In Company of Heroes, after the loading is done, it gets to a "Press Any key" screen. During this screen, there is a loud squealing noise coming from my PC, but I can't pinpoint what is making the noise. It also happens a lot during 3DMark05, especially in the CPU tests. After every frame, it would squeak. I'm sure there are more instances when this will occur but I've yet to encounter them. What the heck is this noise?