HD7770 Looking Amd Radeon R7 250X Bios Fail

[cengizsamed]

Hi, everybody.sorry about my bad English.I have the video card in the photo.I had to change the bios to sell it.I downloaded the BIOS from the link then the screen was black.when I try to install bios from dos, I get the adapter not found error.I also tried the unlockrom-x code.I don't know about the 1+8 pin experiment.please help me.
Black screen bios : https://www.techpowerup.com/vgabios/133419/sapphire-hd7770-1024-121127
Original bios : https://www.techpowerup.com/vgabios/153403/sapphire-hd7770-1024-130328

 

[Caring1]

English please.
Read this thread, or at least look at the pictures.

How to recover from a bad video BIOS flash

Almost every day there are new threads regarding bricked graphics cards due to wrong BIOS flashing, and since eidairaman1 is no longer around to help, here is a guide how to deal with a bad VGA BIOS flash. Find the correct BIOS First off, you'll have to find a copy of the original BIOS. In case...

www.techpowerup.com

 

[cengizsamed]

I solved the problem by trying on my different computer