I recently bought a refirb iMac 3.06Ghz from the Apple store. Mine seems to be getting a little warm. I have seen as high as 191 F when using handbrake. (I had ISTAT pro preinstalled when I got it) When I use handbrake for a while The CPU temp will frequently stay around the mid to upper 180sF. Fan speed will be around 1200-1500 at these temps. Is that normal?