BIOS image in a RAR archive labelled X99-P4 with HM55, a combination typical of inexpensive Chinese-market boards that pair a mobile Intel HM55 chipset with a desktop form factor. No manufacturer or version appears in the name, so compare the board markings carefully before writing. Flash it with an SPI programmer such as a CH341A to recover a board that no longer posts, after first reading and saving the original chip contents and confirming that the image size equals the chip size.
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 →