Apple's decision to usher in a new PCI architecture (PCI-X) with its new Power Mac G5 promises a new era of performance, but may affect Mac users who rely on certain PCI cards.G5s introduce different configurations of PCI bus speed and combinations of 33MHz, 100MHz and 133MHz PCI/PCI-X slots. The PCI specification adopted by Apple in its new machines conforms to PCI Specification 2.3, which does not support 5V PCI cards, as it introduces a new card architecture. MPEG and DVD encoder-solutions company Wired Inc's president Mike Evangelist warns that "5V cards will not even fit into the sockets".
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