Have an Athlon 6400+ with a cheap Foxconn mobo, running XP MCE. When I open up an application, or start to do something processor intensive (opening a video, tabs, etc) the audio (if I'm watching a video) will jitter and then catch up, as well as the CPU fan spools up. I figured this might be Queit n Cool, but it's disabled in the bios so I don't think it's the culprit. Are there any other things I should try? This is the first AMD box I've worked on. I've checked to make sure the CPU isn't throttling down to 800mhz (like QnC does), it stays at 2.2 all the time.