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    heat/power usage difference between P8700 and T9550

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by QuadAllegory, Mar 19, 2009.

  1. QuadAllegory

    QuadAllegory Notebook Deity

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    Is there really that much of a heat/power usage difference between the P8700 and T9550? Mostly, I don't want as much heat on my laptop touchpad/keyboard.
     
    QuadAllegory, Mar 19, 2009
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  2. Johnny T

    Johnny T Notebook Nobel Laureate

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    P series is 25W, T is 35W. P series is the way to go. Cheaper, cooler, not much slower.
     
    Johnny T, Mar 19, 2009
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  3. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    In real life, if you undervolt both of them, you won't see much difference in power consumption (and hence battery life and heat) since most of the time your CPU runs on idle power.
     
    sgogeta4, Mar 19, 2009
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  4. Johnny T

    Johnny T Notebook Nobel Laureate

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    True about the undervolting, I have got my T8300 running @ max 23.76W. So at the end of the day you might as well get the P series due to its price. :D
     
    Johnny T, Mar 19, 2009
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  5. Andy

    Andy Notebook Prophet

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    CPU overheating (or heating) should not heat up your keyboard/touchpad area. AFAIK the keyboard/touchpad usually heat up due to HDD overheating.

    You can undervolt CPUs to reduce their TDP, improve battery life and reduce Load Temps + Fan RPM (Noise). If the tasks you run need alot of CPU power, go for the T9550, otherwise get the P8700.

    A P8700 will obviously be better in terms of battery life, load temps and fan noise.
     
    Andy, Mar 19, 2009
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  6. QuadAllegory

    QuadAllegory Notebook Deity

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    Well, my Dell XPS 1640 has pretty crappy thermal design, I've got a T9800 in here and it seems kinda hot. I'm returning the laptop because of bad speakers so I wondered if I should downgrade the CPU to get better battery life/lower heat. But, if you don't save all that much battery life and the heat difference is minimal after undervolting, I guess I'll stick with the T9800.

    I do have a 7200rpm hdd in here, but I'm getting a Intel X25-M or Samsung 256GB ssd soon.
     
    QuadAllegory, Mar 19, 2009
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  7. Johnny T

    Johnny T Notebook Nobel Laureate

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    Well if the CPU is not under the keyboard or palm rest then what is it under? LOL?

    Palm rest heat could be due to ram or wireless card heat too.
     
    Johnny T, Mar 19, 2009
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  8. Andy

    Andy Notebook Prophet

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    Well, I was bored so I made this thing in mspaint [​IMG]

    Heat.PNG

    The area in red heats up when I run encoding and stuff like that, and the area in blue is always warm (touchpad due to modem, and palm rest due to HDD). Keyboard and right palmrest are fine.

    But every notebook has a different cooling design, so the keyboard and all might be heating up due to the heatsinks, but one'll never know for sure unless they look up the SG or open up the notebook -.-
     
    Andy, Mar 19, 2009
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