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PCI Expansion Slots

The Power Macintosh G3 computer includes four PCI expansion slots. Three of the slots, slots B, C, and D (2, 3, and 4), are 5 V, 64-bit, 33 MHz slots that support both 32-bit and 64-bit PCI cards that are compliant with the PCI V2.1 specification.   The other slot, slot A (1), is a 3.3 V, 32-bit, 66 MHz slot dedicated to a 2D/3D accelerated graphics card.

The 66 MHz PCI slot conforms to the PCI V2.1 specification with the exception that its clock speed is fixed at 66 MHz, so it does not accept 33 MHz cards. The 66 MHz PCI slot is keyed for 3.3 V only operation. Older 5 V cards cannot be installed in the 66 MHz PCI slot.

For more information, see PCI Expansion Slots .