BIOS image for the Dell OptiPlex 3020 mini tower, board MIH81R Tigris MT, Wistron number 12124-2, in a 4.45 MB ZIP. Wistron board numbers take a five-digit code plus a revision digit, and the MIH81R tag points to an H81 chipset desktop board. The dump is used to restore a system that will not post or shows a corrupted BIOS, by writing the SPI flash with a programmer. Read and keep the original chip contents, which hold the service tag, and confirm the image size matches the chip.
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 →