theoretically you could put an 8800gt in a power mac g5 2.0 so since im guessing some one has tryed putting an 8800gt in one does it work at all (gray boot screen) ?if not the problem is probla bly the firmware or rom if it does get the boot screen and fails to start osx then its the kext (means that apple never made a n nvidia8000series kext for power pc in that case i will have to make one) so does any one want to try for the sake of my old g5 so it doesnt get tossed ?