Processor Speeds

Discussion in 'MacBook' started by likemyorbs, Dec 12, 2008.

  1. likemyorbs macrumors 68000


    Jul 20, 2008
    so the new macbooks base model comes with a 2ghz processor as we all know, which is lower than the previous generation. why do you guys think apple would do that? i think processor speeds are at a peak now, they have been in the 2-2.5 range for the past couple of years now and dont seem to be going up at all lately. anything under 2.0 would have been unacceptable for the macbook but the 2.4 isnt THAT much faster, thats my theory on it. anyone have a theory why they went with a technically slower processor than the older macbooks? you would think it would be the other way around...
  2. ebika macrumors 6502

    Nov 17, 2008
    The clock speed of the cpus is only one of the components that determine the overall performance of computers. For each clock cycle, the cpu can execute instructions, but with each iteration of processor, they tend to become more efficient in what they can accomplish in that one cycle. Other big components of overall performance is the amount of on-die cache, size of the transitors (less distance travelled tends to improve performance), bus speeds, and ram speeds. One of the limiting factors of overall performance is how fast the cpu can push and pull data to the RAM, meaning bus speed and RAM cycle speed. Although CPU clock speeds stayed the same between early '08 macbooks and the alu macbooks, they actually increased the front bus speed speed from 800MHz to 1066MHz. The type of RAM used went from DDR2 667MHz to DDR3 1066MHz. They also put a significantly faster GPU in the new macbooks that should greatly improve their performance in Snow Leopard compared to last gen macbooks. Next year, more of the i7 chips will come out with similar clock speeds to now, but with significant performance gains over what we have now.
  3. BayouBengal macrumors regular

    Oct 29, 2008
    The front side bus of the newer CPU is key. That combined with the new GPU, it's a much more powerful machine overall.
  4. California macrumors 68040


    Aug 21, 2004
    You know that is why I don't notice that much difference between my G5 Powermac Dual Core and the new macbook.

    Almost the same bus speed.

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