IBM grows mainframe family with rack, frame models targeting AI, hybrid clouds

IBM is looking to expand the reach of its foundational mainframe portfolio by adding new single frame and rack mounted versions of its Z and LinuxONE systems.

The IBM z17 portfolio adds a single frame and rack mount versions that bring mainframe capabilities into smaller, customizable footprints. The LinuxONE Rockhopper family gets a single frame and rack mount models, plus a new Express rack mount offering, that target new and smaller clients, according to Tina Tarquinio, chief product officer, IBM Z & LinuxONE.

Specifically, the new hardware includes:

• z17 single frame is a fully packaged box in an IBM rack with intelligent power distribution units, delivered as a complete enclosed unit ready to deploy at the edge or other strategically important customer sites.
• z17 rack mount lets customers install IBM Z components directly into their own industry-standard rack, with built-in flexibility for co-location with other technologies.
• LinuxONE Rockhopper 5 is a multi-drawer LinuxONE system for high-density workloads, with on-chip AI acceleration, confidential computing, and postquantum cryptography available in both single frame and rack mount configurations.
• Rockhopper 5 rack mount and Express offerings deliver enterprise-grade Linux, confidential computing, and on-chip AI acceleration in a compact 18U configuration. Designed for organizations supporting a smaller set of workloads, the offering provides a cost-efficient entry point that can scale as business grows, while prioritizing security, resiliency, and performance.

The new IBM z17 and IBM LinuxONE 5 Rockhopper configurations support up to 82 cores and 18 TB of memory across two processor drawers, representing about a 20% increase in core count and 12% increase in memory capacity over current systems, IBM stated. Single processor capacity of an IBM z17 ME2 provides full speed IBM z/OS configurations including 10% greater throughput per core than IBM z16 A02 with some variation based on workload and configuration, according to Tarquinio.

Both systems feature a 5.5 GHz IBM Telum II processor and a built-in AI accelerator that IBM says will let customers run more than 450 billion inferencing operations in a day with one millisecond response time. In addition, the 32-core Spyre AI accelerator is designed to handle all manner of AI workloads.

The idea is to bring the core strengths of IBM Z to a broader range of deployment models while offering the security, resilience, and performance enterprises depend on, Tarquinio said. 

“As always, we’re continuing to innovate to deliver more with less, including up to 20% more capacity than IBM z16 to help process transactions faster and support growing AI-driven workloads,” Tarquinio said.  “Even the newest and smallest member of the IBM z17 family delivers the performance, efficiency, and scalability organizations need as they balance growth ambitions with real-world resource constraints.”

The Linux-based system, Rockhopper 5 is for organizations that have moved past the evaluation question and are ready to consolidate a substantial portion of their x86 estate, said Marcel Mitran, IBM Fellow and CTO of IBM LinuxONE. 

Rockhopper 5 is designed to bring a smaller physical footprint and a software licensing model that reflects actual workload boundaries rather than physical server counts, Mitran said.

The LinuxONE 5 Express is a preconfigured system designed to get organizations running on LinuxONE quickly, with a defined bill of materials and a predictable starting cost, on the same architecture that the largest enterprises in the world depend on, Mitran said.

“It is built for organizations that want to consolidate a modest x86 estate, evaluate LinuxONE for the first time, or deploy a specific workload such as digital assets, AI-infused transaction processing, or confidential computing, without committing to the footprint of the larger model,” Mitran said.

Some of the mainframes’ software features were also bulked up. For example, IBM said that Post Quantum Cryptography security is now standard on the z17 and LinuxONE Rockhopper 5 systems letting customers start to utilize cryptography to protect core resources for the future.

The idea is to help customers protect long-lived, mission-critical data while reducing the cost and complexity of future cryptographic migration, IBM stated. 

In that vein, IBM said it was bringing Crypto Discovery & Inventory, which lets security teams see what has been encrypted across the enterprise. In addition, IBM announced an Infrastructure Management for Z and LinuxONE package that would let customers administer, monitor, automate, and provision IBM Z and LinuxONE systems from a central location.

IBM said it wants to reduce operational complexity for customers by making automating day-to-day operations to ultimately lower administrative costs and concerns. With the new flexible form factors, IBM continues to target hybrid and AI infrastructure buildouts with the Big Iron. In the AI world, the z17 is being utilized for AI inferencing, transactions, training, and key security applications such as fraud detection and insurance claims.

“Enterprise infrastructure is entering a new phase. Organizations need platforms that can support AI-driven growth while navigating resource constraints, evolving business requirements, and increasingly complex hybrid environments,” Tarquinio said. “They are being asked to deploy new AI capabilities while learning new skills, controlling operational costs, and maximizing the value of existing applications and infrastructure.”

A recent IBM Institute study on mainframe usage stated that embedding mainframe to support AI in executing transactions is not temporary: 75% of executives expect mainframe-based applications to remain central to digital transformation, and 60% say mainframe-based platforms are essential to enabling AI innovation.

”Mainframe-anchored systems of record are becoming systems of intelligent execution—not as general‑purpose AI platforms, but as environments where AI acts directly within transactions and in support of them,” the study reported.

Gartner wrote in its “The State of the IBM Mainframe in 2026” report that IBM’s willingness to make significant investments ensure the mainframe modernizes to remain a vital and thriving component of enterprise IT.  

“Most mainframe customers are now prioritizing the reduction of technical debt and adopting platform innovations to future-proof their mainframe environments for the coming decade,” Gartner wrote.

The new z17 single frame and rack mount configurations, LinuxONE Rockhopper 5, and LinuxONE 5 Express will all be available August 12, 2026. IBM Infrastructure Management for IBM Z and IBM LinuxONE will be available August 14.