I just bought an HP touchsmart 420 which has beats audio, well, short story, good computer horrible audio, I just understood why people buy DACs, compared to my toshiba laptop the sound is very poor, very low frequencies are barely heard, i tried listening "limit to your love" by james blake which is the bassiest song i know and i almost couldnt hear the bass, with my laptop its just a lot of bass and make my ears tickle with my Beyers DT 770 pro 80s.
So i guess Ill have to buy an external DAC
unless someone tells me that i can fix it installing another sound driver or something like that.