I just recieved my PC today so I decided to at least start it up. It makes this slight grinding noise? I'm a newbie when it comes to PCs and I wanted to know if the PC is supposed to sound a little noisy, or is it just supposed to make a humming noise. It's hard to explain and it's probably harder to understand what I'm talking about. When you listen to the hummmm or weeeeee of the motor, you can here this grgrgrgrgrgrgrgr noise at the same time the noise is not constant but intermitent. It's not a serious sound and maybe I'm being too picky but usaully power tools don't make a slight grinding noise when there brand new. I used the PC with both backing plate and no backing plate and there's no sound difference. Hope you like my sound effects and thanks! i hope I don't have to ship it back I waited a week for it to arrive from Autopia.