Apple powermac g3 blue.white Service Manual
Basics
Peripheral Component Interconnect (PCI) - 19
Peripheral Component Interconnect
(PCI)
(PCI)
The Power Macintosh G3 computer includes four PCI
expansion slots. Three of the slots are 5V, 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, is a
3.3V, 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.
The 3.3 V 66 MHz PCI graphics card that comes installed in
the 66 MHz PCI slot cannot be used in a 33 MHz PCI slot.