Well the audio is SupremeFX which is ASUS's onboard audio, and I've heard It's much better than Realtek.
To be honest...it's just Realtek ALC1150 under a different name. Nothing wrong with it. Measures very well with good implementation and can sound just as good as thousand dollar dacs when not coloured. It's just that...it's still Realtek.
Where'd you find that?
All of the onboard dacs from the Supremefx line use that chip. In fact, pretty much all companies use that and put their own unique name on it to make their onboard implementation stand out. If it isn't that chip, they will let you know as it's important for marketing. Gigabyte is a prime example, even though the Creative chip they use is nothing special.
Another thing that gives it away is how they say there is a 112 dB snr. That's exactly the same as Realtek's ALC1150 in a perfect implementation without differential output.
It's really just marketing, same thing with expensive dacs. You can trace the components down if you know what to look for, but it doesn't matter much. As long as you are happy with the sound, you are good. : )