Azure Cobalt 100: the one hundred twenty eight core ARM that Microsoft puts to work

Published on May 18, 2026 | Translated from Spanish

Microsoft has unveiled its Cobalt 100 CPU, a 128-core processor based on the ARM Neoverse N2 architecture. Designed specifically for its data centers, it aims to deliver solid performance with contained energy consumption. It is not the most powerful on the market, but it is a key piece in the company's cloud strategy, competing directly with other ARM-based solutions.

Azure Cobalt 100 processor being inserted into a server motherboard by a robotic arm, 128 glowing core units visible under a microscope-style cross-section, ARM Neoverse N2 architecture diagram floating above as holographic blueprint, cold blue LED lighting inside a Microsoft datacenter, thermal paste application process during installation, photorealistic engineering visualization, metallic heatsink with precision fins, data flow lines connecting to cloud storage racks, dramatic low-angle industrial lighting, ultra-detailed silicon wafer texture, cinematic technical illustration

An ARM design optimized for cloud workloads 🚀

The Cobalt 100 uses ARM's Neoverse N2 cores, an architecture designed for servers that balances per-thread performance and efficiency. Microsoft has added its own optimizations in the silicon, focused on reducing latency in virtualization operations and improving memory bandwidth. With 128 cores, it is aimed at parallel tasks such as containers, distributed databases, and microservices, where process density matters more than raw single-core speed.

128 cores so your website loads just a little bit faster ☕

Microsoft promises high efficiency, which in real-world terms means your cloud bill will drop a few cents while the Cobalt 100 works hard to process your cat photos. With 128 cores, it can surely run 127 instances of Minecraft and one of Excel without breaking a sweat. That said, don't expect it to magically speed up the office coffee; for that, better stick with the usual machine.