Any Thinkpad P52 owner?

Discussion in 'Lenovo' started by shengna, Jul 30, 2018.

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  1. ike2k

    ike2k Notebook Guru

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    Happy New Year all! Another FW update seemed to roll out that didn't appear to affect anything on the P52, rather just adding other models, but I feel like mine is power limit throttling much more now. Upon generating optimized media or rendering a 4k video project it just blips the thermal throttle and then power throttles through the entire process. Core TDP down to the range of 30-35W and Package TDP down around 37-39W. Then again, package temperature hovers in the 87-92C range, which before it was allowed into the high 90's. So, sounds like they are sucking more power for better thermals. Bummer, but necessary?
     
  2. ike2k

    ike2k Notebook Guru

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    I'm undervolted -160mv for core and cache. Tried pushing to -165 but wasn't stable in the long run editing 4k. I have some Arctic Silver 5 in my inventory, but the P52 sounds like a complete disassembly to re-paste, so I have been hesitant to try it being I have not re-pasted before.
     
  3. Mobius 1

    Mobius 1 Notebook Nobel Laureate

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    AS5 isn't ideal to use, and conductive.

    There are much better thermal pastes out there with better thermal conductivity and not conductive.
     
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  4. ike2k

    ike2k Notebook Guru

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    upload_2019-1-18_4-24-8.png
    upload_2019-1-18_4-26-54.png
    upload_2019-1-18_4-27-28.png
    Here are a few XTU and HWinfo current shots of my system during a 4k rendering. While temps are WAYYY down, it sounds like my fans are hardly spinning compared to before. I have not played with fan speeds at all. Max core freq seems to be more in the 3.3 GHz now compared to 3.65 GHz range before. I feel gimped!
     
  5. ike2k

    ike2k Notebook Guru

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    I guess I'll give throttlestop a try since I am already undervolted -160mV.
     
  6. ike2k

    ike2k Notebook Guru

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    Did around a 30 minute render today and at first the package TDP stayed at 45w, but then about 10-15 mins in it dropped to 35w for the rest of the render. Fans were ramped up at first and then as the wattage decreased, the fans slowed as well as if they had no problems keeping cool. On the chart below you can see the drop in power & speed about 1/3 of the way in. Temps only around 82c.

    upload_2019-1-19_17-58-40.png
     
  7. unclewebb

    unclewebb ThrottleStop Author

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    @ike2k - Try using the ThrottleStop FIVR - Disable & Lock Turbo Power Limits feature. It might be able to help with this type of throttling.

    [​IMG]
     
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  8. Kuro Kensei

    Kuro Kensei Notebook Consultant

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    Hey Unclewebb,

    Sorry to hijack the thread, but does you program have support for AMD Ryzen processors??
     
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  9. Kuro Kensei

    Kuro Kensei Notebook Consultant

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    It could be that you've undervolted too much and the effective power that your CPU is getting is now too low to sustain higher clocks. Can definitely see it in the max power/TDP values. Another thing to keep in mind, Lenovo did implement a very aggressive throttling policy in many of their notebooks. It may very well be throttling at around 80C. My E485 does that if I push TDP too high in the 40W+ range.
     
    Last edited: Feb 13, 2019
  10. Mobius 1

    Mobius 1 Notebook Nobel Laureate

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    @User32 @ike2k can you run some 3dmark benches?

    Preferably if you can heat up the machine to be nice and toasty on the CPU and GPU beforehand.


    Looking at what the 8850/P3200 MQ can do, but there's so little data on the P3200 MQ GPU.
     
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