Shock Resistance1500G
Max Vibration ResistanceOperating: 5.0 gRMS, 10 - 2000 Hz
Non-operating: 4.9 gRMS, 7 - 800 Hz
Height1.50mm
Width22.00mm
Depth80.0mm
Weight7.00g
Package ContentSOLID STATE DRIVE ONLY
Shipping weight0.05 kg
Package size102 × 71 × 8 mm

Other versions of this model

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

Questions about this item

Will this M.2 2280 drive fit in a laptop that only supports SATA M.2 SSDs?

Yes, the drive uses the SATA interface and the M.2 2280 form factor, so it fits slots wired for SATA M.2 devices.

What do the sequential speeds of 540 MBps read and 520 MBps write mean for daily use?

Those speeds are the practical ceiling of the SATA interface, giving fast boot times and quick loading of large files.

Is the 256 GB capacity enough for an operating system plus core applications?

256 GB comfortably holds Windows or Linux with everyday programs, leaving space for active project files.

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