At the annual Hot Chips conference, IBM announced what it describes as the first dual-architecture mainframe processor, designed to let enterprises run operating systems and applications on both IBM's own architecture and Arm's compute platform within future IBM Z and LinuxONE systems. This marks the first processor to emerge from IBM and Arm's collaboration, first established in April 2026, and represents a significant step forward in enterprise computing. The new processor is being developed to let organizations run Arm-native Linux environments simultaneously alongside z/OS and Linux on IBM Z, while still benefiting from IBM's established strengths in security, reliability, and scale.
With more than 22 million developers worldwide, Arm's software ecosystem already supports a broad and growing range of applications spanning cloud to edge computing, including much of the cloud-native and AI software increasingly shaping modern infrastructure. This new processor is meant to bring that ecosystem to IBM's platforms, which are widely known for transaction processing and data-intensive workloads. In turn, Arm-based workloads running on this processor would benefit from IBM's enterprise-grade capabilities, including improved reliability, hardware-level fault detection and recovery, advanced encryption, secure key management, and AI acceleration.
Built on a 2-nanometer manufacturing process, the processor's design includes 11 high-performance cores running at more than 5.7 GHz, AI inference accelerators aimed at detecting fraud during transactions in real time, a dedicated on-chip data processing unit to speed up input/output operations, and a large cache architecture built to support demanding enterprise workloads. Notably, the chip isn't built with separate Arm and IBM cores sitting side by side; instead, each individual processor core can natively execute either Arm and IBM Z instructions, or Arm and LinuxONE instructions, at the same time, while still prioritizing the performance, security, encryption, and availability characteristics each platform is known for. IBM Z and LinuxONE systems are capable of scaling to hundreds of cores and tens of terabytes of memory.
Christian Jacobi, chief technology officer and IBM Fellow within IBM Systems Development, said that as organizations modernize their application portfolios and integrate AI into core business operations, they need infrastructure that expands their options rather than limiting them. He described the new processor as a significant architectural advancement for IBM Z and LinuxONE, saying that by bringing Arm natively onto the platform, IBM is combining access to one of the industry's fastest-growing software ecosystems with the qualities that have made IBM systems the foundation many businesses run on today.
Mohamed Awad, executive vice president of Cloud AI at Arm, said that as AI continues to scale, more of the broader computing landscape is converging around Arm. He noted that IBM Z and LinuxONE already power some of the world's most demanding workloads in highly regulated industries, and that bringing Arm compute and its software ecosystem to these platforms extends that momentum into mission-critical enterprise infrastructure, giving organizations greater choice in how they deploy AI.
IBM frames this milestone as a major step forward in its shared vision with Arm of expanding application choice and access to the latest software innovation for enterprise computing, without compromising the capabilities these environments require.
