# Broadcom ships first samples of Fujitsu's 144-core MONAKA CPU, built with its 3.5D chip-stacking platform

Canonical page: https://technooptimist.io/stories/broadcom-ships-first-samples-of-fujitsu-s-144-core-monaka-cpu-built-468c9ea2
Date: 26 Feb 2026
About: [Fujitsu](https://technooptimist.io/companies/fujitsu.md) · [FUJITSU-MONAKA](https://technooptimist.io/computing/monaka.md)
Original source: https://www.theregister.com/2026/02/27/fujitsu_taps_broadcom/

Broadcom revealed that Fujitsu's MONAKA server CPU is built on its 3.5D XDSiP platform, which bonds chips face to face for very fast die-to-die links, and that samples for Fujitsu shipped that week. MONAKA drops the on-package HBM memory of Fujitsu's earlier A64FX in favour of a large stacked SRAM cache.

## Key facts

- 144 Armv9 cores on four 2nm compute dies of 36 cores each, stacked on four 5nm SRAM dies.
- A central I/O die provides 12 DDR5 channels and PCIe 6.0, linked through a silicon interposer.
- Broadcom says it worked on the stacking technology for almost five years.
- Fujitsu's roadmap then put MONAKA's launch in 2027.

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