Fans Never Spin Any Faster IMac Overheating?

Mar 30, 2012

I have brought a new iMac 27'' the i5 model. I have noticed that the fans never change speed no matter how hot my processor gets ? Is this normal ? I have ran prime 95 and istat pro to check the temps and fan speeds. Nothing changes apart from the temperature.

Info:
iMac, Mac OS X (10.7.3)

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Over the past few weeks my blackbook has been shutting down more and more frequently from what I can only believe is overheating. I just checked my computer upon startup with SMC fan control - it starts up at about 70 C and at about 3500 RPM. Yet, after a few minutes, the fan immediately drops down to 1100 RPM or and fluctuates between 800-1400. I try to force the fans to spin with SMC Fan control, but nothing happens. I've looked all over the web and I can't find anything definitive. I know that macbooks tend to overheat. What can I do? I'm at college and I really need to find a fix for this as soon as possible.

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Info:
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Dec 2, 2010

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Info:
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Info:
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Information:
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Info:
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I just bought a brand new imac running 10.5.7 3.06 Intel Core 2 Duo 4 GB 1067 MHz DDR3 i downloaded Handbreak to rip some of my dvd's and put them on my external hard drive as soon as i open handbreak and start ripping a dvd, the fans in my computer start whirring away, pretty loudly i downloaded the istatnano widget to check my fan rpm's and temps

While Running Handbreak:
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