2.0Ghz??

Discussion in 'MacBook' started by jamesjingyi, Aug 10, 2012.

  1. jamesjingyi macrumors 6502a

    jamesjingyi

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    #1
    I probably sound like a massive noob but my MacBook Black from 2007 has the same amount of Ghz as the new MacBook Air when it's maxed out.
    How come mine is so weak compared to it?
     
  2. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #2
    It's not just the GHz. It's a completely different processor:
    MacBook Air "Core i7" 2.0 13" (Mid-2012) Specs
     
  3. jamesjingyi thread starter macrumors 6502a

    jamesjingyi

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  4. dukebound85 macrumors P6

    dukebound85

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    #4
    the frequency of the cpu

    there is more to play in terms od overall performance than just prc speed
     
  5. GGJstudios macrumors Westmere

    GGJstudios

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  6. jamesjingyi thread starter macrumors 6502a

    jamesjingyi

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    #6
    Yeah that says about the GHz, but how come the new i7 processor runs at the same GHz as my ancient MacBook?
     
  7. GGJstudios macrumors Westmere

    GGJstudios

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    #7
    A more advanced processor will achieve greater performance at the same clock speed as a less advanced processor. Clock speed is not the only factor in determining processor performance.
     
  8. imageWIS macrumors 6502a

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    #8
    This. Plus the RAM speed / amount and the HD read / write speed are also big factors in overall speed.
     
  9. robvas macrumors 68020

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  10. atMac macrumors 6502

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    #10
    You can only compare GHz to GHz when talking about the same CPU family.

    IE: Core2 Duo vs Core2 Duo, or SandyBridge vs SandyBridge

    What changes is the amount of work that each 1MHz does on the CPU, so while a Core2Duo may run 2.0 GHz like a 2.0GHz IvyBridge then that IvyBridge may be more efficient and make that 2.0 GHz do 2x's more work at the same speed, making it about as fast as a 3.8 - 4.0 GHz Core2Duo.

    Does that help explain? It's actually a bit more complicated than that, but you should get the general idea.
     
  11. richard.mac macrumors 603

    richard.mac

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    #11
    He was also asking why it has the same frequency (GHz) as his old MacBook.

    The MacBook Airs use an ultra low power CPU to allow it to be cooler in such a small body. Being ultra low power means that it will have a lower frequency, but as robvas said, it also has turboboost to increase the frequency for when the CPU is not using all of its cores and power.
     
  12. jamesjingyi thread starter macrumors 6502a

    jamesjingyi

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