IBM Power 11 Specs
Compare Power11 cores, memory, operating system support, and storage by model. See where S1112 and S1122 stop, when S1124 fits, and why E1150 is different.
Choose a Power11 model by the operating system it can run and the capacity the workload needs. The exception that can ruin an otherwise sensible shortlist is E1150: it supports AIX and Linux but not IBM i.
The first Power11 systems became generally available on July 25, 2025 with six systems. IBM expanded the lineup on July 24, 2026 with the compact S1112. The current family now spans seven named systems: S1112, S1122, S1124, L1122, L1124, E1150, and E1180.
The cards below keep E1150 and E1180 separate because they do not have the same operating system role.
Portfolio snapshot
S1112
Compact entry scale-out for IBM i, AIX, Linux, and VIOS. Half-width 2U rack or tower with up to 512 GB and 4 internal NVMe bays.
S1122
Dense 2U scale-out for IBM i, AIX, and Linux. 4 through 60 cores, up to 4 TB, and 8 internal NVMe bays.
S1124
Larger 4U scale-out for IBM i, AIX, and Linux. 16 through 60 cores, up to 8 TB, and 16 internal NVMe bays.
L1122 and L1124
Linux-focused scale-out systems positioned for Linux on Power estates.
E1150
Enterprise midrange for AIX and Linux only. 16 through 120 cores, up to 16 TB, and no IBM i support.
E1180
Enterprise high-end for IBM i, AIX, and Linux across the largest critical estates.
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.
EJMT 4-core
P05 with 117,300 CPW. rPerf: ST 39.9, SMT2 81.8, SMT4 119.9, and SMT8 148.8. This is the straight entry IBM i refresh configuration.
EJSV 10-core
P10 with 116,500 CPW in Midland's published summary. rPerf: ST 95.4, SMT2 185.6, SMT4 247, and SMT8 298.7. This gives mixed workloads and non-IBM-i partitions more room 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.
This page combines IBM's July 2026 announcement and support material with Midland's published S1112 configuration summaries. Verify final processor, OS, memory, and storage details against the current IBM configuration and announcement tools before ordering.