I suffer overheat problem before, my water cooling pump connector loosen and cause the pump stop function, my pc turn to blue screen and i continue press reset button until my pc can't boot any more then i noticed...the tube connected to the water block become so soft(melted), the cpu temp approximate 90-100C(the main point is i OC my P4 Prescott 3.0Ghz)...luckily the processor is "rock solid", still working now...but the fan speed controller chip fail after that event( i am using asus board, Q-fan can't auto adjust fan speed anymore), probably burned by the heat....