Firmware dump for an ASUS X455LJ mainboard, revision 2.1, from a configuration fitted with a Core i5-5200 processor and a GeForce GT940 discrete graphics chip. The 3.27 MB RAR should hold the SPI flash image read from that board. Since X455 boards came in integrated and discrete versions, choosing a dump that matches the CPU and GPU fitted matters. Check the revision silkscreened on the PCB, read and save the existing chip first, then program the image with a CH341A or similar tool and confirm the file size matches the flash.
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 →