In this day and age, requiring a CPU to flash the motherboard so you can use a newer CPU is just silly.
They really, really need to find a way to make the motherboard flash-able with only the 24-pin power connector plugged in. E.g. you plug in a USB drive where the BIOS file has to be placed in the root directory - the motherboard finds it and loads it with the help of a single microchip (just to get the flashing process working), ta-da! Done. Put in new CPU, good to go.