IBM Power 11 Specs

The first Power11 systems became generally available on July 25, 2025. IBM expanded that lineup on July 24, 2026 with the Power S1112, a new compact one-socket model aimed at smaller on-prem, branch, and near-edge deployments. That means the current Power11 family now spans seven named systems: S1112, S1122, S1124, L1122, L1124, E1150, and E1180.

This page focuses on what the new S1112 changes technically and commercially, because that is where buyers can get tripped up if they are still reading Power11 as a six-system story.

Portfolio snapshot

System	Positioning	Operating system posture	Ceiling or footprint note
S1112	Compact entry scale-out	IBM i, AIX, Linux, VIOS	Half-width 2U rack or tower, up to 512 GB and 4 internal NVMe bays
S1122	Dense 2U scale-out	IBM i, AIX, Linux	Up to 60 Power11 cores and up to 4 TB of memory
S1124	Larger 4U scale-out	IBM i, AIX, Linux	Higher scale-out headroom and I/O growth than the 2U systems
L1122 and L1124	Linux-focused scale-out	Linux on Power	Same architecture family, positioned specifically for Linux estates
E1150 and E1180	Enterprise Power11	IBM i, AIX, Linux	Built for larger consolidation, transactional density, and enterprise resilience

S1112 processor and benchmark details

Midland's published S1112 summaries identify two processor options in the new compact box: the 4-core EJMT option at 3.6 to 4.0 GHz and the 10-core EJSV option at 3.05 to 4.0 GHz. The EJMT configuration is positioned in IBM i Software Tier P05, while the EJSV configuration steps into P10. That difference is more important than the raw core count alone because it changes who should even be comparing the two builds.

Configuration	IBM i tier	CPW	rPerf summary	Practical read
EJMT 4-core	P05	117,300	ST 39.9, SMT2 81.8, SMT4 119.9, SMT8 148.8	Best read as the straight entry IBM i refresh configuration.
EJSV 10-core	P10	116,500 in Midland's published summary	ST 95.4, SMT2 185.6, SMT4 247, SMT8 298.7	Much stronger mixed-workload and non-IBM-i platform option in the same compact chassis.

Memory, storage, and I/O in the S1112

What makes the S1112 viable is not only the processor choice. It is the way IBM packaged enough modern platform capability into a much smaller box. Midland's current S1112 configuration pages list up to 512 GB of DDR5 memory across 4 DDIMM slots, up to 12.8 TB of internal NVMe U.2 flash across 4 bays, and 4 direct PCIe adapter locations. IBM's 9242-21B and 9242-21T documentation also confirms 4 direct adapter positions and 4 internal NVMe U.2 locations, with optional ENZ0 PCIe expansion support for buyers who need more adapters than the compact chassis provides natively.

Operating system support and IBM i boundaries

IBM's July 15, 2026 IBM i enhancement material explicitly identifies the S1112 as the new entry Power11 server for IBM i P05 customers and ties support to IBM i 7.5 TR8. Midland's S1112 configuration pages go further by listing IBM i 7.6 TR2, IBM i 7.5 TR8, and IBM i 7.4 TR12 with additional PTFs, alongside current AIX, VIOS, Red Hat, OpenShift, and SUSE levels.

The key buyer nuance is that S1112 should not be read as a tiny S1122 with identical IBM i scaling behavior. Midland's current published guidance keeps IBM i on S1112 bounded at 4 cores, 64 GB, and mirrored internal storage limits even when the broader platform includes more resources. That is why S1112 is a precise fit for smaller IBM i footprints, and why the S1122 becomes the better comparison as soon as native IBM i growth is the real issue.

Virtualization: PowerVM and VIOS

Power11 systems run PowerVM for logical partitioning and workload consolidation, with the Virtual I/O Server managing shared virtual storage and network resources across partitions. On S1112 specifically, this becomes part of the economic story: the box is attractive precisely because it can host a small IBM i workload while still dedicating additional platform resources to Linux, AIX, or VIOS partitions when the wider design calls for it. See the Virtualization and Management section of the Library for a deeper walkthrough.

Management, support, and deployment posture

The S1112 keeps proper Power operational discipline rather than acting like a stripped-down appliance. Midland lists an embedded baseboard management controller, a dedicated HMC 1 GbE port, redundant hot-swap cooling, and redundant hot-swap AC Titanium power supplies. IBM also introduced a Premium Essentials Expert Care tier specifically for S1112, which is another hint that IBM expects the model to land in leaner IT environments that still want fast access to Power expertise.

When buyers should move past S1112

If the project needs more than a compact footprint, more native IBM i headroom, or more sustained scale-out growth than 512 GB and 4 direct NVMe bays suggest, the shortlist should move quickly to S1122 or S1124. S1112 is a sharp product when the constraint is size and entry economics. It is the wrong product when the constraint is long-term scale inside IBM i itself.

Compare S1112 Against the Rest of Power 11