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Activity Monitor says imovie using over 100% CPU?

D

Drewski

macrumors regular
Original poster
Jan 6, 2011
161
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Somewhere else
As my 2011 2.7 GHz i5 iMac with 12 GB RAM is optimizing and importing video, I checked the activity monitor and saw up to 130% in the %CPU column. What? I don't understand. FWIW, the CPU is only running at ~ 120°F so it's hardly breaking a sweat. Any ideas?

usage_zps3efc9fe6.jpg
 
Aluminum iMacs have very good cooling, that's why their fans rarely rev up. The CPU is at that because it is using 100% of a single core's worth of power and an additional 30% of another core's power.
 
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