Arm Izanagi XPU 1 specs: TSMC N2, 5.5x reticle, HBM4, taped out Q4'25
zephyr_z9 · x · 2026-09-24
Ian Cutress detailed the XPU 1, aka Arm Izanagi: TSMC N2 on N3, 5.5x reticle, 120mm x 125mm package, two 3D F2F stacks, full-reticle base die, 4x IO chiplets at 200G Serdes, HBM4. Tapeout completed Q4'25, validation due Q3'26.
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