Creative Sound Blaster X-Fi XtremeMusic 7.1 Channels 24-bit 96KHz PCI Interface Sound Card problems?

I have a creative Sound Blaster X-Fi XtremeMusic 7.1 Channels 24-bit 96KHz PCI Interface Sound Card, it worked fine until i got home from Christmas break-also after i installed a SATA harddrive (i didnt use the computer until the drive was in) but before I left the card worked fine, i tested the speakers on my tv and they were ok, when i turn the volume up it gives me a scratchy/static sound, my motherboard is made by biostar, I also get a very, very, very faint sound with my speakers turned all the way up...and my computer volume is all the way up too