History of HBM: How HBM4 and HBM4E Will Change AI Servers

HBM4 memory stacks beside an AI accelerator on a silicon interposer for next-generation AI servers

This article reviews the evolution from HBM1 to HBM3E and analyzes how HBM4 and HBM4E will reshape AI server platforms through a 2,048-bit interface, 32 independent channels, base dies, TSVs and interposers, and 12-high and 16-high stacking.