So if my pc has been idle for while, then on first start up it makes a loud grinding noise. At first i thought it was because my CPU fan was plugged into pwrfan header instead of cpufan. Switching this did make my unit a lot quieter but it still makes the loud noise on an idle start up. The weird thing is that it will continue to make the noise until i restart, i can restart it immediately or wait 10 mins, either way it fixes itself afterwards. Any suggestions? Thanks