If you're not having issues that are addressed by BIOS updates, it is advisable not to perform updates to it. If a BIOS update does not list performance updates, there is no reason to expect them. An improper BIOS update can torpedo an otherwise perfectly fine motherboard, unless it is equipped with a backup BIOS or you know the specific steps to restore a BIOS without display and are prepared with a restore disk.
Most driver CDs that come with motherboards and graphics cards are outdated before they even get put into the box to ship. You would be better off downloading drivers directly from the manufacturers of your devices.