Do i7's use more power / create more heat than i5's when idle?

Discussion in 'iMac' started by Whackintosh, Feb 25, 2013.

  1. Whackintosh macrumors 6502


    Mar 8, 2009
    Montreal, Quebec
    I'll rarely need the extra horsepower of an i7, but I just might go for it. I know they run slightly hotter and use more power than i5 processors do when pushed to their limits, but do they consume more energy when idle (or not pushed to their fullest)?
  2. WilliamG macrumors G3

    Mar 29, 2008
    Probably negligibly.
  3. Hexley macrumors 6502a

    Jun 10, 2009
    If you can afford an Core i7 then the power cost to you is negligible.

    My Core i7 is not running at 48C while playing a flash video.
  4. Gav2k macrumors G3


    Jul 24, 2009
    Without load 1-3 watts

    With load 20 depending on the task.
  5. Mac32 Suspended

    Nov 20, 2010
    They will not use more power when idle, but they'll run hotter/use more power when running intensive tasks. The i7 CPU has a higher boost frequency, and the additional HT threads also creates more heat. How much is very hard to say, a few celsius for certain. You could check with some overclocking forums. Overclockers tend to disable HT for higher overclocks.

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