Really? I thought there was one, oh well thanks. But here is one for you, break in period for a car is 500 miles, what is it for a car computer? BA DUM CHA! Im not funny...
horndude, they DO have a break in period, yeesh, it's mainly only in considering overclocking period not to mention like chris said AS5 does have a period of 200 hours or so until it reaches its final stage of 'goopness'