SK hynix shows a 16-layer, 48 GB HBM4 stack at CES 2026, with mass production planned for Q3 2026

SK hynix/HBM4

SK hynix unveiled a 16-layer HBM4 stack with 48 GB capacity at CES, the next step from its 12-layer, 36 GB HBM4 which runs at 11.7 Gbps. The company stated the 16-layer part is under development aligned with customers' schedules.

• 16-layer HBM4 holds 48 GB, up from the 12-layer variant's 36 GB.
• Previous generation (12-layer) demonstrated the industry's fastest speed at 11.7 Gbps.
• Development is underway aligned with customer schedules; mass production timeline not specified.
• HBM4 is the sixth generation of high-bandwidth memory for AI accelerators.