So, my hard drive was making a slight "grinding" noise, like it was being used constantly or something. I thought it was failing so I threw a new hard drive in there. That didn't change anything, the noise is still there. The sound was not occurring when I had my old CPU and motherboard. I bought a new Mobo (Asus z97-a) and a new CPU (4690k) last week as my mobo fried. Ever since, the noise has been there and it's very annoying. I'm completely stuck and have no idea what to do. Does anyone have any suggestions or solutions? Everything is appreciated.