Help flashing Sapphire rx480 4gb

Hi guys, im tryigng to flash the bios of my Sapphire RX480 4GB Nitro on windows 8.1.
Its the one with 130/7500 clock
I used some roms that i found here but, always the resoult is: after restarting my pc , it wont recognice my graphic card, and i need to flash it to the original version again .

Any tips? Or rom for exactly this vga.
Thanks in advance.