IBM Power P05 Generation Comparison Dataset
A structured, downloadable dataset comparing CPW, memory bandwidth, internal storage, and PCIe capacity across the IBM Power11 S1112 and the Power10, Power9, and Power8 systems in the IBM i P05 software tier.
This dataset compares the IBM Power11 S1112 (machine type 9242-21B) with four earlier IBM Power systems in the IBM i P05 software tier: the Power10 S1014, the Power10 S1012 (in both its one-core and four-core configurations), the Power9 S914, and the Power8 S814. All figures are structured for machine-readable use and are available as CSV and JSON downloads below.
The underlying research and analysis originates from Midland Information Systems' IBM Power System Specifications and Performance Comparison for P05 Software Tier (Robert MacAdams, July 14, 2026). This page restructures that research into a citable, versioned dataset with defined variables and downloadable distributions.
Systems Compared
| Specification | Power11 S1112 | Power10 S1014 | Power10 S1012 1-core | Power10 S1012 4-core | Power9 S914 | Power8 S814 |
|---|---|---|---|---|---|---|
| Machine type and model | 9242-21B | 9105-41B | 9028-21B | 9028-21B | 9009-41G | 8286-41A |
| Processor module | 1 eSCM | 1 eSCM | 1 eSCM | 1 eSCM | 1 SCM | 1 DCM |
| Available processor cores | 4 or 10 | 4, 8, or 24 | 1, 4, or 8 | 1, 4, or 8 | 4, 6, or 8 | 4, 6, or 8 |
| IBM i P05 processor configuration | EJMT 4-core, 3.6-4.0 GHz | EPG0 4-core, 3.0-3.90 GHz | EPG3 1-core, 3.0-3.90 GHz | EPG7 4-core, 3.0-3.90 GHz | EP50 4-core, 2.3-3.8 GHz | EPXK 4-core, 3.02 GHz |
CPW Performance Comparison
| Specification | Power11 S1112 | Power10 S1014 | Power10 S1012 1-core | Power10 S1012 4-core | Power9 S914 | Power8 S814 |
|---|---|---|---|---|---|---|
| CPW per core | 29,325 | 26,575 | 29,000 | 27,825 | 13,125 | 9,360 |
| Maximum P05 CPW | 117,300 | 106,300 | 29,000 | 111,300 | 52,500 | 37,440 |
| Power11 maximum CPW advantage | Baseline | 10.3% | 304.5% total capacity (1.1% per core) | 5.4% | 123.4% | 213.2% |
The four-core Power10 S1012 (EPG7) is the closest older system to the Power11 S1112 in the P05 tier, at 111,300 CPW versus 117,300 CPW. The one-core Power10 S1012 (EPG3) configuration should be read separately: at 29,000 CPW per its single active core, its per-core rate is within about 1.1% of Power11, but it has only one of Power11's four active P05 cores.
Memory and Bandwidth Comparison
| System | Installed memory | Usable IBM i memory | Memory bandwidth | Power11 bandwidth advantage | Memory slots | Memory technology |
|---|---|---|---|---|---|---|
| Power11 S1112 | 64 GB | 64 GB | 256 GB/s | Baseline | 4 | 4000-4800 MHz 16-Gbit DDR5 DDIMM |
| Power10 S1014 | 64 GB | 50 GB | 204 GB/s | 25.5% | 8 | 3200 MHz 8-Gbit DDR4 DDIMM or 16-Gbit DDR5 DDIMM |
| Power10 S1012 (either config) | 64 GB | 50 GB | 102 GB/s | 151.0% | 8 | 3200 MHz 8-Gbit DDR4 ISDIMM |
| Power9 S914 | 64 GB | 50 GB | 170 GB/s | 50.6% | 16 | 2666-2933 MHz 16-Gbit DDR4 RDIMM |
| Power8 S814 | 64 GB | 50 GB | 192 GB/s | 33.3% | 8 | 1600 MHz 4-Gbit DDR4 CDIMM |
Power11 is the only system in this comparison where all 64 GB of installed memory is usable by IBM i; every older system in the set loses roughly 14 GB (28%) to firmware overhead.
Internal Storage Comparison
| System | Maximum internal IBM i storage | Maximum IBM i drives | Power11 capacity advantage |
|---|---|---|---|
| Power11 S1112 | 12.8 TB raw / 6.4 TB mirrored | 4 NVMe U.2 | Baseline |
| Power10 S1014 | 6.4 TB raw / 3.2 TB mirrored | 4 NVMe U.2 | 2.00x |
| Power10 S1012 (either config) | 12.8 TB raw / 6.4 TB mirrored | 4 NVMe U.2 | Equal |
| Power9 S914 | 6.4 TB raw / 3.2 TB mirrored | 4 NVMe U.2 or 10 HDD/SSD | 2.00x |
| Power8 S814 | 3 TB | 10 HDD/SSD | Approximately 4.27x |
PCIe and I/O Expansion Comparison
| System | Maximum PCIe slots | Slot detail | I/O drawer |
|---|---|---|---|
| Power11 S1112 | 4 | Two PCIe Gen4 x16 direct slots, two PCIe Gen4 x8 direct slots | Half I/O drawer supported |
| Power10 S1014 | 5 | One PCIe Gen5 x8 or Gen4 x16 direct slot, three PCIe Gen5 x8 direct slots, one PCIe Gen4 x8 direct slot | Half I/O drawer supported |
| Power10 S1012 | 4 | Two PCIe Gen4 x16 direct slots, two PCIe Gen4 x8 direct slots | Not available |
| Power9 S914 | 8 | Three PCIe Gen4 x16 slots, five PCIe Gen4 x8 slots | Half I/O drawer supported |
| Power8 S814 | 8 | Two PCIe x16 slots, five PCIe x8 slots specifically listed (final configuration should be verified) | Not supported |
Newer systems provide greater bandwidth per slot, but Power9 and Power8 provide more physical PCIe positions. Adapter and drive requirements should be reviewed as part of any migration plan.
Downloads
The complete dataset is available in two machine-readable formats:
Methodology and Sources
Research methodology: Specifications and performance figures were compiled from IBM product documentation, IBM Power11/Power10/Power9/Power8 datasheets, and Midland Information Systems technical comparison research. CPW (Commercial Processing Workload) is IBM's published relative performance measurement for IBM i commercial workloads; it is useful for estimating comparative processing capacity, though actual application performance also depends on memory, storage, database design, software configuration, and workload characteristics. All percentage and multiple comparisons use the Power11 S1112 four-core (EJMT) configuration as the baseline. Values marked "to be determined" in the source research should be verified before use in a final customer configuration or proposal.
Primary source: Robert MacAdams, "IBM Power System Specifications and Performance Comparison for P05 Software Tier", Midland Information Systems, published July 14, 2026.
Version History
Version 1.0 — Published 2026-07-17. Initial dataset publication covering the Power11 S1112, Power10 S1014, Power10 S1012 (1-core and 4-core), Power9 S914, and Power8 S814 in the IBM i P05 software tier.