Hello. I got my iMac about four days ago. and always when I feel it it's very very hot. Even when I'm just browsing the internet. For example, Currently only Adium and Google Chrome are open and the temperatures by iStat are: HD 49C CPU 49C Ambient 37C GPU Diode 58C Power Supply 67C Is it fine? and if not, what can I do? ( the iMac isn't blocked on the behind of it, so it can't be the reason ). Thank you very much!