Working BIOS dump for a board identified as Q45T-AM, revision 1.1, inside a 1.89 MB RAR archive. The name states a 4 MB image, so it is meant for a 32 Mbit SPI flash chip, and a chip of a different capacity will not accept it unchanged. The brand is not given, so identify the board by the model and revision printed on the PCB before using this file. Program it with an SPI programmer such as a CH341A or RT809, and keep a full read of the original chip so you can restore it 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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →