ASUS BIOS image for the P5GC-MX/1333 desktop motherboard, firmware version 0207, in ROM format at 512 KB. The 1333 suffix marks the board variant that supports a 1333 MHz front-side bus. A file of this size matches a 4 Mbit flash chip, so it can be written directly to the chip with a programmer or through the board's own update utility. Confirm that the board is the 1333 variant rather than the plain P5GC-MX. Save the current BIOS contents before flashing so you can roll back if needed.
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 .rom file
A BIOS image as shipped by the vendor (commonly AMI) — often the BIOS region only, without descriptor or ME.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →