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SanDisk® X400 SSD

SanDisk® X400 SSD

SanDisk' leading SATA drive for notebooks, desktops and boot-drive applications, the X400 SSD delivers new levels of reliability, responsiveness and endurance. It is also the world’s first single-sided M.2 1 TB drive.

The SanDisk X400 SSD is built with sixth-generation SanDisk® TLC flash, which offers quick responsiveness, high reliability and low power for a seamless experience for thin and ultramobile notebooks. It’s the ideal storage solution for heavy workloads such as photo and video editing, multitasking or office productivity.


Manufacturer: SanDisk

The SanDisk® X400 SSD is the upper-tier SATA client SSD, driving mainstream adoption in computing platforms for both corporate customers and endconsumers. It is designed with nCache™ 2.0 technology to provide greater reliability and high-grade endurance for longevity and is backed by a five-year warranty

Thin is in
With a 1.5mm single-sided form factor (M.2 2280 module), the X400 SSD is the first single-sided 1TB SSD in the industry, giving it the performance and capacities ideal for ultrathin designs. The X400 SSD is also available in 2.5” 7mm-height to be a true drop in replacement for mechanical HDDs.

nCache2.0 and DataGuard: Advanced Technologies for A Better Experience
SanDisk technologies combine nCache 2.0, DataGuard and LDPC error correction into the X400 SSD for a superior experience and endurance levels up to 320 TBW (terabytes written), our highest ever for a client drive. SanDisk nCache 2.0 is a set of advanced algorithms that analyze workloads to improve fast burst performance and sustained sequential write speeds while minimizing energy consumption and controller overhead. The X400 SSD is backed by a 5-year warranty.

Designed With Security in Mind
The self-encrypting drive (SED) version of the X400 SSD enables users to protect sensitive documents quickly and easily, safeguarding data from theft or disclosure. X400 SED SSD also supports TCG Opal 2.0 for interoperability with a wide spectrum of security software platforms. Please check with your SanDisk representative for ordering details and specific SKU numbers for the SED version of the X400 SSD


  • 128GB- 1TB
  • SATA III 6Gb/s Interface
  • 2.5" 7mm, M.2 2280 Form Factor
  • Sequential (R/W) Up to 545/520MB/s
  • Random (R/W) Up to 95k IOPS


  • Capacities**: 128GB, 256GB, 512GB, 1TB
  • Interface: SATA III (6 Gb/s) backward compatible to SATA II and I
  • Endurance (TBW)**: 72 (128GB), 80 (256GB), 160 (512GB), 320 (1TB)
  • Active Power (mW):70
  • Slumber(mW): 42-45 (128GB, 256GB), 42-46 (512GB), 45-52 (1TB)
  • DEVSLP(mW): 4.9-6.0 (128GB, 256GB), 6.0-7.7 (512GB), 6.0-9.7 (1TB)
  • Weight(g):
    • 2.5”/7mm cased: 7.00mm x 69.85mm x 100.5mm @37.4g, 59.7g(1TB)
    • M.2 2280: 1.5mm x 22.00mm x 80.0mm @ 7 ± 1g
  • Operating Temperature: 32ºF to 158ºF (0°C to 70°C)
  • Non-operating Temperatures: -67ºF to 185ºF (-55°C to 85°C)
  • Operating Vibration: 5 gRMS, 10 – 2000 Hz, 3 axes
  • Non-operating Vibration: 4.9 gRMS, 7 – 800 Hz, 3 axes
  • Operating/Non-operating Shock: 1,500 G @0.5 msec half sine
  • Certifications: FCC, UL, TUV, KC, BSMI, VCCI

Performance is based on the CrystalDiskMark benchmark using a 4000MB LBA range, on Gigabyte GA-Z77X-UD5H desktop with Intel Z77 chipset, Intel i7-3770 3.4GHz, 8M, Ivy Bridge, Windows 8 64-bit SP1 using Intel iRST version, secondary drive, C-state on.


5 Years

Part Numbers

Ordering Information (for all regions)


X400 SKU Form Factor Capacity

SD8SN8U- 128G/256G/512G/1T00

SD8SN8U-128G, SD8SN8U-256G, SD8SN8U-512G, SD8SN8U-1T00

M.2 2280 128GB-1TB

SD8SB8U- 128G/256G/512G/1T00

SD8SB8U-128G, SD8SB8U-256G, SD8SB8U-512G, SD8SB8U-010T

SATA 2.5" 7mm 128GB-1TB
SD8SN8U- 128G-1122/256G-1122/512G-1122/1T00-1122 M.2 2280 128GB-1TB
SD8SB8U- 128G-1122/256G-1122/512G-1122/1T00-1122 SATA 2.5" 7mm 128GB-1TB
SD8TB8U- 128G-1122/256G-1122/512G-1122/1T00-1122 SATA 2.5" 7mm SED 128GB-1TB

11GB = 1 billion bytes. IDEMA compliant
21TB capacities are supported in SATA: 2.5" form factor only
3M.2 2280 Single Sided height of S2 is supported for capacities of up to 256GB. 512GB supports S3 height
4Up to stated speed. Based on internal testing ; Based on CDM 1GB range ; performance may vary based on host device. Measured on 256GB capacity
5Up to stated speed. Based on internal testing ; Based on CDM 1GB range ; performance may vary based on host device. Measured on 512GB capacity

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