As CES gets underway, SanDisk is announcing the X400 SSD as the successor to the X300 and X300s and as the higher-performance counterpart to the Z400s. The new X400 will be the flagship of SanDisk's line of SATA and M.2 SATA SSDs for OEMs, though by the standards of consumer SSDs sold at retail it wouldn't quite be a high-end SATA drive.

The X300s was the Self-Encrypting Drive variant of the X300, but for the X400 SanDisk is unifying the two by making encryption a standard feature, pending a firmware update due in April to provide full TCG Opal support. The X400 improves performance in most areas, though not by any huge margins. They're dropping the smallest capacities, leaving 128GB as the starting point, and mSATA is no longer an option. Both changes reflect a lack demand for outdated drive configurations in new product designs. Like the X300, the X400 uses TLC NAND flash and relies on SLC-mode write caching to provide competitive write speeds.

SanDisk OEM Client SSD Comparison
Drive X400 Z400s X300
Capacities 128GB, 256GB, 512GB, 1TB 32GB, 64GB, 128GB, 256GB 64GB, 128GB, 256GB, 512GB, 1TB (2.5" only)
Sequential Read 545 MB/s 546 MB/s 530 MB/s
Sequential Write 520 MB/s 342 MB/s 470 MB/s
Random Read IOPS 95k 37k 98k
Random Write IOPS 75k 69k 70k
Form Factors 2.5", M.2 2280 2.5", mSATA, M.2 2242, M.2 2280 2.5", mSATA, M.2 2280
Warranty 5 years 5 years 3 years

The X400 adds a 1TB M.2 option that SanDisk claims is the first single-sided 1TB M.2 drive. The X400 also adds LDPC ECC to the mix, which probably helped SanDisk increase the warranty period to 5 years.

The SanDisk X400 was sampling to OEMs as of late last year and is now available to OEMs and system integrators in volume.

Source: SanDisk



View All Comments

  • npz - Tuesday, January 5, 2016 - link

    I wonder if that X400 1TB M.2 is the one used by the Vaio Canvas Z, Surface Pro 4, and upcoming Lenovos since I was wondering where are they getting their 1TB drives from. Reply
  • abhaxus - Tuesday, January 5, 2016 - link

    I may be mistaken but I think the SP4 is a PCIe SSD. Reply
  • npz - Tuesday, January 5, 2016 - link

    Yes I noticed they mentioned pcie ssd, but I assumed it was through an m.2 connector. Reply
  • Samus - Tuesday, January 5, 2016 - link

    All surface NAND, RAM and wireless chipsets are soldered to the mainboard. Nothing is remotely upgradable. Reply
  • AlterBridge86 - Wednesday, January 6, 2016 - link

    Not true, the SSD is a M.2 NVMe SSD, though the rest is soldered. I still wouldn't recommend trying to open up a Surface Pro :)

    Step 8:
  • gduo - Wednesday, January 6, 2016 - link

    Not NVMe, right? Reply
  • Porsche944 - Sunday, August 28, 2016 - link

    I'm very curious. All the specs show that X400 should be slightly superior to X300, but at, the older X300 seems to have outperformed the X400 in write speeds by as much as 50%. Can anyone provide any insight? Reply

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