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- 27" iMac 2.7GHz Core i5, iPhone 6, iPad Air 2, 4th gen Apple TV
Sometimes my fan will race to about 4,000 rpm. I got fan control and set the parameters to temp 50/80 and fan speed to 2,000 rpm. But my fan will still fly up to 4,000 rpm when the temp is only around 60. Is this normal or do I need some kind of control update?