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    T400 - single vs dual DIMM - Is the RAM dual channel?

    Discussion in 'Lenovo' started by shizat63, Jul 26, 2009.

  1. shizat63

    shizat63 Newbie

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    Would splitting the RAM to fill both banks be faster? (2GB + 2GB vs. 4GB + empty)

    Ie. is the motherboard dual channel?
     
    shizat63, Jul 26, 2009
    #1
  2. ZaZ

    ZaZ Super Model Super Moderator

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    In a discernible way? Probably not.
     
    ZaZ, Jul 26, 2009
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  3. cparker09

    cparker09 Notebook Geek

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    The most noticeable difference would be in your wallet.
     
    cparker09, Jul 26, 2009
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  4. MidnightSun

    MidnightSun Emodicon

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    A 4GB stick of DDR3 RAM is definitely not worth the money, so go for 2GB + 2GB. Performance-wise, there will be little difference.
     
    MidnightSun, Jul 26, 2009
    #4
  5. useroflaptops

    useroflaptops Notebook Evangelist

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    i concur .
     
    useroflaptops, Jul 26, 2009
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  6. User Retired 2

    User Retired 2 Notebook Nobel Laureate NBR Reviewer

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    2+2GB RAM setup gives faster dual-channel X4500 performance, since it can interleave data. It would be crazy to go for a 1x4GB stick, as that's about 65% of the dual-channel performance setup AND costs more.
     
    User Retired 2, Jul 26, 2009
    #6
  7. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Yeah it can easily be 2400% more in cost :p
     
    sgogeta4, Jul 27, 2009
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  8. Imppy

    Imppy Notebook Guru

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    I got a lenovo T400 DDR3 1066 CAS 7 ram and a Crucial ram with the same specs, would there be dual channeling?
     
    Imppy, Aug 17, 2009
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  9. flipfire

    flipfire Moderately Boss

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    If only one slot is filled then its single channel.

    If both slots are filled with equal sized sticks then it will run on symmetrical dual channel. eg. 2+2gb

    If both slots are filled with uneven sized sticks then it will run on asymmetrical dual channel. eg 2+4gb
     
    flipfire, Aug 17, 2009
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  10. Imppy

    Imppy Notebook Guru

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    doesn't matter the brand right? I know this has been asked countless time already lol.

    thanks!
     
    Imppy, Aug 17, 2009
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  11. flipfire

    flipfire Moderately Boss

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    No as long as its a brand you've heard off.
     
    flipfire, Aug 17, 2009
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  12. MidnightSun

    MidnightSun Emodicon

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    No, it does not have to be the same brand for dual channel mode. Just the same specs.

    Next time, if you have questions (especially if it's multiple questions about the same thing), make your own thread instead of resurrecting a month-old thread - it's just forum etiquette.
     
    MidnightSun, Aug 17, 2009
    #12