Ok guys. I got this beast yesterday. I installed OWC-ram and Samsung F1. Everything´s fine, except the resonating every 5 seconds and, of course, the booting after waking up. I think that the resonation comes from the PSU, not for sure. It´s very irritating. What can I do? I don´t want to open that PSU by myself because that´ll avoid the warranty. Need to call Apple? The box really was taking hits, it was far from nice, but I can´t believe that the computer can take hits, because it is so well packed inside. Well, any other have this resonation-problem?