Micron says HBM4 36GB 12-high is in volume shipment for NVIDIA Vera Rubin

At NVIDIA GTC on March 16, 2026, Micron said its HBM4 36GB 12-high memory had begun volume shipment in calendar Q1 2026, designed for NVIDIA's Vera Rubin platform. It cited pin speeds above 11 Gb/s and bandwidth above 2.8 TB/s, and said it was sampling a 48GB 16-high HBM4 stack to customers. These are company performance claims, not independently tested figures.

• HBM4 36GB 12-high in volume shipment, started in calendar Q1 2026
• Pin speed above 11 Gb/s and bandwidth above 2.8 TB/s (company claim)
• HBM4 48GB 16-high samples shipping to customers
• Product designed for NVIDIA Vera Rubin