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    1024MB DDR2 2.5V vs. 1.8V

    Discussion in 'Toshiba' started by Sircas, Oct 8, 2007.

  1. Sircas

    Sircas Notebook Consultant

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    I am adding more Ram via 1024MB that uses = DDR2 533MHz PC2-4200 SDRAM 2.5.

    However, the 1024MB that I have found is a 1.8V! Will this work / perform!

    Sircas
     
    Sircas, Oct 8, 2007
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  2. powerpack

    powerpack Notebook Prophet

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    Something is wrong here. DDR2 is 1.8v, DDR is 2.5v, so which is it.
     
    powerpack, Oct 8, 2007
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  3. Sircas

    Sircas Notebook Consultant

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    Powerpack,

    DDR2 = 2.5v! Does the Tecra M3 S-336 require a 2.5v SODIMM memory modules.

    Thanks,

    Sircas
     
    Sircas, Oct 8, 2007
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  4. randalle

    randalle Notebook Enthusiast

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    Here is the explanation. Higher Voltage means higher Operating Frequency making it faster. The maximum for 1.8V is 400Mhz , beyond that they need to use 2.5V for 400Mhz or more......

    You can check this site
    http://www.avanttechnology.com/so_dimms.html
     
    randalle, Oct 10, 2007
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  5. downloads

    downloads No, Dee Dee, no! Super Moderator

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    The link you provided shows just the opposite- all DDR2s use 1.8V including 667MHz. :D Even the DDR2 800MHz (PC2-6400) by Kingston uses 1.8V
    DDR uses 2.5V while DDR2 uses 1.8V.
    Still gotta admit Toshiba claims on it's website that this notebook uses 2.5V DDR2 modules- either a typo or non standard memory. You will have to buy Toshiba's dedicated upgrade memory in this case- Kingston KTT533D2/1G
     
    downloads, Oct 11, 2007
    #5