Fujitsu has unveiled the first engineering samples of its MONAKA CPU, a groundbreaking 144-core Arm processor built for AI and high-performance computing workloads. The chip, developed in partnership with 1FINITY and using TSMC's 2 nm process, features a 3D chiplet design that combines four 36-core chiplets with SRAM and I/O dies through Broadcom's 3.5D XDSiP packaging. This packaging technology enables face-to-face stacking of components using hybrid copper bonding.

Scheduled for release in 2027, the MONAKA CPU supports 12-channel DDR5 memory, PCIe 6.0 with CXL 3.0, and Arm SVE2 for AI acceleration. Two-socket configurations can scale up to 288 cores per node, making it suitable for data centers handling massive AI inference and simulation workloads. The chip includes HBM memory surrounding the CPU and a large central I/O die, as shown in early sample packaging photos displayed at MWC.

Fujitsu has already achieved a working version of the processor, with Broadcom shipping samples to the company in late February. After initial testing and performance validation, Fujitsu plans to ship these processors to customers by summer, with mass production beginning in 2027. The company positions MONAKA as the successor to its A64FX processor used in the Fugaku supercomputer, which achieved 415.53 PetaFLOPS of FP64 performance and 1.421 ExaFLOPS in HPL-AI benchmarks. Fujitsu expects MONAKA to deliver even greater speeds and efficiency improvements for next-generation AI and data processing applications.