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    What is the difference between "P" and "T" in laptops?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by SYS, Oct 21, 2008.

  1. SYS

    SYS Notebook Guru

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    Does "P" literally means they are 45W and Centrino 2 supported CPUs? And "T" means the older version of CPUs that are only 65W?
     
    SYS, Oct 21, 2008
    #1
  2. Michel.K

    Michel.K 167WAISIQ

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    AFAIK T5xxx has 35W and 2MB cache and T7xxx has 4MB cache
    P8xxx has 3MB cache
     
    Michel.K, Oct 21, 2008
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  3. f4ding

    f4ding Laptop Owner

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    The P version has lower power usage, but I think it's not 45W, perhaps 25W or somewhere around that. The T is the one with 45W.
     
    f4ding, Oct 21, 2008
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  4. Michel.K

    Michel.K 167WAISIQ

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    Thermal Design Power 34 W for T-series, not 45W
     
    Michel.K, Oct 21, 2008
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  5. tianxia

    tianxia kitty!!!

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    t versions=35w
    p/sp versions=25w
    L/SL versions=17w
    U/SU versions=10w
    X/QX versions=44/45w

    EDIT yonah t series chip have 34w tdp, meroms have 35w tdp
     
    tianxia, Oct 21, 2008
    #5
  6. Phil

    Phil Retired

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    And thermal design power is not the same as power usage.
     
    Phil, Oct 21, 2008
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  7. SYS

    SYS Notebook Guru

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    What's the difference? I am so confused. I thought P is the newer generation of T.

    In terms, which one is better?

    It's good how you guys helped out. Many thanks.
     
    SYS, Oct 21, 2008
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  8. Phil

    Phil Retired

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    "The Thermal Design Power (TDP) represents the maximum amount of power the cooling system in a computer is required to dissipate." (wiki)

    P has a lower TDP, meaning it gets less hot. It's more power efficient.

    If you have the choice between P or T of the same speed and same cachesize, P is the better option.
     
    Phil, Oct 21, 2008
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  9. SYS

    SYS Notebook Guru

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    Hey PhilFlow, thanks for replying.

    Did you read this news yet?
    http://www.itnews.com.au/News/87098,intel-to-launch-more-core-2-duos-in-late-december.aspx

    Are they talking about new "P" line which is coming out? So does this mean only the GHz will be changed but the Watts will always stay the same. Sorry, I am a newbie to mobile CPUs.
     
    SYS, Oct 21, 2008
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  10. Phil

    Phil Retired

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    Yes you are right, P stays 25 watt TDP, T stays 35 watt TDP.

    2.93GHz T9800
    2.66GHz P9600
    2.66GHz T9550
    2.53GHz T8700
     
    Phil, Oct 21, 2008
    #10