Hi guys, Im a bit concerned about my 15" rMBP. I've noticed it getting hot when watching fullscreen video and catch up tv etc, i check the temps and sometimes the GPU temps are getting up towards 70c. The thing is, the fans are still at a really low speed (2000rpm), if its getting hot shouldn't the fans be coming on to cool it down? Im a bit worried there's a fault somewhere and the fans aren't spinning up to compensate. I did do an SMC resent after the 10.8.3 update just to ensure everything was working ok. Should i be worried?