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Appendix A Bus Hierarchy 33

MAC System Profiler with 2 PCI to PCI Expansion Systems Installed

in a “Fan-Out Configuration.

Daisy-Chaining

Recognizing the typical insignificance of the performance variance

between the “Fan-Out” and “Daisy-Chaining” configurations, the primary

reason for using this one would be limitations on physical space. This

could be the number of available slots on the computer motherboard, or

a lack of desk or rack space.

In the daisy-chain configuration, successive PCI expansion systems are

added to the "end" of the PCI bus hierarchy, which adds "depth" to the

PCI Local Bus by increasing the number of PCI Local Bus levels active

in the system configuration.

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Magma PEHIFX1 Guida Utente Pagina 41