I just found out about this. I found a bunch of threads all over the internet explaining how to install Creative X-Fi bundled software to be used with a Realtek on board HDA. People who did this report significant improvement in sound quality. I decided to try this mod and found it to be true. I have experienced improvement in quality, plus the audio output became much louder.
Here is the link to the thread where I found the most up to date modded drivers.
Here are some more threads I found on the topic:
http://www.techpowerup.com/forums/showthread.php?t=87523
http://www.hardwareheaven.com/pax-drivers/209050-realtek-soundmax-modds-sb-x-fi-mb-1-2-a.html
http://www.hardwareheaven.com/pax-drivers/200995-realtek-hd-x-fi-mb-windows-7-2-48-out.html
If anyone is willing to put it to the test, I'll be more than glad to read about your experience with this mod.














