You should tax as many of the physical structures of your CPU as possible in order to do a complete job of burning-in. Hit as many of those PMOS and NMOS registers as possible. A little theory and the practice of burning in can be found here: http://people.freenet.de/s.urfer/conditioning.htm
Whilst watching your temperatures, raise your Vcore and lower your multiplier as much as possible. For best results, your reported temperatures should never exceed 45C.
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