ST4RCUTTER,
You beat me to it. I was going to suggest some special C4 thermal compound.
eLiu,
The other thing to consider when beating that CPU like a rented mule is the core voltage. If you increase the voltage too far over stock, then you risk frying the CPU. A good rule of thumb for increasing voltage is no more than 10-15% with out significantly improved cooling. Remember to increase your FSB and vcore in SMALL steps, the CPU, RAM, motherboard, etc will usually give you a sign when you have reach your overclocking limit. But push it too far too quickly and that sign could be smoke. BTW, Intel CPU's have a built in thermal protection circuit which shuts the processor off if it gets too hot, AMD does not include this circuit in their CPU's.