2.8.2 Model capacity identifier Granular capacity List of model capacity identifiers To recognize how many PUs are characterized as CPs, the Store System Information (STSI)  instruction returns a Model Capacity Identifier (MCI). The MCI determines the number and  speed of characterized CPs. Characterization of a PU as an IFL, ICF, or zIIP is not reflected in  the output of the STSI instruction because characterization has no effect on software  charging. For more information about STSI output, see “Processor identification” on  page 375. The following distinct model capacity identifier ranges are recognized (one for full capacity  and three for granular capacity):  The z15 server offers 102 capacity settings at the low end of the processor. Only 34 CPs can  have granular capacity. When subcapacity settings are used, other PUs beyond 34 can be  characterized only as specialty engines. The three defined ranges of subcapacity settings have model capacity identifiers numbered  401- 434, 501 - 534, and 601 - 634. Consideration:  All CPs have the same capacity identifier. Specialty engines (IFLs, zIIPs,  and ICFs) operate at full speed. Regardless of the number of CPC drawers, a configuration with one characterized CP is  possible, as listed in Table 2-11. For more information about temporary capacity increases, see Chapter 8, “System upgrades”  on page 331. Table 2-11 Model capacity identifiers GLYPH<SM590000> For full-capacity engines, model capacity identifiers 701 - 7J0 are used. They express  capacity settings for 1 - 190 characterized CPs. GLYPH<SM590000> Three model capacity identifier ranges offer a unique level of granular capacity at the low  end. They are available when no more than 34 CPs are characterized. These three  subcapacity settings are applied to up to 34 CPs, which combined offer 102 more capacity  settings. For more information, see “Granular capacity”. Chapter 2. Central processor complex hardware components  75 Feature Model capacity identifier Max34 701 - 734, 601 - 634, 501 - 534, and 401 - 434 Max71 701 - 771, 601 - 634, 501 - 534, and 401 - 434 Max108 701 - 7A8, 601 - 634, 501 - 534, and 401 - 434 Max145 701 - 7E5, 601 - 634, 501 - 534, and 401 - 434 Max190 701 - 7J0, 601 - 634, 501 - 534, and 401 - 434