Arm Details 136-Core AGI Server CPU with 2 TB/s Interconnect at Hot Chips 2026

Arm $ARM reveals architecture details for its AGI server CPU featuring 136 cores. The processor links two 70-core compute chiplets built on the TSMC N3P node, holding back four cores for yield management to expose 136 total active cores. Each 50-billion transistor die keeps compute and I/O unified to aggressively reduce memory latency instead of splitting them apart. A custom UCIe fabric connects the twin chiplets at 2 TB/s to handle massive data throughput within a 300W thermal limit. The architecture supports up to 3 TB of DDR5-8800 memory and 96 PCIe 6.0 lanes for intense hardware expansion. Arm is trading away the manufacturing flexibility of separate I/O dies because it's the only way to hit the brutal memory latency targets that agentic AI models ask for.