I have an Asus motherboard, and back when I was playing with Soundmax,
someone found a compatible driver on the Dell site. It was more
recent than the one Asus offered, and worked OK. But there is an
art to finding stuff like that, and it helps to know more about
the hardware, before beginning the search.
It isn't hard to find features like the graphic equalizer now,
because they are implemented in software. The hardware chip itself
is usually limited to analog to digital and digital to analog
conversion. Other features, like the graphics equalizer, are
added via digital signal processing done by the system processor.