well with your system spec i cant see it being the proccesor not handling it!!

to be honest i have never used a sound card!!

ive never personally thought i need one the on board audio does the job i need it to, i have a sound card but never tried using it lol, i just have it sitting around but im going to try use it because my onboard audio doesnt work on this board,

so i cant tell you for sure what would be better maybe someone else can

or just look at the spec of the two and find out yourself,

sorry i cant help with this.