Bought a MB off ebay. It does not have a part number on the board. All it says is SOYO. I found this number. P4SX-2BA4. I need to find drivers for the on-board sound. It came with a P4 2.4 gig cpu, and set up fine with XP. I try to go to the Soyo website, and IE says it has a problem and has to close. The web site doesn't work. Does anyone know what sound chip is on this board? Thanks, gtoguy3. And, years ago, I never did get my 90.00 rebate from Soyo for buying a combo deal they had on Tiger Direct.