Ever since the creation of A64FX for the Fugaku supercomputer, Fujitsu has been plotting the development of next-generation CPU design for accelerating AI and general-purpose HPC workloads in the data center. Codenamed Monaka, the CPU is the latest creation for TSMC's 2 nm semiconductor manufacturing node. Based on Armv9-A ISA, the CPU will feature up to 150 cores with Scalable Vector Extensions 2 (SVE2), so it can process a wide variety of vector data sets in parallel. Using a 3D chiplet design, the 150 cores will be split into different dies and placed alongside SRAM and I/O controller. The current width of the SVE2 implementation is unknown.

The CPU is designed to support DDR5 memory and PCIe 6.0 connection for attaching storage and other accelerators. To bring cache coherency among application-specific accelerators, CXL 3.0 is present as well. Interestingly, Monaka is planned to arrive in FY2027, which starts in 2026 on January 1st. The CPU will supposedly use air cooling, meaning the design aims for power efficiency. Additionally, it is essential to note that Monaka is not a processor that will power the post-Fugaku supercomputer. The post-Fugaku supercomputer will use post-Monaka design, likely iterating on the design principles that Monaka uses and refining them for the launch of the post-Fugaku supercomputer scheduled for 2030. Below are the slides from Fujitsu's presentation, in Japenese, which highlight the design goals of the CPU.