I have an ati 5770 card that was working in a mac pro. Then the mac pro stopped recognizing it. I tried it in a pc and it worked fine. I used atiwinflash to backup the card rom and tried to reflash the bios with a mac 5770 rom from netkas and now the ati card is not recognized by a mac or pc. Is there a way to get this card working again? Is there something I can try on a mac or pc to unbrick the card?