So every now and then, I get this really strange noise coming from my computer. It occurs about once every 10 minutes, doesn't seem to affect the computers performance, but its a very strange noise that Id like to know about. The noise itself is a bit difficult to explain, its very metal-ey, kind of grindey but its not grinding at the same time. Almost sounds electrical, like there's no mechanical interference but a noise coming from the speakers. Its a very metallic beep is the best I could put it I guess, is it my harddrive in its final days, is it my GPU, is it the fans? Thanks