Zipped BIOS firmware for the X55VDF variant, with 1409 in the name possibly indicating a firmware version, though that is not certain. No brand or board revision is stated. At 3.56 MB the archive should hold a full flash image, which is written to the SPI chip with an external programmer when the firmware is corrupt. Compare the image size with the chip capacity, check the board revision on your PCB, and back up the original contents before programming, so you can restore any unique data.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →