GoKawiilIBM debuts mainframe chip whose cores natively run both Arm and Z instructions
IBM unveiled a new mainframe processor at Hot Chips that will power future IBM Z and LinuxONE systems, marking the first chip whose cores can execute both IBM's proprietary instruction set and Arm's, switching between them in nanoseconds. Each of the chip's 11 cores is built to be dual-architecture rather than pairing separate Arm and Z cores side by side, letting Arm-native Linux and AI software run alongside traditional z/OS transaction workloads on the same silicon.
GoKawiil's interpretation of the reporting above, not reported fact.
Mainframes remain the backbone of global banking, insurance and government transaction processing, but they have largely sat outside the Arm-dominated software and AI ecosystem. By fusing both instruction sets into one core, IBM aims to let enterprises modernize with Arm-based AI tools without abandoning decades of mission-critical z/OS infrastructure, potentially reshaping how legacy systems adopt AI.
- IBM's new chip is the first mainframe processor with cores that natively run both Arm and Z instruction sets.
- It stems from IBM and Arm's April partnership and will power next-gen IBM Z and LinuxONE systems.
- The design lets AI and Arm-native Linux workloads run alongside core banking and transaction systems on the same hardware.
Source: venturebeat.com, 2026-08-24
Published there as: “IBM’s next-gen mainframe chip is the first to run Arm and Z workloads on the same cores”
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