BornAgainMac said:I didn't know that. Wow, that really sucks. I guess PCI-X on the older PowerMacs isn't going to be any better. PCI-X sounds like some experimental hack expansion that never caught on. The name probably scared off vendors from supporting it. "Universal PCI Plus" would be been a better name.
The PCI-X macs had AGP slots for the graphics card. You could buy 3rd party AGP cards though you still had to get Mac specific cards. You don't use PCI-X for graphics cards.
The PCIe PowerMacs DID have graphics cards available despite what the original poster wrote but AFAIK only from Apple. Go to the Apple store online and search for 6600 and you'll get the PCIe G5 card as an option. For the MacPro they've the X1900 and the Nvidia 7300 cards. You can't put MacPro cards in the G5s though.