TITLE
    Power Macintosh: PCI Card Power Requirements (6/96)
Article ID:
Created:
Modified: 		19141
1/3/96
6/6/96
TOPIC


    I am adding PCI cards to my Power Macintosh computer and would like to know how many I can add and what the power requirements are for the PCI slots.

DISCUSSION


    The Power Macintosh 7200, 7500 and 8500 computers have three expansion slots, which use the industry standard Peripheral Component Interface (PCI) bus. These computers provide a total of 50 watts of power for the three expansion slots. Both 5 volts and 3.3 V are suplied; the total power at both voltages must not exceed the 50 W maximum.

    The Power Macintosh 9500 has six PCI slots supported by two Bandit custom ICs: one for PCI slots 13 and the other for PCI slots 46. The computer provides a total of 90 W of power for the six expansion slots. Both 5 V and 3.3 V are supplied; the total power at both voltages must not exceed the 90-W maximum.

    The Power Macintosh 7200, 7500, 8500 and 9500 computers accept standard PCI cards as defined by the PCI Local Bus Specification, Revision 2.0. The cards are required to use the 5 V signaling standard and to use the standard ISA fence described in this specification.


    Article Change History:
    03 Jun 1996 - Modified to better facilitate searching.
    05 Jan 1996 - Corrected minor typo.



Document Information
Product Area: Computers
Category: Power Macintosh
Sub Category: General Topics

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