Hello I purchased an Intel P4 3.2 used and put it in a new motherboard, the brand new Intel Heatsink and fan is running at 2700RPM and I find the CPU giving off alot of heat, I have been told by a local Computer shop that this CPU was overclocked and there is no reversing it. He claims Microsoft got tired of replacing CPU's under warranty so they added this feature to the P4's, is this true?