BIOS image for the ASUS X551MA at board revision 2.0, read from a Winbond 25Q64FW flash chip, 8.00 MB in size. The 25Q64FW is a 64 Mbit part running at 1.8 V, so a programmer used with it needs a 1.8 V adapter to avoid damaging the chip. Match the revision printed on the PCB before writing, since other revisions may need different firmware. Dump and keep the original contents first, and expect the image to hold donor-specific data such as serial numbers.
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 @bios_laptop. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →