Kioxia Announces Next-Generation E1.S SSDs for AI and Hyperscale Environments

New KIOXIA NX1 Data Center NVMe SSDs Increase Performance and Support Direct Liquid Cooling

SAN JOSE, Calif.--(BUSINESS WIRE)--KIOXIA America, Inc. today announced the KIOXIA NX1 Series of solid-state drives (SSDs), a new generation of E1.S PCIe^® 5.0 NVMe™ data center SSDs, and Kioxia’s first SSD with direct liquid cooling support. The KIOXIA NX1 Series features Kioxia’s next-generation, in-house developed controller architecture enabling unique capabilities today while providing a foundation for future features. The new drives are engineered to deliver high-performance, power-efficient storage for GPU-enabled servers and hyperscale data center environments.

The KIOXIA NX1 Series is the successor model of the XD series, and leverages PCIe 5.0 performance to help cloud providers and hyperscale operators optimize infrastructure while maintaining operational efficiency. Compared to the previous generation¹, KIOXIA NX1 SSDs deliver up to 38% higher sequential write performance and up to 20% higher random write performance².

As AI infrastructure continues to scale, storage must keep pace with increasingly dense, accelerator-rich server designs. The E1.S form factor helps maximize storage density while supporting advanced thermal management, including cold-plate-compatible direct liquid cooling configurations that enable efficient heat dissipation in high-performance AI server environments.

Key features of the KIOXIA NX1 Series include:

• Available in E1.S 9.5 mm (supports direct liquid cooling and air cooling) and E1.S 15 mm form factor (supports air cooling)
• Capacities ranging from 1.92 TB to 15.36 TB³ with read-intensive endurance (1 DWPD)
• Compliant with PCIe 5.0, NVMe 2.0 and Open Compute Project (OCP) Datacenter NVMe SSD 2.6 specifications, as well as NVMe Flexible Data Placement (FDP) support
• Built with KIOXIA BiCS FLASH™ generation 8 TLC memory technology utilizing CMOS directly Bonded to Array (CBA) architecture
• Optional TCG Opal-compliant Self-Encrypting Drive (SED) security model^{4, 5}

"E1.S form factor SSDs are becoming increasingly important for AI and hyperscale system designs, keeping high-speed flash storage close to the CPU and GPU," said Neville Ichhaporia, senior vice president and general manager of the SSD business unit at KIOXIA America, Inc. "With the KIOXIA NX1 Series, we're delivering the performance, thermal flexibility and storage density customers need to support the next generation of GPU-enabled infrastructure."

The KIOXIA NX1 Series is currently sampling to select hyperscale customers and will be showcased at FMS: the Future of Memory and Storage, taking place August 4 – 6 in Santa Clara, Calif.

For more information, please visit www.kioxia.com, and follow the company on X and LinkedIn^®.

About KIOXIA America, Inc.

KIOXIA America, Inc. is the U.S.-based subsidiary of Kioxia Corporation, a leading worldwide supplier of flash memory and solid-state drives (SSDs). From the invention of flash memory to today’s breakthrough BiCS FLASH™ 3D technology, Kioxia continues to pioneer innovative memory, SSD and software solutions that enrich people's lives and expand society's horizons. The company's innovative 3D flash memory technology, BiCS FLASH, is shaping the future of storage in high-density applications, including advanced smartphones, PCs, automotive systems, data centers and generative AI systems. For more information, please visit Kioxia.com.

© 2026 KIOXIA America, Inc. All rights reserved. Information in this press release, including product pricing and specifications, content of services, and contact information is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable Kioxia product specifications.

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Notes:

1: Compared to KIOXIA XD8 Series SSDs

2: Read and write speed may vary depending on various factors such as host devices, software (drivers, OS etc.), and read/write conditions.

3: Definition of capacity: Kioxia Corporation defines a megabyte (MB) as 1,000,000 bytes, a gigabyte (GB) as 1,000,000,000 bytes and a terabyte (TB) as 1,000,000,000,000 bytes. A computer operating system, however, reports storage capacity using powers of 2 for the definition of 1GB = 2^30 bytes = 1,073,741,824 bytes and 1TB = 2^40 bytes = 1,099,511,627,776 bytes and therefore shows less storage capacity. Available storage capacity (including examples of various media files) will vary based on file size, formatting, settings, software and operating system, and/or pre-installed software applications, or media content. Actual formatted capacity may vary.

4: SED optional model supports TCG Opal SSC except for some features.

5: SED optional model is not available in all countries due to the local regulations.

The NVMe word mark is a registered or unregistered trademark or service mark of NVM Express, Inc. in the United States and other countries.

PCI Express and PCIe are registered trademarks of PCI-SIG.

OCP and OPEN COMPUTE PROJECT marks are owned by and used with the permission of the Open Compute Project Foundation.

LinkedIn is a trademark of LinkedIn Corporation and its affiliates in the United States and/or other countries.

Other company names, product names and service names may be trademarks of third-party companies.