When i boot my system, the system fan sounds like an engine. If the environment is damn silent, then the fan sound hears more. what will be the problem? can anyone help me to rectify it?
When your system starts,all the fans will run at max speed for a second. If your fan is making noise all the time maybe you should think about changing it.
Look into: Scythe, Noctua, or SilenX. The first few seconds all fans will spin at full, but it also depends on the size of the fan. If you can mount a 120mm fan, do it. They push more air, and spin quieter.