Video BIOS for a Sapphire HD7850 graphics card with 2 GB of memory, RAR archive of about 84 KB. The name lists a memory marking 4AMF, indicating it suits cards fitted with that specific VRAM type, which is important because a VBIOS for different memory chips can cause artifacts or no display. It is typically flashed to the card SPI chip with a programmer or a flashing utility. Save the original VBIOS first and check the memory chip markings on your card before writing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →