In addition the use of poor quality "Cooling Fan Manufacturer", in the production of this type of fan due to defects in workmanship, the center of gravity may not be in the fan axis, forming the "eccentric" and use over time, "Cooling Fan Manufacturer"and" eccentric "phenomenon will become more serious, it will not only produce noise, serious damage may CPU. In this regard, can be removed altogether, and then thread hanging from its center position, let it sink still to see which direction to put an end to sink in light grinding wheel a few times, then test, has been be "Cooling Fan Manufacturer" in a horizontal position and then later be able to install up to.