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    Undervolting Intel i7 4700mq

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by kakakatakataomoi, Aug 6, 2014.

  1. kakakatakataomoi

    kakakatakataomoi Newbie

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    Hi:

    I have a lenovo ideapad Z710 laptop. It's average battery life isn't that great, and it sometimes runs pretty hot.

    Some people have suggested that i undervolt the cpu (i7 4700mq) using intel XTU to reduce the cpu temperatures and also to increase my laptop's battery life.

    Any tips/comments would be appreciated!

    Thanks
     
    kakakatakataomoi, Aug 6, 2014
    #1
  2. Loney111111

    Loney111111 Notebook Deity

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    Well, have you tried using XTU? I've read plenty of comments about people OCing that particular CPU.
     
    Loney111111, Aug 7, 2014
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  3. Marksman30k

    Marksman30k Notebook Deity

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    Give XTU a shot. Theoretically, XTU needs your ME Firmware and certain BIOS settings to be unlocked to work properly but you never know if yours has those supported.
    Basically, an adaptive Voltage undervoltage yields significant improvements to CPU power consumption.For me, with a -75mV offset, there was an estimated 25% reduction in power consumption, this doesn't mean too much from an idle power consumption perspective (due to Haswell's exceptionally low idle power use already) but it stands to significantly affect heavy scenarios, you might shave about 1W of idle power (depending on battery, this can equate to an extra 40 minutes). You can expect a temperature drop of at least 7 degrees under load.

    With XTU, you can also undervolt the L3 Cache and iGPU for further savings.
     
    Marksman30k, Aug 7, 2014
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  4. jedisurfer1

    jedisurfer1 Notebook Deity

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    give xtu a shot. Or use throttlestop to disable turbo.
     
    jedisurfer1, Aug 8, 2014
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  5. dumitrumitu24

    dumitrumitu24 Notebook Evangelist

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    Has anybody messed with turbo boost short power max and turbo boost power max?i have i7 4702mq?so my short power is 46,25W and power max is 37W?Can i lower that without losing performance and maybe reducing temperature?like if i put short power to 45W or 40?would that effect my performance?can i safely try that?
     
    dumitrumitu24, Sep 25, 2014
    #5