Second copy of a 16.0 MB password-unlocked BIOS dump for a 450 G4, in raw .bin form; the (2) suffix merely distinguishes it from the other file. The name provides no brand, board number or revision. The size corresponds to a 128 Mbit SPI chip, written with a programmer such as a CH341A or similar tool. Read the existing chip first, as it may hold the unit serial and other identity data, and confirm the hardware matches this model before writing and verifying.
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 @biosfilebins. 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 →