http://www.youtube.com/watch?v=E5lOz6bWgyY
Basically it hangs for a few seconds, becomes very obvious if
there is sound.
And only happens on load.(doesnt happen in idle)
I did some tests:
Intel Burn Test 100%(RAM + Processor)
Using external speaker and monitor.
My laptop: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c02189593&jumpid=reg_R1002_USEN