"220V Cooling Fan" Turn the fan bearing parts while the temperature rises, the lubricant starts to work, then boot the noise situation will return to normal state. This usually occurs in a few minutes just getting machine. Noise will not appear in the other seasons in this case. "220V Cooling Fan" Bearing in oil: If you have been louder, the fan needs to refuel. In the center of the bottom of the fan has a circular sticker, you can see the fans kick inside the shaft. With a toothpick dipped in a little sewing machine oil (about the size of a grain of rice) can be added to the list. Then the sticker affixed. Including the cpu fan, graphics card fan, power supply "220V Cooling Fan" can refuel. If you do not understand can go to a computer repair shop refueling allow professionals to get.