...the reason is you´re trying to drive an Porsche with an "Beetle" Engine on an racetrack, by wondering: "Mhmm 60mph is´nt really fast is´nt it ???"
...mind the problem...???
The problems with dropouts with the so called "onboard" soundchips could cause by so many problems with your system configuration, software and driver problems, that we´re still post new "how to fix"´s until new years eve...
And when 100$ are a point of "to expensive for the moment"....try to get a 15$ card with PCIe...I´m sure this card will solve your drop-out problems.