If you check the tech specs at the Apple Store, it says the x1900 will work in any PowerMac G5 with PCIe Slots (i.e. only the PowerMacs introduced last fall! And, of course, the new Mac Pros.). All previous PM G5 had PCI-X slots for expansion and AGP slots for the graphics card.
So if you have a DualCore 2.0 or 2.3 or Quad 2.5 G5 from the last series of PowerMacs, it will work. In any other machine, it won't work.
Comments
The 2003 dual G5 has PCI-X slots. Isn't this ATI card a PCIe card?
Yes, it's PCIe
So if you have a DualCore 2.0 or 2.3 or Quad 2.5 G5 from the last series of PowerMacs, it will work. In any other machine, it won't work.