Archive of about 2.9 MB labeled Diachi H81, apparently for an H81 chipset desktop motherboard sold under the Diachi name; no model suffix or revision is given.

Compressed BIOS image for an H81 motherboard labelled Diachi, which points to an Intel H81 chipset board for Haswell LGA1150 processors.

BIOS firmware for a Diachi H81 board, with the name adding the identifier G355Q and what appears to be version 1.11.