too bad you didn't bother to state what hardware on the motherboard your needing a driver for. MB's do require several drivers, (ie: sound, video, lan, modem, chipset, and bios updates) depending on what exact hardware is onboard. And motherboards come in different board revision levels, ie: rev 1.0, rev 2.0, rev 3.0, etc. Each may require a different driver depending on what changes the manufacturer made to the board.
Please be specific with your request and your motherboard or just visit the Asus website(s) to see what drivers are available for your Asus (unknown revision) motherboard.
http://www.ecsusa.com/downloads/drivers_k7s.html