BIOS file for the Phitronics P7I45GC-M+ motherboard, zipped to 429 KB, with no version or revision given in the name. The model code hints at an Intel 945GC chipset board, though the archive contents should confirm that. A dump of this size fits a small 4 Mbit flash chip, which can be written with a common USB programmer. Read and keep the existing firmware before overwriting, check that the PCB marking matches P7I45GC-M+, and verify the image size equals the chip capacity.
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 →