Like my title says my new 27" iMac's CPU fan I believe (the one on the left) won't turn off when I shut down the computer. Now on to the clarification, the fans do not run loud. My CPU fan is at a constant 995 to 998 rpm no matter what I am doing. It's completely silent. The whole computer. BUT, when I turn the computer off and put my ear to the exhaust vent I can hear the motor turning. Unless it's something else clicking. But I am 95% sure it's the sound of a motor turning. Now to the question. Is this normal? For the fan to continue to run albeit completely silent even after a complete shutdown and cool down?