Hi,
I have this beautiful machine Powermac 3,6 / G4 1.42 DP.
It has AGP x4 slot.

I have here FireGL X3-256 card which can be flashed to MAC X800 XT Mac edition. Such card works with OS X and probably with MorphOS too.

But AGP cards like X1950 or HD 4670 are more powerful and hardware compatible with Powermac AGP slot. Not compatible with Open firmware and MacOSX, but compatible with MorphOS.

If I will have MorphOS installed, are X1900 or HD xxx cards boots "blindly" without OF output to MorphOS ?
I found here that G5 can do it, but find no info about G4.