When the PC is situated in a calm atmosphere of your home, its noise parameters are of really great importance. All sorts of crackling and whistling sounds have especially irritating effect in the quiet evening (night) hours, when all sources of home noise, except you, are sleeping. The only exception here may be the hardcore game lovers when you notice not only no noise, but completely nothing around you while absorbed into a game. However, some members of your family may get really upset with the noise you and your PC produce.

One of the major noise sources is a fan of the power supply unit. The folk remedy advises to solder the earth wire of the cooler (the black one) so that the output were +5V (where the red wires come from), and the fan rotation speed will slow down creating “quieter” air flow. It is absolutely correct. In case of normal power voltage of 12V the difference between +12V and +5V makes 7V. Lower voltage will reduce the fan rotation speed and the acoustic noises generated by the fan blades.

Globefan Technology Company decided to take care of those of you who like quiet PCs but do not work that much with a soldering iron. This Taiwanese company released the today’s quietest cooler for PSUs. DSF-80UL-25 fan rotates at only 1000rpm. It creates only 15dB of noise (while the regular coolers generate between 40dB and 60dB). The new fan requires the same standard 12V power supply. The developers claim that its has been designed specifically for low-speed rotations, so that the mass pieces should not suffer from such drawbacks as power supply reduction, engine slow-down, etc. This exclusive stuff costs only $12.