Wait for your system to check current bios information. step. insert your floppy or usb with the new bios file. step. select the drive letter with the bios update file, then select the file. step. wait for your system to check the update file. step. after the file check is finished, click "yes" to update your bios.. This quick tutorial shows how to flash your firmware (update bios) using any modern asus board. we used an asus crosshair v in this guide, but the steps apply to any other e-z flash-equipped board.. Geforce