BIOS package for the Gigabyte GA-990FXA-UD3 desktop motherboard, revision 4.0, compressed as an 8.33 MB RAR archive. Gigabyte prints the revision on the PCB, often near the PCIe slots, and firmware differs between revisions, so check it first. Many Gigabyte boards of this class use dual BIOS chips, and the image can be written to a corrupted SPI chip with an external programmer. Back up the existing contents first, and check that the file size matches the chip capacity before flashing.
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 →