The first CPU I ever killed

A 'Classic' Athlon Thunderbird @1GHz running on a 100MHz Front Side Bus. My first 1GHz part, it powered my main machine for a year. One fateful day I tried the pencil trick on the bridges and decided that placing the heatsink/fan on top of the processor would be enough to cool the core rather than locking it down.

Needless to say it's dead, though not forgotten.