BIOS firmware version 2503 for the ASUS ROG Maximus X Hero desktop motherboard, delivered in a 10.4 MB zip archive. No flash chip type is given in the name, so read the marking on the chip on your board before programming. A technician would write this image with a CH341A or similar programmer to recover a board that will not post, or to restore firmware after a bad flash. Back up the original contents first, since they contain board-specific data, and check that the image size matches the chip.
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 →