I tried booting off the Leopard install disk-it worked but gave me a badly distorted grayscale screen(like what I got with the 9600 PC&Mac before installing the drivers) and locked up as soon as I tried to do anything.
I stuck a GEForce 4MX in the AGP slot and booted the computer to 10.5.8(off the hard drive) just fine. I spent some time scouring the internet and found a set of X800 drivers for 10.3 and later, so tried installing those. It still hangs at the Apple with 10.5.8. This particular computer only has 10.2 and 10.5-I may stick another HDD in it(Lord knows I have enough lying around) and installing 10.4 on it.
I have another MDD around here that has every version of OS X from 10.2 to 10.5 installed on it, so I may try the card in that one.
Real fun reading this thread. The "taping the 3 & 11 pins" guide was mostly written by myself, the pictures taken on my back porch.
Really happy to see that my little experiments with X3 so long ago are still leading to useable cards. I am fairly certain that first time I did it was on a QS, but the early model, not 2002. But I also recall that it would go several boots sometimes and not work.
It ended up being a fair compromise, the X3 would work in a MDD but was trouble in QS while the 6800 cards worked in a QS but not a MDD. In my dream world I would still do PPC cards. There is much knowledge that seems to have been lost.
We had wonderful working roms for 6600GT cards. Some supported Dual Link DVI. There is a Quadro card that flashes into an awesome 6800 that has the Dual Link chip and thus runs a 30" display, like the Apple G5 card. But that one required a mod of some sort that I can't recall.
I guess one reason the 6800 and 6600 flashes aren't very popular is they required EEPROM swaps.
The really wonderful card was the 7800GS. I was especially proud of that one.
But if you go digging at Strangedogs pro-board you could likely find the posts where I first flashed the X3. I was quite nervous as it was like $800 at the time and we had no way of knowing what was going to happen.
From memory I seem to recall that the X3 has lower clocks than the Mac X800 and some cards needed their clocks lowered to be stable. I don't recall what rom got posted. Ideally you would use the full size one instead of reduced.
FWIW, many of the issues you are describing were found back then. I'm pretty sure when I did the first X3 I documented that booting in my QS was sporadic, it was happier in the Dual 2.0 G5 I got later.
Have you guys dug through old Barefeats articles? When I was creating these cards (with help from T Perrier (did 9800 256 meg) and A. Itra (6200 and 6600 and 6800 cards) I would have them tested at Barefeats.
My dad still has one of the Uber-rare Gainward 7800GT AGP cards in his basement in my ancient G5. Pity we never got the full 512 Megs to show up, always told myself I'd go back and figure out but maybe it isn't doable.
But you guys should dig at Strangedogs, many of these things you are finding were found before.