noise 問題, USB Header VS USB back plate

入左隻2手creative usb x-fi, fully functional

但同一set amp. and speaker,

asrock mb h77m-itx play back, 試哂所有back plate
usb ports都有電流聲, noise之類雜聲.

hp n54l server仔, 插邊個port都無事, 好清, 好正常.

想問如用m/b usb header再駁usb sound card,
電流聲會否消失?

部pc裸跑中.

thank you for your answer.

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