I recently purchased a 2.3 GHz i7 Retina Macbook Pro 15", I bought the High End model with the GPU so that I could do some gaming, but when I begin gaming (in this case Portal 2) my machine gets quite hot. Now I expect this as I have heard that this is a frequent occurrence, but I would expect the fans to at least spin up to try and cool the system, and despite the chassis becoming really quite hot, I can't hear the fans spinning up at all, from what I've heard you should be able to hear them during gaming so as to keep the system well ventilated. I have sat in a silent room with no sound and played and I still cannot hear anything, and after 10 minutes the bottom of the computer is hot as well as the areas near the WASD keys. Should I be concerned that my fans aren't working, or is this normal? I just want to know whether I need to be concerned as high temperatures can shorten the life span of the components, thanks in advance for any help you guys can provide.