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    P8400 vs T5800 battery life

    Discussion in 'VAIO / Sony' started by Sir Punk, Jan 21, 2009.

  1. Sir Punk

    Sir Punk Notebook Deity

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    I am trying to decide if the P8400 is worth the money in terms of battery life. The P8400 uses 25w as opposed to the T5800 that uses 35w. So a 10w difference. But as far as voltage range, the P goes up to 1.250v

    http://processorfinder.intel.com/details.aspx?sSpec=SLB4M
    http://processorfinder.intel.com/details.aspx?sSpec=SLB6E

    I am looking to buy an SR. But anybody who has any data or experience in comparing the two please chip in.

    I will also use RMclock and want to be able to under-volt the CPU. which on the two is more compatible with rmclock?
     
    Sir Punk, Jan 21, 2009
    #1
  2. boypogi

    boypogi Man Beast

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    how much is the difference between the two?
     
    boypogi, Jan 21, 2009
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  3. Sir Punk

    Sir Punk Notebook Deity

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    $100 on sonystyle, from the stores the SRs with ATI + P8400 are expensive, and hard to find. There are some on ebay.
     
    Sir Punk, Jan 21, 2009
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  4. allfiredup

    allfiredup Notebook Virtuoso

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    The specs-

    T5800- 2.0GHz, 800MHz FSB, 2mb L2 cache, 35W TDP, mfg using 65nm process
    P8400- 2.26GHz, 1066MHz FSB, 3mb L2 cache, 25W TDP, mfg using 45nm process

    The P8400 has a maximum clock speed that is over 10% faster, faster Front Side Bus and 1mb more L2 cache. As a result, the P8400 is a better overall performer than the T5800.

    The P8400 is built on the most current Penryn architecture, while the T5800 is built on the older Merom architecture. The T5800 has been superseded by the new T6400, which has the same specs (2.0/800/2) but makes the switch the Penryn 45nm process.

    Here are few benchmarks I was able to locate quickly-

    CPU / SuperPi 2M*/SuperPi 32M*/3DMark O6**(CPU score)
    T5800/70/1530/1650
    P8400/51/1212/2022
    * SuperPi- lower numbers are better/faster
    **3DMark06- higher scores are better

    Given the performance advantage and the newer technology of the P8400, I would say it's worth the extra $100, definitely!
     
    allfiredup, Jan 21, 2009
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  5. Brawn

    Brawn The Awesome

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    it's worth it, there is a very large difference and a difference like this is rarely priced at a 100$ difference

    however, if you do decide not to spend that on the processor, i am sure you will be happy with the other one too. the SR is an awesome laptop =]
     
    Brawn, Jan 21, 2009
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  6. Sir Punk

    Sir Punk Notebook Deity

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    will the P increase battery life?
     
    Sir Punk, Jan 22, 2009
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  7. Brawn

    Brawn The Awesome

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    yes, i believe it will
     
    Brawn, Jan 22, 2009
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  8. pardes3

    pardes3 Notebook Evangelist

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    I would vote for the p8400 ... these P series chips run much cooler and perform very well. IF anything get smaller hdd or less ram and get the P chip.
     
    pardes3, Jan 22, 2009
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  9. thebigpants27

    thebigpants27 Notebook Evangelist

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    WRONG. Less Ram will make your battery life worse. The P8400 is the lowest end REAL Montevina chip...dont buy anything lower than the P8400...they're budget and you will get what you pay for. If the SR falls too far from your budget go for a Ideapad u330 or a Vaio FW.

    People may not know this, but ive been following the SR's since release... Originally they came with 2.26 ghz P8400 as the minimum and the minimmum price for the SR was $1400. Since the SR2xx series, sony decided to cut the price to 900/1100 dollars, and make it more expensive to upgrade to what the bare end SR190 was. But really, it IS a 1400 dollar computer, dont be fooled by the 900 dollar price tag. Now, this doesnt 100% apply to you if all you do is very light computing...but for anyone else the low end model is pretty much crap(with the T5800 and 1gb of Ram)
     
    thebigpants27, Jan 22, 2009
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  10. Sir Punk

    Sir Punk Notebook Deity

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    you are very right sir. In fact I am steering away from Sony because of the crazy price to get a decent machine. The u330, the dell e6400 are good candidates. the u 330 as the p7350, is that a real montevina? it's a 2.0 but besides that has the same specs as the 8400
     
    Sir Punk, Jan 22, 2009
    #10