We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Total capacity256 GB
  • Sequential read speedUp to 540 MB/s
  • Sequential write speedUp to 520 MB/s
  • Interface typeSATA III
  • Form factorM.2 2280
  • Product typeInternal Solid State Drive (SSD)

Model 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.

How it compares

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

Price $59.99
Cheaper than about 87% 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).
Sequential read speed Up to 540 MB/s
Lower than about 83% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $234.34 per TB
Pricier than about 67% of the 1,362 comparable items (median $165.50 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSanDisk
Product lineX400
Model nameSD8SN8U-256G-1122
Part numberSSD - 256 GB, 2280, M.2, SATA, X400
Total capacity256 GB
Product typeInternal Solid State Drive (SSD)
Intended useEnterprise
Performance
Sequential read speedUp to 540 MB/s
Sequential write speedUp to 520 MB/s
Random read (4K)Up to 93,500 IOPS
Random write (4K)Up to 60,000 IOPS
Storage
NAND flash typeTLC
Ports & slots
Interface typeSATA III
Size & build
Form factorM.2 2280
Overall height1.5 mm
Overall width22 mm
Product depth80.0 mm
Product weight7g
Shipping weight0.05 kg
Package size102 × 71 × 8 mm
In the box
Included itemsSOLID STATE DRIVE ONLY
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-55 °C to 85 °C
Max shock tolerance1500G
Vibration toleranceOperating: 5.0 gRMS, 10–2000 Hz
Non-operating: 4.9 gRMS, 7–800 Hz
More details
Mean time to failureUp to 1.75M hours

Other versions of this model

3 more in the same range

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.

More in Internal NVMe & SATA SSDs

Similar items