SK Hynix and Sandisk Release First HBF Standard Spec with 3TB/s Bandwidth

First High Bandwidth Flash standard published via OCP, targeting AI inference storage gaps. Google and Tenstorrent join alliance; SK Hynix unveils V10 NAND.

Woofun AI reports that SK Hynix and Sandisk jointly released the inaugural High Bandwidth Flash (HBF) standard specification at the FMS 2026 conference, approximately six months after forming their alliance in February this year. The specification, accessible through OCP, defines capacity up to 512GB, bandwidth levels reaching approximately 3.0TB/s, and UCIe interconnect usage. Google and Tenstorrent have confirmed membership in the HBF alliance.

SK Hynix positioned HBF as a storage tier bridging HBM and SSD, combining high-speed transmission with NAND capacity. The company debuted 10th generation (V10) 375-layer 4D NAND wafers, citing 2.5x energy efficiency gains over the prior generation, with mass production slated for early next year. Executives advocated for a "Tiered Memory" architecture to address AI inference data processing challenges.