IBM Unveils First Dual-Architecture Mainframe Processor With Native Arm Support

IBM announced the first dual-architecture mainframe processor at the Hot Chips conference on Tuesday, designed to let enterprises run operating systems and applications on both IBM and Arm compute platforms in future IBM Z and LinuxONE systems, the company said. The announcement marks the first processor milestone to emerge from IBM's collaboration with Arm, established in April 2026.

According to IBM, the new processor is being developed to allow organizations to run Arm-native Linux environments simultaneously with z/OS and Linux on IBM Z, while retaining IBM's established security, reliability and scale. The company said the Arm software ecosystem, which supports more than 22 million developers worldwide, spans a broad range of applications from cloud to edge, including the cloud-native and AI software increasingly shaping modern infrastructure. Bringing that ecosystem to IBM's platforms will let Arm workloads benefit from IBM's enterprise-grade capabilities, according to the company, including hardware-level fault detection and recovery, advanced encryption, secure key management and AI acceleration.

The processor is built on a 2-nanometer technology node and will contain 11 high-performance cores operating at more than 5.7 GHz, according to IBM, along with AI inference accelerators for in-transaction fraud detection, a dedicated on-chip data processing unit for I/O acceleration, and a large cache architecture for demanding enterprise workloads.

 

IBM said the chip is architected without separate Arm and IBM cores: each processor core can natively execute Arm and IBM Z, or Arm and LinuxONE, instructions concurrently, while prioritizing the platform's established performance, security, encryption and availability characteristics. IBM Z and LinuxONE platforms are capable of scaling to hundreds of cores and tens of terabytes of memory, the company said.

Christian Jacobi, chief technology officer and IBM Fellow for IBM Systems Development, said the processor addresses a growing need for infrastructure flexibility. "As organizations modernize their application portfolios and integrate AI into core business operations, they need infrastructure that expands their options," he said. "This processor represents a significant architectural advancement for IBM Z and LinuxONE. By bringing Arm natively to our platform, we're combining access to one of the industry's fastest-growing software ecosystems with the qualities that have made IBM systems the foundation for how businesses run today."

Mohamed Awad, executive vice president of cloud AI at Arm, said the partnership extends Arm's growing footprint into mission-critical enterprise infrastructure. "As AI scales, more of the computing landscape is converging on Arm," he said. "IBM Z and LinuxONE power some of the world's most demanding workloads in highly regulated industries. Bringing Arm compute and its software ecosystem to these platforms will extend that momentum into mission-critical enterprise infrastructure to give organizations greater choice in how they deploy AI."