Next-Generation CPU Design for AI and HPC Workloads

Fujitsu has been planning the development of a new CPU design called Monaka, following the creation of A64FX for the Fugaku supercomputer. Monaka is designed for accelerating AI and general-purpose HPC workloads in data centers. It will be manufactured using TSMC's 2 nm semiconductor manufacturing node and will be based on Armv9-A ISA. The CPU will feature up to 150 cores with Scalable Vector Extensions 2 (SVE2), allowing it to process various vector data sets simultaneously. The specific width of the SVE2 implementation is currently unknown.

The CPU will support DDR5 memory and PCIe 6.0 connection for storage and other accelerators. It will also incorporate CXL 3.0 to ensure cache coherency among application-specific accelerators. Monaka is expected to be available in FY2027, starting on January 1, 2026. The design aims for power efficiency and will utilize air cooling. It is important to note that Monaka will not power the post-Fugaku supercomputer. Instead, a post-Monaka design will be used for the launch of the post-Fugaku supercomputer in 2030, building upon the principles of Monaka and refining them.

Below are the slides from Fujitsu's presentation, highlighting the design goals of the CPU: