Hi,

because I just receive my "new" pet - MDD with 9000 Pro card, I am solving the same problem.

So far best solution I found ( but not realized yet ) is to buy FireGL X3 and flash it with ATI reduced PPC ROM. This card is one from most powerful and cheap for AGP x4 Powermac.

Fastest compatible is X850 XT, but there is no reduced ROM, it means you have to try to reduce it yourself, or solder new 128 MB ROM on graphics card and use Original ATI PPC ROM.

You will find this ROMs and necessary pin modifications here.

P.S. and I don't know, if this flashed cards are working with MorphOS, but probably yes - maybe here is some user who can confirm this?