ASUS GeForce RTX 3080 graphics card VBIOS, 10240 MB memory variant per the 10240 token, with 210520 likely a build date code. The name does not specify the exact card series or board revision. VBIOS images are used to recover a card after a failed flash, either with NVFlash or by writing the SPI EEPROM directly with a programmer. Back up the original firmware, make sure the memory size and card model match, and check that the image fits the EEPROM 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 .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 →