I'll just say one thing. If you want to overclock big, then you are going to have to spend big bucks on a water cooling kit. If you want to go insane, go with a peltier water cooling setup. Do lots of research if you go peltier. Well actually, do lots of research period. But no matter how you slice the bread, you are going to have to spend around 200-300 bucks for a good water cooling kit to get 4ghz safely. If you don't care about saftey... well... dont post on this forum.