I would recommend getting a cheap sound card this is the one I use
Creative Audigy SE
$33
http://www.newegg.com/Product/Produc...82E16829102012
I think OCZ PSU's are ok so thats not it
try updating your Directx 9
http://www.microsoft.com/downloads/d...displaylang=en
what driver version for the graphic card driver are you using?
download coretemp to see the CPU's temperatures.
http://www.alcpu.com/CoreTemp/
download GPU-Z to see the graphic card temp
http://www.filehippo.com/download_gpuz/
whats your screen refresh rate?
60hz? 75hz?