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    upgrade from DDR2 800mhz to DDR2 1066mhz?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by qwestman, Dec 24, 2008.

  1. qwestman

    qwestman Notebook Guru

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    I currently have the p8400 with 1066mhz FSB. However, the ram supplied is 800mhz. Correct me if I'm wrong but doesn't this bottleneck the FSB to 800mhz? If so would it be possible and beneficial to upgrade to DDR2 1066mhz to utilize my full FSB?
     
    qwestman, Dec 24, 2008
    #1
  2. ramgen

    ramgen -- Morgan Stanley --

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    nope, that depends on your northbridge chipset...

    You can think of this as:

    CPU ===== (1) ===== Northbridge ===== (2) ===== RAMs

    The link marked as "2" runs at 800MHz max. This does not depend on your RAM speed. It can only downclock...

    For example the speed of link "2" will be 800MHz if your RAMs are DDR2-800 or DDR2-1066. However the speed of link "2" will be 666MHz if you have DDR2-666 or 533MHz if you have DDR2-533.


    ---
     
    ramgen, Dec 24, 2008
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  3. qwestman

    qwestman Notebook Guru

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    I see. So "1" would be 1066 mhz then? ARe there any benefits to having a higher "1" speed if the "2" speed slower?


    Which would be correct?

    "1" 1066mhz "2" 800mhz = "1" 800mhz "2" 800mhz
    "1" 1066mhz "2" 800mhz > "1" 800mhz "2" 800mhz
     
    qwestman, Dec 24, 2008
    #3
  4. GEORGE STUMBOLOPOLAS

    GEORGE STUMBOLOPOLAS Notebook Enthusiast

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    WELLL you cant get 1066 ddr2 for labtops. Might make em implode.
     
    GEORGE STUMBOLOPOLAS, Dec 24, 2008
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  5. ramgen

    ramgen -- Morgan Stanley --

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    Yeah, in your case (1) runs at 1066MHz and (2) runs at 800MHz.

    The second one is correct albeit the difference is negligible in real life workloads. The slight difference appears in some synthetic benchmarks...
     
    ramgen, Dec 24, 2008
    #5
  6. Tinselworm

    Tinselworm Notebook Deity

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    umm 'GEORGE', you can get DDR 1066, you can even get DDR3
     
    Tinselworm, Dec 24, 2008
    #6
  7. atbnet

    atbnet Notebook Prophet

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    Good diagram. It always helps to have a visual to see what is going on. I had used to think that your RAM and CPU speed should match, but this isn't the case.
     
    atbnet, Dec 24, 2008
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  8. Andy

    Andy Notebook Prophet

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    Even though the chipset supports memory frequencies upto 1066MHz, there are no DDR2-1066 SODIMMs available....for now.
     
    Andy, Dec 24, 2008
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  9. Tinselworm

    Tinselworm Notebook Deity

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    that sucks! i want DDR 1066
     
    Tinselworm, Dec 24, 2008
    #9