Okay, here is the abstract and summary for the provided transcript about the Fujitsu Monaka chip.
Abstract:
This video discusses Fujitsu's upcoming processor, Monaka, positioned as a technologically advanced successor lineage, though targeting a different market than the previous A64FX chip used in the Fugaku supercomputer. Revealed partially at Mobile World Congress 2025, Monaka is notable for its planned use of 2nm process technology for its compute dies, which are stacked on 5nm SRAM dies using Through-Silicon Vias (TSVs). Each chip will feature 144 ARM V9 cores (supporting SVE2), with systems designed for two sockets (288 cores per node). Key features include 12 channels of DDR5 memory, PCIe Gen 6, custom ultra-low voltage operation for high efficiency, and "mainframe class" reliability features. The video highlights Fujitsu's chiplet strategy, likely driven by 2nm costs, and speculates on potential manufacturing by Japan's Rapidus foundry. A significant aspect is the announced partnership with AMD to port the ROCm software stack (for AI and HPC) to the Monaka platform, leveraging existing software ecosystems.
Fujitsu's Monaka: A Glimpse into the Next Generation 2nm ARM Processor
[0:00:01] Introduction & A64FX Recap: Introduces Fujitsu's history of unique chip designs, highlighting the previous A64FX processor (custom ARM SVE core for HPC, used in the #1 supercomputer Fugaku).
[0:01:05] Introducing Monaka: Fujitsu's next major chip, Monaka, is revealed, noted for being the first announced chip targeting 2nm process technology. Initial specs mentioned include ~288 cores, ARM V9, and stacked SRAM.
[0:02:12] Mobile World Congress 2025 Update: New details and validation of rumors emerged at MWC 2025, where a physical package (potentially a mockup) of Monaka was displayed.
[0:02:51] Monaka Core Specifications: Confirmed specs include 144 cores per chip (for 288 cores per 2-socket node), 12 DDR5 channels, PCIe Gen 6 support, ARM V9 architecture with SVE2 (Scalable Vector Extensions 2), and confidential computing features.
[0:03:15] Advanced Chiplet Design: Monaka utilizes a chiplet approach with 2nm compute dies stacked directly on 5nm SRAM dies (using Through-Silicon Vias), connected via a silicon interposer to a central 5nm I/O die.
[0:03:53] Performance, Efficiency & Reliability Goals: Fujitsu targets 2x performance and efficiency gains, emphasizing ease of use via strong compiler technology and aiming for "mainframe class" reliability (high RAS - Reliability, Availability, Serviceability).
[0:04:43] Package Layout Examination: A close-up of the (likely mockup) package shows four compute chiplets surrounding a central I/O die, with four smaller stiffener dies at the corners.
[0:05:11] Potential 2nm Manufacturing Source: Speculation arises that the new Japanese foundry, Rapidus, which is building a 2nm fab and partnering with research institutions, could be the manufacturing partner for Monaka's 2nm components.
[0:05:52] AMD Partnership for Software Ecosystem: Fujitsu is partnering with AMD to leverage their software expertise, specifically porting the ROCm AI and HPC software stack to run effectively on the Monaka ARM processor, avoiding redundant development.
[0:07:00] Monaka vs. A64FX Comparison: Monaka differs from A64FX by using DDR5 instead of HBM, featuring 144 cores/chip vs. 48, using 2nm/5nm vs. 7nm, and being air-cooled only, suggesting a focus on broader scale-out deployments rather than just peak HPC.
[0:07:46] Custom Ultra-Low Voltage Operation: Fujitsu is employing custom-designed circuits and SRAM cells using proprietary tools to achieve stable operation at extremely low voltages, potentially beyond standard foundry PDKs (Process Design Kits), enhancing efficiency.
[0:08:32] Evolution of Fujitsu Processors: A historical overview shows how Fujitsu's mainframe and SPARC processor lines eventually converged into the A64FX, with Monaka representing the next step in this unified lineage.
[0:09:14] Market Position & Cost Factors: While AI is a focus, HPC remains crucial for Monaka. The move to chiplets is partly necessitated by the high cost associated with manufacturing on the 2nm node.
[0:10:02] Conclusion and Future Hopes: The presenter hopes for more technical disclosures at conferences like Hot Chips and invites engagement from the Fujitsu team or viewers with more information about this unique processor design.