Shouldn't the 20 inch 2.4GHz iMac be faster than the 2.4GHz 24 inch iMac?

Discussion in 'iMac' started by docprego, Aug 29, 2007.

  1. docprego macrumors 65816

    Jun 12, 2007
    Henderson, NV
    They have the exact same specifications except for screen size. The 20" native resolution is 1680 x 1050 pixels. The 24" native resolution is 1920 x 1200 pixels.

    Because everything is equal doesn't the 20" have an easier job to do? It has a lot less pixels to display;1,764,000 for the 20" and 2,304,000 for the 24".

    Just a thought...
  2. suneohair macrumors 68020


    Aug 27, 2006
    Not really. The card won't have much of a problem rendering a couple hundred-thousand pixels extra. It is really a non issue. And, since there is more surface area in the iMac it might run better due to better dissipation of heat. A cool CPU is a happy CPU.
  3. WillJS macrumors 65816


    Jan 6, 2007
  4. Yuppi macrumors regular


    Aug 6, 2007
    It always depends on the benchmark you are comparing.
    If you compare a game at their native resolution, then yes the 20" will be faster. But you can run a game perfectly at a lower resolution on the 24". So if both iMacs run the same game on the same resolution, the performance is the same.
    Everything else than 3D is not affected by the pixel size. Imho even not video. Because the calculations have to be done for the native video resolution which afterward is transformed to a lower resolution in the video card (which does take a non measurable time).
  5. TheSelfishGene macrumors newbie

    Aug 29, 2007
    Yes, it will be faster. Basically you'll run both of them in 1680 x 1050 in games, just the image will be larger on the 24".
  6. thumper macrumors 6502


    Oct 25, 2003
    Under the Sea
    awesome name, and awesome book:rolleyes:
  7. joebells macrumors 6502

    Oct 24, 2005

    That doesn't make sense to me? You would want the game in the native resolution of the monitor.
  8. HLdan macrumors 603


    Aug 22, 2007
    Umm, nope! The GPU is better on the 24" so it will handle more intensive operations especially screen redraw.
  9. flopticalcube macrumors G4


    Sep 7, 2006
    In the velcro closure of America's Hat
    Both have the HD 2600 GPU. Are you thinking of the old iMacs?

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