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    OC'ing cpu does this use more power

    Discussion in 'Alienware M11x' started by lookitsakyauk, Aug 1, 2010.

  1. lookitsakyauk

    lookitsakyauk Notebook Consultant

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    When overclocking the i7 will that hinder battery life if you limit the percentage of cpu usage while on battery? If so how much?
     
  2. tk112190

    tk112190 Notebook Consultant

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    Not sure by how much, but if you overclock, it gets more powerful - hence using more energy (power).

    No idea about how much.. but just hold the windows key + x and you can switch between "power saving mode" (lowers speed) and "high performacne mode" to get higher speed.

    Unrelated really to overclocking, but can provide u better battery life
     
  3. surfxombie

    surfxombie Notebook Evangelist

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    Woh! I never knew that... great tip! +1
     
  4. oncdoc

    oncdoc Notebook Consultant

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    hi, where can i find an overclocking step by step guide for my m11x r2?
     
  5. Noah14

    Noah14 Notebook Evangelist

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    +1 more rep for you!
     
  6. slickie88

    slickie88 Master of Puppets

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    • Reboot
    • Hit F2 when you see the alien head logo
    • Once in the BIOS right arrow to the Advanced menu
    • Scroll down to CPU Overclock and hit Enter
    • Scroll down to 166MHz and hit Enter
    • Hit F10 to save settings and reboot
    • If you manage to boot to the desktop then you're going to want to stress test your system at the bus frequency you've chosen.
    • If you get a BSOD then reboot and try the next lower setting for CPU OC.
    • Once you've booted successfully, download and install Prime95.
    • Fire up Prime95 and run the In-place large FFTs torture test.
    • Go watch a movie and eat dinner as you're going to want to let Prime95 run for at least a few hours.
    • If your system doesn't freeze or BSOD then you're probably OK at the setting you've chosen in the BIOS.
    • To further test, play a game or two for a few hours. This will get your CPU and GPU going at the same time.
    • Rinse and repeat until you find the frequency that's stable for you.
     
  7. tk112190

    tk112190 Notebook Consultant

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    Thank you both! :] It comes in handy a LOT for me, glad you two think so too :eek:
     
  8. hikarate

    hikarate Notebook Consultant

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    Slickie, would overclocking cause more heat on the hardware and thus lessen the life of the machine? Or does the fan make up for it?

    Also I imagine Overclocking kills your battery life, right, that's why you need to switch power plans.
     
  9. Jamezuh

    Jamezuh Notebook Enthusiast

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    I believe overclocking saves battery life because it gets hot faster so the computer undervolts the CPU.
     
  10. slickie88

    slickie88 Master of Puppets

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    Generally there will be more heat when you're overclocked, but even under prolonged load core temperatures are going to be well under the maximum thermal rating. The M11x's cooling system is very well designed and remember too that Speedstep helps out quite a bit with heat and power utilization.

    Stress tests of both the CPU and GPU that I ran about 6 weeks ago saw the CPU max out at something like 70C. The increase in heat due to overclocking isn't going to have any appreciable impact on the life of the CPU and certainly not something to worry about. I've had mine overclocked since day one and I don't ever plan on turning it off. I get 6 - 6.5 hours of battery life and that fine for my needs.
     
  11. slickie88

    slickie88 Master of Puppets

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    EDIT: wrong post
     
  12. kiwidaniel

    kiwidaniel Notebook Consultant

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    Overclock will use more power. Think about it logically. If the computer runs at 2.0 ghz forever it will drain more battery compared to running 1.2ghz with turboboost when the computer needs it.
     
  13. .PoNeH

    .PoNeH Notebook Evangelist

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    More power = less battery life. That is the dilemma most techies face when tweaking their machines. Unless of course new technology comes into play.
     
  14. surfxombie

    surfxombie Notebook Evangelist

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    More Power = less battery, also = more heat = more fan use... but it's not so simple and depends on what you are doing.

    Sitting idle then this is true, but if you start processing the ability to execute that faster means that you use more power for less time.

    If you do continuous heavy processing then lower clock speeds will make the battery last longer.

    With speedstep still enabled the CPU downclocks to below 1Ghz, where the difference will be less but the turbo boost on tap is substantially different.

    At the end of the day you need to find something that suits the way you want to use it.