8.00 MB raw BIN flash image listed for the K451L and S451, an Intel Core i5 version on motherboard revision 2.0, and marked OK, meaning it was reported working.

ASUS S451 BIOS image for board revision 2.0, read from a 25Q64 flash chip, delivered as a 3.25 MB RAR.

ASUS K451LN / S451LN BIOS firmware for mainboard revision 2.0, supplied as a 3.25 MB RAR.

Working BIOS for the ASUS K451L and S451 laptop motherboard, revision 2.0, without a CPU or GPU variant mentioned in the name.

BIOS firmware archive for the ASUS K451L notebook, which shares its mainboard with the S451 series, labelled for the Core i5 configuration and board revision 2.0.

BIOS archive for the ASUS K451L laptop with an Intel Core i5, also covering the S451 variant, for main board revision 2.0.

Tested working BIOS for the ASUS S451 laptop, motherboard revision 2.0, intended for a 25Q64 flash chip, a 64 Mbit or 8 MB SPI part.

RAR archive of BIOS firmware for the S451LB, a VivoBook S451 variant, though the name gives no brand, version or board revision.

Fully working BIOS for the ASUS K451L and S451 laptop board, revision 2.0, matching a build with an Intel Core i7-4500U and an Nvidia N14P-GV2-S-A1 graphics chip.

BIOS firmware archive for the S451LN, with 305 in the name most likely being the BIOS version, though that is not certain. No brand or board revision is given.

BIOS image for ASUS K451L and S451 laptops with the onboard memory disabled, so the board runs from an installed SO-DIMM.