You're right to look for an alternate sound card. The noise is caused by other circuitry in the pc interfering with the sensitive parts of the audio electronics.
So I guess you should have looked for a free slot before buying a card. Can't you take it back to the store and change it for a USB one ?
Hi, my desktop speakers produce a background scratch/static when the my computer
is processing(?) and even more noticeably when I drag the mouse pointer.
I have replaced the speakers so I know that is not the problem. My
sound source is on-board. I bought a new sound card but could not find an
available slot to install it. Help?<div style="overflow: hidden; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); text-align: left; text-decoration: none; border: medium none;">