Asus Zephyrus M - CPU undervolt and GPU undervolt + overclock

Discussion in 'ASUS Gaming Notebook Forum' started by lovemyg73, Dec 21, 2018.

  1. taraquin

    taraquin Notebook Consultant

    Reputations:
    10
    Messages:
    177
    Likes Received:
    54
    Trophy Points:
    41
    Interesting, I have done some of the Things you have done, but you inspired me to test even further :) I also have disabled optimus and only run with descrete GPU.

    Can share my experiences as well:
    - I have repasted GPU and CPU With thermal grizzly kryonaut. CPU-temp dropped With 4c under load, GPU dropped with 2C under load.
    - I run with fps-cap at 57 fps due to my g-sync IPS-displays max 60Hz.
    - I use a cooling pad that droppes both CPU and GPU With 3C under load.
    - I have undervoltet the 6700HQ to -164 core and -192 on cache, been stable for over a year now, temps dropped over over 10C under load.
    - At Stock after repaste and cooling pad the GPU ends at about 75C under the most demanding gamingloads or benchmarks, clocks run at 1800-1900 for the first few minutes and droppes Down to 1600-1700 when temp rises above 70C.
    - I currently use 1750MHz at 800mv in afterburner as flat line (max stable speed at that voltage). Max temp is 62C during Heavy load. Performance is about 10% lower than Stock. I also have a curve which uses 1800MHz at 900mv, temp is 67C max then and I barely avoid MHz-drop. Performance is 2-3% better than Stock. This curve is slightly more noisy so I usually og for the 1750@800mv since I often game Close to where my wife watches TV.

    Temps used to lie around 87C on CPU and 78C on GPU during gaming before none of these measures where Applied. I now get 62C on GPU and 65C on CPU as max with the 800mv-curve. Tomorrow I`m buying a watt-reader so I am excited to see the difference :) The computer is way less noisy during gaming and batterylife is a lot better.
     
  2. taraquin

    taraquin Notebook Consultant

    Reputations:
    10
    Messages:
    177
    Likes Received:
    54
    Trophy Points:
    41
    I tested with a energymeter in unigine heaven 4 at a fixed location and found something interessting, I let the setting run for 15 mins to stabilize temp/max voltage and then used gpu-z:

    First without g-sync and no fps-cap:
    Stock 850mv 75C 70fps 149w
    Flatline 1750 800mv 70C 64fps 134w
    Flatline 1600 800mv 66C 58fps 121w Flatline 1500 800mv 65C 55fps 115w

    I had to find a slightly less demanding area and then turned on g-sync and 58fps-lock:
    Stock 981mv 71C 137w
    Flatline 1750 800mv 65C 112w
    Flatline 1500 800mv 63C 110w

    From this I have basically learned that even with fps-lock and g-sync consumption is bad at stock, when enabling g-sync and fps-lock then the highest flatline you can use really pays off. If you don't use fps-lock then undervolting atleast on my notebook is not worth it since a 10% power-reduction also means an 8-9% performance reduction although slightly lower temps might be worth it for some.

    The first few minutes undervolt/flatline will always seem awful as performance often drops by over 10%, but after a few minutes the stock-clocks begin to throttle due to temp and after playing for 15 mins or more the I would say flatline is a smart choice for all those who cap fps :)
     
Loading...

Share This Page