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Consider the following points: 

GLYPH<SM590000> A CPC drawer always contains a minimum of 15 32GB DIMMs as listed in drawer configuration number 19 in Table 2-6 on page 59. 

GLYPH<SM590000> A CPC drawer can have more memory installed than is enabled. The amount of memory that can be enabled by the client is the total physically installed memory minus the RAIM amount (20%) and minus the 256 GB of HSA memory. 

GLYPH<SM590000> A CPC drawer can have available unused memory, which can be ordered as a memory upgrade and enabled by LIC-CC without DIMM changes. 

GLYPH<SM590000> DIMM changes require a disruptive power-on reset (POR) on z15 with a single CPC drawer. DIMM changes can be done concurrently on z15 models with multiple CPC drawers using Enhanced Drawer Availability (EDA). 

DIMM plugging for the configurations in each CPC drawer do not have to be similar. Each memory 5 slot DIMM bank must have the same DIMM size; however, a drawer can have a mix of DIMM banks. Table 2-7 lists the memory population by DIMM bank for the 15 configurations that are listed in Table 2-6 on page 59. 

As an example, for configuration #14, memory positions MD06-MD10 are populated with five 128 GB DIMMS. 

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