So, my SP3's fan started emitting a noise that sounds suspiciously like the bearings are going out. Notice it the first time about an hour ago while watch a movie on TV; the SP3 was sitting there, the fan started up, and I heard a high-pitched whine that I'd never heard before. So far, it only happens at lower RPMs. Anybody else experienced this? I'm resetting mine after I write this to prepare it for a quick trip to the Microsoft Store for a swap. This will be my second swap; first one was for audio popping through the headphone that this one doesn't suffer from. I'm hoping the new unit doesn't have that or a different issue. Anything beyond two swaps and I'll start getting frustrated.