Ves :
Msi has been saying that their motherboard has this 'Audio Boost' technology which makes the onboard audio very high quality.
I've been skeptical of their marketing and have been wondering if the Asus Xonar DGX would be worth the buy for my build when compared to the quality of the onboard audio.
Thats a 100 dB SNR card .. it is a very low card and not even shielded .. dont buy any card lower than 115 SNR , it is not worth the cash ... The Asrock Extreme 6 /ac has 115db SNR audio and 600 ohm amp . by the way , every 3 db SNR means DOUBLE SOUND QUALITY ..
http://www.asrock.com/mb/Intel/Z87%20Extreme6ac/
so if you thin 100 is near 115 , you are mistaken , the 115 is 10 Times better ...
If you want to buy a real sound card , get the Creative sound blaster Z , or Asus Phoebus solo
this Asus : http://www.asus.com/Sound_Cards_and_DigitaltoAnalog_Converters/ROG_Xonar_Phoebus_Solo/
or this soundblaster :
http://www.soundblaster.com/products/sound-blaster-z.aspx
if you dont go for such Cards , dont bother and stay with onboard sound.
lol if you want to go crazy there are 124 DB sound cards , like the ZXR , but are very expensive
have a nice day