IBM z/OS manual Processor Unit Assignments, Processor Memory, Channels, Coupling Links

Processor Unit Assignments

Model	Min. PU*	Max. PU	SAP Standard	Spares Standard
A08**	1	8	2	2
B16**	1	16	4	4
C24**	1	24	6	6
D32**	1	32	8	8

*PU can be characterized as CP, IFL, ICF, Optional SAPs, unassigned CPs, and/or unassigned IFLs up to a max number of PUs for the model **Customer will be required to purchase at least one CP, IFL or ICF feature for any model.

Processor Memory

z990 Model	Minimum	Maximum
A08	16 GB	64 GB
B16	16 GB	128 GB
C24	16 GB	192 GB
D32	16 GB	256 GB

Max two memory cards per z990 book. Memory cards 8 GB, 16 GB or 32 GB.

Channels

Model	A08	B16	C24	D32
ESCON Min	0	0	0	0
**ESCON Max	720	1024	1024	1024
FICON *Min	0	0	0	0
FICON *Max	96	120	120	120

*FICON Express and FCP configured on the same FICON Express features. Max channels total 120.

**ESCON increments of 4 channels

Coupling Links

Links	IC	ICB-2*	ICB-3**	ICB-4	ISC-3	Max Links
	0-32	0-8	0-16	0-16	0-48	Total External
						and Internal
						links = 64
*requires STI-2 card
**requires STI-3 card

Note: At least one I/O channel (FICON, ESCON) or one coupling link (ISC, ICB) must be present.

Cryptographic Features

	PCICA1, 2	PCIXCC2
Minimum	0	0
Maximum	63	44

1.Max two PCICA features per I/O cage

2.Max eight PCICA and PCIXCC features per system

3.Two accelerator cards per PCICA feature

4.One coprocessor per PCIXCC feature

OSA-Express Features

	OSA-Express* Features
Minimum	0
Maximum	24

*Any combination of GbE LX, GbE SX, 1000BASE-T Ethernet, Token-Ring

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