We told you. . you can use GPU-Z to dump your original rom.
Dumping your rom is the VERY FIRST STEP.
I have a Sapphire Dual-X HD 7970 which is the same as the R9 280 X . . my DVI port works.
hello sir, thank you for your message, but you were talking about the thing doesn't concern my question nor my problem, i did the dumping my cards' own rom from the beginning, and i always did flash with these roms, my problem is even though, the up dvi still dead in mac and pc, i dont have 7970 but i've tried my 280X 7950, non of them has the up dvi works, i've tried to flash the rom2 but always has errors while flashing, but when i start to flash the rom1 for mac efi, the error disappeared and flash like normal as the picture given by member here, but still dont have last dvi work, i was trying to find the raison and a solution to it. and people here said that because i have double roms on my card, but every 280x has double roms right, so what i need to do? maybe i need to find the old topic which has a solution on it, but i've cherchered for days, nothing useful found for now, can you help please? thank you