There's a new CPU maker.

TL;DR

ARM announced its first physical CPU, the AGI, built for power-efficient AI data center workloads at massive core density.

Key Points

• 1.ARM launched the AGI CPU, its first physical processor. It features up to 136 Neoverse V3 cores, 2MB L2 cache per core, built on TSMC 3nm, running at a fixed 3.6GHz with 12-channel DDR5 delivering 6GB/s per core.
• 2.Fixed clock speed and no SMT are deliberate design choices. Eliminating variable clock speeds ensures consistent power draw, letting data centers plan rack power budgets without peak-load buffers — critical as power is a scarce data center commodity.
• 3.Core density per watt is the headline achievement. A 200kW liquid-cooled OCP rack can fit 45,696 cores and over a petabyte of RAM at only ~half the rack's power budget, with ARM claiming roughly 2x performance-per-watt versus x86.
• 4.The 'AI' branding targets CPU coordinator bottlenecks, not GPU workloads. As AI agents replace humans handling token requests 24/7, head-node CPU demand could quadruple to ~120 million cores per gigawatt, and ARM's efficiency directly addresses that scaling problem.