There are two main sources, depending on whether your board is a standalone MSI product or an HP OEM board.
Turn off your computer, unplug it, and open the case. Look directly on the surface of the motherboard. You will see white silkscreened text: ms 7613 ver 11 bios update
HP internally codenamed this motherboard Iona-GL8E. When searching HP’s support site, use this codename rather than "MS-7613". There are two main sources, depending on whether