IBM Unveils Dual-Architecture Mainframe Chip Running Z and Arm Natively

IBM $IBM reveals a dual-architecture mainframe processor natively executing both Z and Arm $ARM instructions. Built on a 2-nanometer process node, the chip features 11 high-performance cores operating above 5.7 GHz. Each core dynamically switches between instruction sets in nanoseconds, solving a compatibility problem banks were previously stuck with. This integration instantly taps into an existing developer base of over 22 million people. "We're really not addressing their need if we just have a few, I'd say, loosely Arm cores in the corner of the chip." — Christian Jacobi It's an expensive but necessary engineering flex to keep banks tied to bare metal, since the modern AI stack refuses to run natively on legacy architectures.