Fujitsu shows 144-core MONAKA CPU sample

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💡144-core 3.5D CPU sample for HPC – key for AI infra builders

⚡ 30-Second TL;DR

What Changed

144 cores in new MONAKA CPU architecture

Why It Matters

Advances high-core density CPUs for AI/HPC workloads, potentially lowering costs for scalable data centers. Fujitsu's progress signals competition in AI infrastructure hardware.

What To Do Next

Benchmark MONAKA samples against ARM-based HPC alternatives for your data center upgrades.

Who should care:Enterprise & Security Teams

🧠 Deep Insight

Web-grounded analysis with 6 cited sources.

🔑 Enhanced Key Takeaways

•Monaka uses four 36-core compute chiplets on TSMC's 2nm process stacked face-to-face via hybrid copper bonding on 5nm SRAM tiles.[1][2]
•Features a central I/O die with 12-channel DDR5 memory controller, PCIe 6.0 with CXL 3.0 support, and no HBM integration.[1][3]
•Developed in collaboration with Broadcom using 3.5D XDSiP platform, targeting air-cooling for doubled energy efficiency by 2026-2027.[2]
•Armv9-A with SVE2 for AI/HPC and Confidential Computing; supports up to 6TB DDR5 RDIMM per node in dual-socket configs.[3][4]

📊 Competitor Analysis▸ Show

Feature	Fujitsu Monaka (144-core)	AMD EPYC (e.g., Genoa-X)	Intel Xeon (e.g., Emerald Rapids)
Cores per Socket	144 Armv9	Up to 192 Zen4	Up to 64 Sapphire Rapids
Process Node	2nm cores + 5nm SRAM/IO	5nm/4nm	Intel 7 (≈5nm)
Packaging	3D chiplet CoWoS/XDSiP, air-cooling	2.5D/3D V-Cache	2.5D EMIB
Memory	12-ch DDR5, up to 6TB/node	12-ch DDR5	8-ch DDR5
Efficiency Goal	Double competitors by 2026-2027	High perf/watt	Optimized for enterprise

🛠️ Technical Deep Dive

•Architecture: Armv9-A with SVE2 (256-bit) for AI/HPC acceleration and Confidential Computing for security.[3][4]
•Chiplet Design: 4x 36-core compute dies (TSMC N2) stacked F2F on SRAM dies (TSMC N5) using hybrid copper bonding (HCB); central I/O die handles interfaces.[1][2][5]
•Memory: 12-channel DDR5 RDIMM controller supporting up to 6TB per dual-socket node (21GB/core), bandwidth ~460-1228 GB/s with future MCRDIMMs.[1][3]
•I/O: PCIe 6.0 x16 (CXL 3.0) low-profile slots (2-5 per node), OCP 3.0 NIC, InfiniBand/Ethernet interconnects; supports 2 full-size GPGPUs.[3]
•Power/Cooling: Ultra-low voltage operation with air-cooling capability; 2nm cores <30% of total die area for cost efficiency.[4]
•Dual-socket: 288 cores/node, 24 DIMM slots, 2U chassis with water-cooling option for CPU.[3]

🔮 Future ImplicationsAI analysis grounded in cited sources

Monaka enables air-cooled 288-core Arm nodes with 6TB DDR5 at lower cost than HBM-based rivals.

3D stacking limits 2nm to cores only while using cost-effective 5nm for SRAM/IO and mainstream DDR5 avoids HBM shortages and high costs.[1][4]

Fujitsu targets 2x energy efficiency over x86 competitors by 2026-2027 via ultra-low voltage Armv9.

Monaka's design emphasizes low power with air cooling, SVE2 optimizations, and advanced nodes to outperform AMD EPYC and Intel Xeon in datacenter efficiency.[2][4]