Firmware for the HP Pavilion Desktop 500 and 550 series, made for the IPM87-MP motherboard, an H87-class board going by its name. The 6.43 MB RAR is a BIOS image for reprogramming the board's SPI flash when POST fails or a flash was interrupted. Desktop boards often have a socketed or SOIC-8 chip that a clip and programmer can reach. Save the current contents first so the serial and product data are not lost, and confirm the board label reads IPM87-MP before writing anything.
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 →