i just looking for some words for my problem. Protool's web say this: (it's possible crash it?)
Apple Power Mac G5 Qualification for Pro Tools Systems
Pro Tools|24 MIX, older Digidesign & Third-Party PCI Cards Will Not be Supported on G5
Apple's Power Mac G5 computers include technical changes to PCI card support which renders Pro Tools|24 MIX, and some other Digidesign and third-party PCI cards incompatible.
The G5's PCI slots accommodate 3.3 volt-powered PCI cards only, compared to the G4's PCI slots which supported mixed voltage cards (5.0 V, 12 V, or 3.3 V). While some of Digidesign's PCI cards are compatible with both 5.0 V or 3.3 V PCI slots, others require 5.0 V-capable PCI slots and will not fit in the PCI slots of a Power Mac G5.
All Pro Tools|HD core cards, HD Process cards, and HD Accel cards are fully compatible with the Power Mac G5.
Although MIX Core and MIX Farm cards are 5.0 or 3.3 volt-powered PCI cards, other changes in the Power Mac G5's PCI architecture have reduced performance of these cards to the point where Digidesign cannot support them in a Power Mac G5. Please see the following message from Digidesign:
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