To the maxims of "the higher the OC, the shorter the duration" and "the higher the OC, the greater the need for cooling" add the one of "there are heatsinks stuck to the micro with chewing gum (1) and if they come off BUM!, they turn into chocapic" ;D

(1) Read that the thermal paste in low-end products is so bad that it disintegrates with the same heat.