Kioxia optical-based PCIe 5.0 SSDs support cable lengths up to 40 meters — now they just need optical-ready data centers

multicore optical fibers
(Image credit: Shutterstock)

Consumer and enterprise SSD manufacturer Kioxia has confirmed it has completed development of its next-generation PCIe 5.0 SSDs utilizing optical technology. In a news post, Kioxia claims AIOcore, Kyocera, and itself are working to improve compatibility of its new optical SSDs with (server) platforms that take advantage of generative AI and other highly-intensive data crunching workloads.

The new drive's development consisted of a prototype PCIe 4.0 Kioxia SSD featuring IOCore's Optinity optical and electrical integrated module. The optical system was allegedly tested and confirmed to work at PCIe Gen 5 speeds, enabling the "PCIe 4.0" prototype drive to operate at 5.0 speeds.

Aaron Klotz
Contributing Writer

Aaron Klotz is a contributing writer for Tom’s Hardware, covering news related to computer hardware such as CPUs, and graphics cards.

  • Rob1C
    The English version of the first link in the article is more helpful to more people than the Japanese language version: https://www.kioxia.com/en-jp/business/news/2025/20250408-1.html
    Reply
  • bit_user
    Tunneling PCIe over fiber is an interim step, at best. Once the industry gets serious about optical, I think they'll drop PCIe/CXL signalling and adopt a protocol better suited to the job. Maybe still use CXL-compatible semantics, but not the signalling.
    Reply
  • jp7189
    I'm not sure i see the point of optical direct to the drive. I would expect optical PCIe links to a chassis with a backplane that breaks out to commodity drives.
    Reply
  • Amdlova
    jp7189 said:
    I'm not sure i see the point of optical direct to the drive. I would expect optical PCIe links to a chassis with a backplane that breaks out to commodity drives.
    POWER! save tons of it
    Reply