The Computer completely stops. Power is still going into USB devices EG: Mice and keyboard BUT they do not respond for example if I press capslock the keyboard will not react. and the sound crashes and loops yes. It doesnt reboot it just .. stops and i have to hold the power button to turn it off. though SOMETIMES ive had it freeze then BSOD but that has happened Once or Twice. I am currently waiting for it to freeze again in order to check heat of ram etc as mentioned above but have not had much time to use my computer recently for it to do so.