How I get 7 hrs+ with my Yoga Pro 2

Discussion in 'Lenovo' started by tassadar898, Oct 30, 2013.

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  1. tassadar898

    tassadar898 Notebook Evangelist

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    1) Undervolt (see previous post) this can help a lot depending on your chip. I was able to undervolt the cache, core, and GPU for a total savinings of .16V across all VID steps.
    2) No fan using notebookfan control untils 58C makes my medium usage basically never kick on ever saving battery and noise (Yoga 13 Fan Noise - Page 84 - Lenovo Community)
    3)Brightness 70%
    4)Balanced profile (everything set to maximum power savings and maximum CPU to 80%)
    5)Use internet explorer (it is MUCH more battery friendly especially when viewing flash videos)

    I have this with the high performance colors and at 3200x1800. Medium usage to me is web browsing/one note usage/IM+ with some flash content.
     
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  2. ksdehoff

    ksdehoff Notebook Enthusiast

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    A couple clarifying questions
    1. what specifically did you set your undervolts to? I have dynamic cpu voltage offset, processor cache voltage offset and processor graphics voltage offset. These all have very small steps, in mV - so I read your comment as having adjusted each of these by 160mV - but that seems to break my system.

    2. Just to confirm - the referenced table in that forum entry works correctly on the yoga 2 - just follow the directions?

    I'm assuming you've also disabled Intel Dynamic Platform Thermal system
     
  3. tassadar898

    tassadar898 Notebook Evangelist

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    1) No I set each one lower to about CPU (.04v) cache (.05v) (GPU (.08v). That is a total of about .17V. Each of these have different voltages so it is cumulative if my physics serves me well you are saving a total of .16V to the CHIP. Assuming there is about 15amps (highet VID I saw was about .95 at 27X multiplier) for a 15w TDP chip you are saving about 2-2.5watts at maximum load and less when current decreases.

    2) Yes the yoga13 one works perfectly for our yoga pro 2.

    Yes I disabled it
     
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  4. ksdehoff

    ksdehoff Notebook Enthusiast

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    thanks - on the #2 I got a verify error after the clear flash and it never appears to have flashed - and my EC version remains the same as the bios version - can you confirm sometime if you've got the 66ec42ww version?
     
  5. tassadar898

    tassadar898 Notebook Evangelist

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    Where can I check the EC version?
     
  6. ksdehoff

    ksdehoff Notebook Enthusiast

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    boot into the bios and it is on the first page- right below the bios version is the ec version

    I should ask what specific solution you implemented from that yoga 13 forum - it had both a bios EC controller change (not too popular) and then some German Fan Controller - did you go with the fan controller?
     
  7. SDC_Bolts

    SDC_Bolts Notebook Enthusiast

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    Could you provide a screen shot of your settings, I think I understand all your setting changes, but would like to verify. Thank you for all your input.
     
  8. tassadar898

    tassadar898 Notebook Evangelist

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    I went with the fan controller. Sorry I forgot to make that clear
     
  9. tassadar898

    tassadar898 Notebook Evangelist

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    from 100%-5% non stop use got 6 hours 35 minutes with the settings above. Watched two episodes of family guy for 50 minutes on flash video. Not quite 7 hrs but not too shabby. Now if we can just get Lenovo to allow our YP2 to go to lower GPU steps then 600mhz we'd see a nice bump in battery life.
     
  10. tassadar898

    tassadar898 Notebook Evangelist

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    By the way if you were to disable synaptics touch pad you could expect about 10-12% more battery life. If I do that I could easily reach 7 hrs +
     
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