RTX2060 undervolting results

Discussion in 'Sager and Clevo' started by 1990BW, Sep 12, 2019.

  1. 1990BW

    1990BW Notebook Enthusiast

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    Hi I recently started undervolting my RTX2060 in a Clevo P970ED chassis.
    Before all of this I used a profile created by the OC scanner from Afterburner.
    The specs of my unit are:

    i7 8750h (2.4-3.9ghz)
    RTX2060 (960-1200mhz)
    16GB dual channel (DDR4-2400)

    Both the CPU and GPU have liquid metal and I've upgraded the thermal pads with Gelid Extreme pads.
    The CPU is undervolted by -0.100v and I removed the power limit with throttlestop.
    Temperatures on stock GPU settings are 75 degrees and 80-90 degrees for the unlocked CPU.

    To undervolt the GPU manually I've used this video from Bob of all Trades as a starting point:



    So I made a flat profile and tried to find the max stable clockspeed without hitting the power limit.
    These are my results so far:

    0.700v: 1455mhz
    0.718v: 1500mhz
    0.725v: 1515mhz

    And this is how the profile looks like:

    [​IMG]

    The amount of voltage the GPU needs is very low after 0.725v I 'already' run into the powerlimit of the GPU.
    HwInfo64 reports this is happening @ 80W with a temperature of 67 degrees.
    To be fair I already achieved +315mhz on the Nvidia specification and about +100mhz over the stock profile.

    The GPU is rated at 80-90w in order to verify this I did a benchmark with the OC scanner profile and it will hit 90w.
    It doesn't do for long though voltages and clockspeed are jumping around constantly.
    I also did a few 3DMark Firestrike runs and compared the results with similar RTX2060 laptops.
    The best graphics score I could get was around 16500 but I also noticed a lot of users get (much) better results.
    Here is a link to see the results I'm comparing to:

    https://www.3dmark.com/search#/?mode=advanced&url=/proxycon/ajax/search2/cpugpu/fs/P/2321/1242/16920?minScore=0&cpuName=Intel Core i7-8750H Processor&gpuName=NVIDIA GeForce RTX 2060 (Notebook

    So I have a few questions:

    1 Is the 80w power limit normal while it's rated to do 90w?
    2 Is it possible to unlock the gpu to 90w with a different bios?
    3 How on earth do other users get such insane results in firestrike with similar hardware?
     
    Last edited: Sep 13, 2019
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  2. jc_denton

    jc_denton Notebook Deity

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    The #1 score in the comparison seems bogus, its done with 2080ti as the secondary graphics card.

    Also, you're comparing an undervolted result to overclocked results. The 2060 you linked all run +2Ghz on the core.
    You want to find a voltage/mhz sweetspot where you're not hitting the thermal/power limit and can get the most out of your gpu.

    I'd use your core clock OC in afterburner, ie. +150mhz, as a baseline, locking the voltage to something like 0.950mV by pressing L on the node and testing FS score vs thermal vs power limits. And depending on what headroom is left, either allow for more voltage or lower the voltage.
     
  3. 1990BW

    1990BW Notebook Enthusiast

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    This piece of data isn't a good guideline because it's the stock full power RTX2060 profile which FS extracts from systeminfo.
    Laptops versions won't get near these performance levels due to tdp limit.

    The sweetspot of mine is @ 0.725v as far is I know.

    Tried this but the voltage can't be locked @ 0.950v.
    It jumps around 0.718-0.8v constantly ticking the power limit.
    FS score drops to around 16000 and GPU temps are 75-78 degrees.
     
  4. Amnvex

    Amnvex Notebook Enthusiast

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    If only we had a BIOS tweaker for RTX cards... all problems would be solved :p
     
  5. 1990BW

    1990BW Notebook Enthusiast

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    Forgot to click on apply in Afterburner o_O

    Got a graphics score of around 17000 with this method.
    0.950v (locked) is still to high though but I checked the voltage during the FS benchmark.
    Under load it was between between 0.718-0.812v.
    What I did next was loading the OC scanner profile and made the profile flat after 0.812v.
    Re-run FS and got a graphicsscore of 16978 I will finetune the profile further to get the best out of it.
    The cool thing is that I have several profiles for different usercases.
     
  6. Meaker@Sager

    Meaker@Sager Company Representative

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    Let us know when you finish coding it ;)
     
  7. 1990BW

    1990BW Notebook Enthusiast

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    Thanks for the input so far I have few more questions related to CPU undervolting.

    When you unlock the tdp in throttlestop you can also control ICCmax for the CPU core and CPU cache:

    [​IMG]

    [​IMG]

    If understand correctly ICCmax controls the max amps the CPU can pull.
    128 seems to be a common setting for this cpu in this scenario (unlocked tdp).
    I've ran Prime95 and dropped this value to the point it will throttle the lowest I could get was 110 without throttling.
    The ICCmax on the CPU cache I haven't touched this is set to 11 by default.

    1 What is the maximum save value for ICCmax for the CPU core for my CPU (8750h)?
    2 Does it make sense to lower the ICCmax on CPU core or is the max usage automatically controlled by the CPU anyways?
    3 Lets say I want to increase my undervolt to -0.120 will it help to gain stability if I raise the ICCmax on CPU cache? Or shouldn't I mess with ICCmax CPU cache at all?
     
  8. Meaker@Sager

    Meaker@Sager Company Representative

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    1. Technically stock, any extra current lowers life span.
    2. It only draws what it needs, you are just setting a max speed limit.
    3. Current limits dont impact stability directly, again like speed limits.
     
  9. 1990BW

    1990BW Notebook Enthusiast

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    Last edited: Sep 14, 2019
  10. Meaker@Sager

    Meaker@Sager Company Representative

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    That's just flashing another brand of file rather than editing however.
     
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