I have an old PC we want to use just to watch videos. It is an HP Pavilion a744x on an ASUS A7N8X-LA motherboard. I have 4 gigs of PC3200 ram and am running Windows XP-SP3. The onboard sound is very bad and scratchy and I've tried updating the drivers but that doesn't help. I'd like to buy a PCI sound card (I have 3 PCI slots - NOT PCI-e). I need to know what sound card would work, either from ebay or Amazon, as I've tried one and the computer did not recognize it. Any help would be appreciated.