{
  "dataset": "IBM Power P05 Software Tier Generation Comparison",
  "version": "1.0",
  "date_modified": "2026-07-17",
  "source": {
    "name": "Midland Information Systems",
    "author": "Robert MacAdams",
    "article": "IBM Power System Specifications and Performance Comparison for P05 Software Tier",
    "url": "https://midlandinfosys.com/blog/ibm-s1112-p05-power11-performance-comparison",
    "date_published": "2026-07-14"
  },
  "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) figures are IBM's published relative performance measurement for IBM i commercial workloads. Percentage and multiple comparisons use the Power11 S1112 four-core (EJMT) configuration as the baseline.",
  "systems": [
    {
      "id": "power11-s1112",
      "generation": "Power11",
      "model": "S1112",
      "machine_type_model": "9242-21B",
      "processor_feature_code": "EJMT",
      "processor_module": "1 eSCM",
      "available_processor_cores": "4 or 10",
      "p05_configuration": "EJMT 4-core, 3.6-4.0 GHz",
      "cpw_per_core": 29325,
      "maximum_p05_cpw": 117300,
      "power11_cpw_advantage_pct": null,
      "power11_cpw_advantage_note": "Baseline",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 64,
      "memory_bandwidth_gbps": 256,
      "power11_bandwidth_advantage_pct": null,
      "power11_bandwidth_advantage_note": "Baseline",
      "memory_slots": 4,
      "memory_technology": "4000-4800 MHz 16-Gbit DDR5 DDIMM",
      "l2_cache_per_core": "To be determined",
      "l3_cache_per_core": "To be determined",
      "maximum_internal_storage_raw_tb": 12.8,
      "maximum_internal_storage_mirrored_tb": 6.4,
      "maximum_ibm_i_drives": "4 NVMe U.2",
      "san_attachment": "Supported",
      "io_drawer": "Half I/O drawer",
      "maximum_pcie_slots": 4,
      "pcie_slot_detail": "Two PCIe Gen4 x16 direct slots, two PCIe Gen4 x8 direct slots",
      "ibm_i_min_support": "IBM i 7.6 TR2, IBM i 7.5 TR8, or IBM i 7.4 TR12 with required PTFs",
      "ibm_i_max_support": "To be determined"
    },
    {
      "id": "power10-s1014",
      "generation": "Power10",
      "model": "S1014",
      "machine_type_model": "9105-41B",
      "processor_feature_code": "EPG0",
      "processor_module": "1 eSCM",
      "available_processor_cores": "4, 8, or 24",
      "p05_configuration": "EPG0 4-core, 3.0-3.90 GHz",
      "cpw_per_core": 26575,
      "maximum_p05_cpw": 106300,
      "power11_cpw_advantage_pct": 10.3,
      "power11_cpw_advantage_note": "Power11 provides approximately 10.3% more CPW performance",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 50,
      "memory_bandwidth_gbps": 204,
      "power11_bandwidth_advantage_pct": 25.5,
      "power11_bandwidth_advantage_note": "Power11 provides approximately 25.5% more memory bandwidth",
      "memory_slots": 8,
      "memory_technology": "3200 MHz 8-Gbit DDR4 DDIMM or 16-Gbit DDR5 DDIMM",
      "l2_cache_per_core": "2 MB",
      "l3_cache_per_core": "8 MB",
      "maximum_internal_storage_raw_tb": 6.4,
      "maximum_internal_storage_mirrored_tb": 3.2,
      "maximum_ibm_i_drives": "4 NVMe U.2",
      "san_attachment": "Supported",
      "io_drawer": "Half I/O drawer",
      "maximum_pcie_slots": 5,
      "pcie_slot_detail": "One PCIe Gen5 x8 or Gen4 x16 direct slot, three PCIe Gen5 x8 direct slots, one PCIe Gen4 x8 direct slot",
      "ibm_i_min_support": "IBM i 7.3 TR12 with PTF SI80671",
      "ibm_i_max_support": "IBM i 7.6, to be determined"
    },
    {
      "id": "power10-s1012-1core",
      "generation": "Power10",
      "model": "S1012 (1-core)",
      "machine_type_model": "9028-21B",
      "processor_feature_code": "EPG3",
      "processor_module": "1 eSCM",
      "available_processor_cores": "1, 4, or 8",
      "p05_configuration": "EPG3 1-core, 3.0-3.90 GHz",
      "cpw_per_core": 29000,
      "maximum_p05_cpw": 29000,
      "power11_cpw_advantage_pct": 304.5,
      "power11_cpw_advantage_note": "Power11 provides approximately 304.5% more total CPW (configuration difference: 4 active cores vs 1); per-core difference is only about 1.1%",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 50,
      "memory_bandwidth_gbps": 102,
      "power11_bandwidth_advantage_pct": 151.0,
      "power11_bandwidth_advantage_note": "Power11 provides approximately 151% more memory bandwidth",
      "memory_slots": 8,
      "memory_technology": "3200 MHz 8-Gbit DDR4 ISDIMM",
      "l2_cache_per_core": "2 MB",
      "l3_cache_per_core": "8 MB",
      "maximum_internal_storage_raw_tb": 12.8,
      "maximum_internal_storage_mirrored_tb": 6.4,
      "maximum_ibm_i_drives": "4 NVMe U.2",
      "san_attachment": "Supported",
      "io_drawer": "Not available",
      "maximum_pcie_slots": 4,
      "pcie_slot_detail": "Two PCIe Gen4 x16 direct slots, two PCIe Gen4 x8 direct slots",
      "ibm_i_min_support": "IBM i 7.4 TR10",
      "ibm_i_max_support": "IBM i 7.6, to be determined"
    },
    {
      "id": "power10-s1012-4core",
      "generation": "Power10",
      "model": "S1012 (4-core)",
      "machine_type_model": "9028-21B",
      "processor_feature_code": "EPG7",
      "processor_module": "1 eSCM",
      "available_processor_cores": "1, 4, or 8",
      "p05_configuration": "EPG7 4-core, 3.0-3.90 GHz",
      "cpw_per_core": 27825,
      "maximum_p05_cpw": 111300,
      "power11_cpw_advantage_pct": 5.4,
      "power11_cpw_advantage_note": "Power11 provides approximately 5.4% more total processing capacity (closest older system to Power11 in the P05 tier)",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 50,
      "memory_bandwidth_gbps": 102,
      "power11_bandwidth_advantage_pct": 151.0,
      "power11_bandwidth_advantage_note": "Power11 provides approximately 151% more memory bandwidth",
      "memory_slots": 8,
      "memory_technology": "3200 MHz 8-Gbit DDR4 ISDIMM",
      "l2_cache_per_core": "2 MB",
      "l3_cache_per_core": "8 MB",
      "maximum_internal_storage_raw_tb": 12.8,
      "maximum_internal_storage_mirrored_tb": 6.4,
      "maximum_ibm_i_drives": "4 NVMe U.2",
      "san_attachment": "Supported",
      "io_drawer": "Not available",
      "maximum_pcie_slots": 4,
      "pcie_slot_detail": "Two PCIe Gen4 x16 direct slots, two PCIe Gen4 x8 direct slots",
      "ibm_i_min_support": "IBM i 7.4 TR10",
      "ibm_i_max_support": "IBM i 7.6, to be determined"
    },
    {
      "id": "power9-s914",
      "generation": "Power9",
      "model": "S914",
      "machine_type_model": "9009-41G",
      "processor_feature_code": "EP50",
      "processor_module": "1 SCM",
      "available_processor_cores": "4, 6, or 8",
      "p05_configuration": "EP50 4-core, 2.3-3.8 GHz",
      "cpw_per_core": 13125,
      "maximum_p05_cpw": 52500,
      "power11_cpw_advantage_pct": 123.4,
      "power11_cpw_advantage_note": "Power11 provides approximately 123.4% more CPW, roughly 2.23 times the processing capacity",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 50,
      "memory_bandwidth_gbps": 170,
      "power11_bandwidth_advantage_pct": 50.6,
      "power11_bandwidth_advantage_note": "Power11 provides approximately 50.6% more memory bandwidth",
      "memory_slots": 16,
      "memory_technology": "2666-2933 MHz 16-Gbit DDR4 RDIMM",
      "l2_cache_per_core": "512 KB",
      "l3_cache_per_core": "10 MB",
      "maximum_internal_storage_raw_tb": 6.4,
      "maximum_internal_storage_mirrored_tb": 3.2,
      "maximum_ibm_i_drives": "4 NVMe U.2 or 10 HDD/SSD",
      "san_attachment": "Supported",
      "io_drawer": "Half I/O drawer",
      "maximum_pcie_slots": 8,
      "pcie_slot_detail": "Three PCIe Gen4 x16 slots, five PCIe Gen4 x8 slots",
      "ibm_i_min_support": "IBM i 7.2 RS 720-Q",
      "ibm_i_max_support": "IBM i 7.5"
    },
    {
      "id": "power8-s814",
      "generation": "Power8",
      "model": "S814",
      "machine_type_model": "8286-41A",
      "processor_feature_code": "EPXK",
      "processor_module": "1 DCM",
      "available_processor_cores": "4, 6, or 8",
      "p05_configuration": "EPXK 4-core, 3.02 GHz",
      "cpw_per_core": 9360,
      "maximum_p05_cpw": 37440,
      "power11_cpw_advantage_pct": 213.2,
      "power11_cpw_advantage_note": "Power11 provides approximately 213.2% more CPW, roughly 3.13 times the processing capacity",
      "installed_memory_gb": 64,
      "usable_ibm_i_memory_gb": 50,
      "memory_bandwidth_gbps": 192,
      "power11_bandwidth_advantage_pct": 33.3,
      "power11_bandwidth_advantage_note": "Power11 provides approximately 33.3% more memory bandwidth",
      "memory_slots": 8,
      "memory_technology": "1600 MHz 4-Gbit DDR4 CDIMM",
      "l2_cache_per_core": "512 KB",
      "l3_cache_per_core": "8 MB",
      "maximum_internal_storage_raw_tb": 3.0,
      "maximum_internal_storage_mirrored_tb": null,
      "maximum_ibm_i_drives": "10 HDD/SSD",
      "san_attachment": "Supported",
      "io_drawer": "Not supported",
      "maximum_pcie_slots": 8,
      "pcie_slot_detail": "Two PCIe x16 slots, five PCIe x8 slots specifically listed (final configuration should be verified)",
      "ibm_i_min_support": "IBM i 7.1 TR8",
      "ibm_i_max_support": "IBM i 7.4"
    }
  ]
}