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    667Mhz Ram on a 533MHz PC

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Dardoush, Mar 14, 2007.

  1. Dardoush

    Dardoush Notebook Enthusiast

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    I bought my PC with a 512MB RAM 533Mhz installed
    I replaced it with 2GB 667Mhz Rams (since my processor is T7200)

    Now i found that my PC is only 533Mhz capable, will the new 2GB ram installed run ok?
     
    Dardoush, Mar 14, 2007
    #1
  2. Greg

    Greg Notebook Nobel Laureate

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    Yes, though it will run at 533 instead.
     
    Greg, Mar 14, 2007
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  3. usapatriot

    usapatriot Notebook Nobel Laureate

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    As mentioned it will run a reduce speed, but it will work fine.
     
    usapatriot, Mar 14, 2007
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  4. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    Where did you see that it was only capable of 533MHz? I can pretty much guarantee that the RAM is running at 667MHz if that is what you installed. The FSB of the T7200 is 667MHz and the 945 series chipset supports DDR2-667.

    You can download CPU-Z to get a clear reading:
    http://www.cpuid.com/cpuz.php
    Go to the memory tab and see what the clocks are. They should be 333MHz (x2 to equal the DDR speed, so ~667MHz).
     
    Charles P. Jefferies, Mar 14, 2007
    #4
  5. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Even if the memory is running at 533MHz, the overall performance difference in reality will be very small because the clock latency at the lower frequency will be smaller.

    For example, I have a stick of Corsair RAM for which the timings are 5-5-5-15-20 at 333/667MHz and 4-4-4-12-16 at 266/533MHz. Those numbers are clock cycles to carry out the various memory access functions. The actual physical durations for these functions are the same.

    John
     
    John Ratsey, Mar 15, 2007
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  6. Neoguri

    Neoguri Notebook Consultant

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    My Sony SZ has a CoreDuo with 667mhz fsb but only takes 533mhz ram. He probably has a newer SZ.
     
    Neoguri, Mar 15, 2007
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