PC boot problems after the beep

Users questions:After booting the computer most of the sound obvious than before. I do not know what causes it? What's the solution? Hope to answer about which friends can help. Thank you!
Experts answer: dust causes the computer is turned on, the noise increasing, particularly in higher CPU occupation, or large game requires a strongGraphics support. Computer with a period of time should be given except dust. CPU fan dusty, relative rotation will be high, it sounds loud, graphics support, high rpm, but also ring. As the fans more than dust, resulting in reduced frequency automatic cpu, video card power can be decreased. After the dust cleared, the situation will get better!
  • This information provided by the users.Thanks!