[SOLVED] Help with flashing RX480 into a 580

I own a Sapphire Nitro+ RX480 8GB GDDR5. I repasted the card and the temperatures are good. 60s in GTA5.
Full specs are in my signature!

I would like to upgrade this card to a 580 for some more performance. I already downloaded a Sapphire Pulse 580 bios since low clocked for a 580, but still an improvement and it should work besyon my 480.

I am using ATIwinflash, but it can't find my card, even though the card works fine. Neither the command line nor the windows version works. Both spit this error:
View: https://imgur.com/sstRgfQ

AMDVbiosflash sees the card, but it throws an ssid error when I try to flash.
View: https://imgur.com/uim0Nmm


How to fix this?
 
Don't spam the forum stick to 1 thread
Hello, i flashed my sapphire nitro+ oc 480 into a 580 using amdvbios flasher and when it booted no program could see the gpu, even though windows was running off of it.

I tried again, and was greeted with a no boot.

I flipped my dual bios switch and the card booted right up, however how do i fix the side with the bad bios?
 

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