Zipped BIOS or firmware binary named simply 8, offering no information on the device, board or version. The archive is about 2 MB, and the number may hint at an 8 MB flash image that compresses well, though that is not certain. Once extracted, check the image size against the flash chip on your board and look inside with a hex editor or UEFITool for identifying strings. Always read and keep a backup of the original chip contents before programming anything from an unidentified source.
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 @vinafix_bios. 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 →