I'm proposing to this forum to make ATi HD4670 AGP work for PPC G5 The GPU is in the iMac if I recall so I think on that basis is should not bee impossible . I think DX10 has to come to our Old G5'vs ... that we all love ... before the "Intel Empire " era.... Can it be done? if not why not? IT's easier whit HD 3850 AGP ? I'm hoping a full cooperation with the forum on this matter ... What part of the bios do you need to edit in order to boot/work whit the G5 ? I also tried mounting a Wildcat on my G5 , but no boot I have a dual gpu wildcat AGP PRO .... dose not work... so interesting.