Yes, upgrade that PCI-Express based Power Mac you have with a great video card option.
Card is in perfect working order, pulled from a G5 Quad system a bit over a year ago. It is a great card and just as powerful as the Quadro FX4500 card. We swapped this card out for the Quadro so that we could drive dual 30" displays on the G5 workstation.
Card is PCI-e X16, nVidia GeForce 7800GT w/256MB
1 x DVI Dual-Link
1 x DVI-I
If interested please PM me or email me at: Jeff at AppliedVisual dot com