{"slug": "ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount", "title": "IBM Expands z17 and LinuxONE 5 Mainframe Lineups With Single Frame and Rackmount Servers", "summary": "IBM is expanding its z17 and LinuxONE 5 mainframe lineups with single-frame and rackmount servers, including the LinuxONE Express, to target customers needing smaller-scale systems. The new hardware, based on the Telum II processor and Spyre AI accelerator, follows record mainframe sales in 2025 and aims to grow IBM's mainframe user base.", "body_md": "In this age of agentic AI and Arm servers you would not think it, but IBM just had its best year in the last two decades for mainframe sales. Benefitting from a surge in demand and a new hardware platform for IBM’s mainframe lineup – the z17 series and its Telum II processor – 2025 was one of the best years ever for mainframe systems on this side of the millennial divide.\n\nComing off of that record momentum, IBM is taking the next step in the release of the z17 series and associated fifth-generation LinuxONE systems with a new set of smaller-scale hardware for their respective families. After launching their big iron multi-rack systems in 2025, for the summer of 2026 IBM is preparing to release single-frame mainframes and even rack mount offerings to complete the z17 and LinuxONE lineups. These smaller systems will be aimed at customers who are after the features of IBM’s mainframes but do not need quite as much performance as the multi-rack systems offer.\n\nAnd in an interesting move, IBM is even going one step beyond by releasing a standalone rack mount box, the LinuxONE Express, to serve as a gateway for onboarding new customers and growing their mainframe user base.\n\n### z17 & LinuxONE 5: Built from Telum II & Spyre Processors\n\nBoth of these new mainframe collections are fundamentally a smaller collection of hardware based on IBM’s existing z17 platform. Launched last year, the z17 platform is based around IBM’s Telum II processor, which is an 8-core chip built on Samsung’s 5HPP process. With hardware compatibility for programs going back to IBM’s original sixty-year-old System/360 platform, Telum II is a chip like no other.\n\nOur own Patrick Kennedy had a chance to go [hands-on with the chip](https://www.servethehome.com/the-new-ibm-z17-telum-ii-processor-module-cut-open-down-to-silicon/) last year when [IBM first launched the z17 series](https://www.servethehome.com/the-ibm-z17-mainframe-brings-ai-with-telum-ii-and-spyre/). At 600mm2, [Telum II](https://www.servethehome.com/ibm-telum-ii-processor-and-spyre-ai-updates-at-hot-chips-2024/) puts the “big” in “big iron,” as IBM built a chip that approaches the limits of Samsung’s 5nm process node while still pulling off a 5.5GHz clockspeed. At only 8 cores, the Telum II chip is not particularly dense in comparison to modern x86 and Arm chips, so besides its high single-core performance, IBM is primarily relying on scaling it out in larger clusters of up to 32 chips to get to higher core counts.\n\nIn a sign of the times, one of the big features of the z17 series (and fifth-generation LinuxONE) was AI processing, which saw IBM introduce a contemporary, 24 TOPS AI accelerator block for CPU-based inference.\n\nAnd if that was not enough AI performance for IBM’s mainframe user base, the alongside the Telum II CPU IBM also gave the chip a dedicated AI accelerator, the Spyre. The PCIe card houses what is essentially a larger version of the AI accelerator block from Telum II, allowing it to be used similarly to the on-CPU accelerator block, but with higher performance from being its own dedicated chip.\n\nThanks in big part to Telum II and Spyre, in their first three quarters on the market the IBM z17 series and LinuxONE Emperor 5 mainframes have outpaced sales of the prior z16 series mainframes – which themselves were already outpacing the earlier z15 series. All of which is to say that IBM’s latest generation of mainframes have proven to be rather lucrative, and arguably surprisingly so.\n\n### A Smaller Piece of the Big Iron: z17 Single-Frame Systems, Rackmount, & LinuxONE Rockhopper 5\n\nBut for all of the success of IBM’s z17 and LinuxONE Emperor 5 mainframes in their first year on the market, IBM’s big iron product lineup focused first and foremost on the company’s biggest customers in the finance, insurance, healthcare, and other heavily-regulated industries. As a result, the initial systems being offered by IBM were all of their multi-rack (multi-frame) systems aimed at large enterprise customers who needed upwards of several rack’s worth of equipment to meet their needs.\n\nNow, a bit more than a year after the z17 series first launched, IBM is releasing a smaller set of systems based on the same hardware. Both the z17 series as well as the LinuxONE series are getting single-frame and rack mount versions of the hardware, which are intended for customers who only need a single rack or less.\n\nAt the mid-scale level is the new z17 ME2, which is a complete, turnkey single-frame z17 system. The ME2 can be configured with up to two processor draws, which allows for up to 82 cores spread over 16 Telum II processors. Those chips, in turn, can be paired with up to 18TB of memory. Notably, this is not a full frame, so there are RUs available for customers to install additional non-IBM equipment (such as network switches) if needed.\n\nMeanwhile the rack mount version of the z17 family, the z17 MER, offers essentially the same specifications, but does not come as a turn-key solution. Rather, these are sold as individual rack mount server drawers so that they can be installed into a standard 19-inch rack. The idea being that the rack mount version of the z17 can be installed in colocation facilities or other facilities where even IBM’s turnkey ME2 rack would not be appropriate.\n\nThe adjacent LinuxONE lineup is also getting their own version of this smaller system hardware as well. Being sold under the name LinuxONE Rockhopper 5 (keeping with IBM’s penguin theme), Big Blue will similarly be seeing LinuxONE mainframes that can be purchased as either a single frame or in individual servers to go into a 19-inch rack.\n\nUltimately, these new mainframes replace their z16-generation counterparts, such as the z16 A02. IBM is no stranger to offering mainframes in a single frame (or less), so these new systems fill the same general niche. Though with the higher performance and feature set offered by the z17-generation hardware. On a generational basis this amounts to around a 10% increase in throughput per core, a 20% increase in total core counts, and a 12% increase in memory capacity.\n\nOtherwise, as both of these collections of mainframes are smaller groupings of Telum II CPUs, Spyre accelerators, and other associated z17 hardware, other than total performance both of these systems are feature-identical to their existing multi-frame counterparts. For IBM that means an emphasis on backwards compatibility for the z17 series, the eight-nines reliability of the systems (under 1 second of downtime per year), and especially following recent trends, the AI functionality that has helped to define the platform. Based on IBM’s pre-briefing, it is notable that the company is taking a particular interest in the push for on-premise AI computing, which heavily overlaps with the kind of security-paranoid customers that IBM’s mainframes have traditionally appealed to.\n\n### LinuxONE Gets a Turnkey Server: LinuxONE Express\n\nLast but certainly not least, IBM has one final mainframe offering they are announcing this morning, and this one is specifically for the LinuxONE market. Dubbed the LinuxONE Express, this is a new product segment for IBM that is an even smaller LinuxONE offering, comprised of a single 18U rackmount server that is a turnkey solution meant to be installed in a 19-inch rack. In practice it is a smaller LinuxONE Rockhopper 5 configuration that is built and sold as a single box.\n\nThe Express is designed to fill several roles within the IBM LinuxONE lineup, not the least of which is offering a smaller system for clients who do not even need a single-frame’s worth of hardware. But even more than that, the system is designed to serve as an on-ramp for customers who want to get in to the LinuxONE ecosystem. In other words, to offer potential customers a way to buy a single box to serve as an evaluation system, and then from there they can grow into larger LinuxONE offerings down the line.\n\nOf all of the systems being announced today, the Express may very well prove to be the most significant. Between IBM’s two mainframe offerings, the LinuxONE side of the business is already delivering the majority of IBM’s revenue growth as it is more focused on contemporary customers than the legacy-focused Z family (despite the shared hardware). As a result, IBM is keen to fuel that growth by making it even easier to bring new customers on board.\n\nThe LinuxONE Express will also be unique among IBM mainframes because it will have a public and published starting price tag: $165,000. IBM’s mainframe offerings have for the last several years been priced per customer as part of IBM’s “Tailored Fit Pricing” model, which sought to align mainframe configurations and pricing with customers’ workloads. The LinuxONE Express, on the other hand, has a fixed price tag for the system from the get-go, which like the existence of the system itself is designed to simplify things for potential customers to give them a smoother on-ramp to the LinuxONE ecosystem by making the system cost known in advance.\n\n### Final Words\n\nWith the latest additions to IBM’s mainframe lineup, the company is finally expanding the z17 and LinuxONE 5 series to reach their smaller customers. By offering a smaller serving of their Telum II and Spyre hardware, IBM is looking to fill the need for single-frame (and smaller) systems, something the initial z17 and LinuxONE Emperor 5 could not fulfill.\n\nAnd while IBM’s fleshed out mainframe lineups seem primed to continue the success the company has seen so far over the past year with the z17 series hardware, the LinuxONE Express, IBM’s smallest modern mainframe, will be something to keep a close eye on. By offering a turnkey 18U box, IBM believes that they can attract new customers in a way that their larger LinuxONE mainframes ever could. The Express marks something of a new market for IBM both in form factor and in how the system is priced and sold. So it will be interesting to see how that pans out for the company and how it impacts the already-upward trajectory of LinuxONE system sales.\n\nWrapping things up, all of IBM’s new mainframe systems will be going on sale next month. The company says to expect general availability on August 12th.", "url": "https://wpnews.pro/news/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount", "canonical_source": "https://www.servethehome.com/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount-servers/", "published_at": "2026-07-07 13:00:32+00:00", "updated_at": "2026-07-07 21:08:02.040145+00:00", "lang": "en", "topics": ["ai-chips", "ai-infrastructure", "ai-products"], "entities": ["IBM", "z17", "LinuxONE 5", "Telum II", "Spyre", "Samsung", "LinuxONE Express", "LinuxONE Rockhopper 5"], "alternates": {"html": "https://wpnews.pro/news/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount", "markdown": "https://wpnews.pro/news/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount.md", "text": "https://wpnews.pro/news/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount.txt", "jsonld": "https://wpnews.pro/news/ibm-expands-z17-and-linuxone-5-mainframe-lineups-with-single-frame-and-rackmount.jsonld"}}