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HD7770 Looking Amd Radeon R7 250X Bios Fail


New Member
Aug 8, 2020
2 (0.04/day)
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


Last edited:
Oct 22, 2014
9,649 (4.44/day)
Sunshine Coast
System Name Black Box
Processor Intel i5-9600KF
Motherboard NZXT N7 Z370 Black
Cooling Cooler Master 240 RGB AIO / Stock
Memory Thermaltake Toughram 16GB 4400MHz DDR4 or Gigabyte 16GB 3600MHz DDR4 or Adata 8GB 2133Mhz DDR4
Video Card(s) Asus Dual 1060 6GB
Storage Kingston A2000 512Gb NVME
Display(s) AOC 24" Freesync 1m.s. 75Hz
Case Corsair 450D High Air Flow.
Audio Device(s) No need.
Power Supply FSP Aurum 650W
Mouse Yes
Keyboard Of course
Software W10 Pro 64 bit
English please.
Read this thread, or at least look at the pictures.