Throttlestop help - undervolt not applying?

Discussion in 'Hardware Components and Aftermarket Upgrades' started by w.kni, Jun 20, 2018.

  1. w.kni

    w.kni Newbie

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    Hi all,

    I recently purchased a Razer Blade 15 (Intel Core i7-8750H CPU) and have been trying to undervolt my computer with Throttlestop (v8.60) to lower temperatures, but it doesn't seem to be working. I currently have the following undervolt settings:

    CPU: -142.6 mV
    GPU: -62.5 mV

    I recently ran a test on idle (1.5 hours) to measure if my machine's VID was different between a benchmark profile with no undervolt and my profile with the undervolt and got the following results:

    Benchmark
    VID: 0.575756
    MULTI: 10.4502
    Temp: 44.37193

    Undervolt
    VID: 0.578407
    MULTI: 10.43114
    Temp: 42.62984

    The VID is slightly lower without the undervolt, which to me was a little surprising (I would have expected to see the VID for the undervolt setting sit at around ~0.42). I have tried checking to make sure SVID was enabled but am unsure how to do that on a laptop running Windows 10 (I've checked the BIOS but couldn't find it).

    Please help me understand what I am doing wrong or what I misunderstand! I am totally new to this kind of tweaking and am eager to learn.

    I've attached screenshots of both the benchmark settings I used and the undervolt settings I used. If I could provide any additional information that would help, please let me know.

    Undervolt Main
    [​IMG]
    Undervolt FIVR
    [​IMG]
    Undervolt TPL
    [​IMG]
    Benchmark Main
    [​IMG]
    Benchmark FIVR
    [​IMG]
    Benchmark TPL

    [​IMG]
     
  2. unclewebb

    unclewebb ThrottleStop Author

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    In both screenshots, the exact same under volt is being applied to your CPU. Look at the table in the top right corner of the FIVR window. That is live data. It shows the exact same voltage offset of -0.1426V for Core and Cache in both pictures. When Unlock Adjustable Voltage is not checked, ThrottleStop will not adjust your voltage. It will leave the CPU at whatever offset voltage it was previously at. To reset the voltage to a zero offset you have to check the Unlock box and specifically tell ThrottleStop to use a zero offset. In the monitoring table it will immediately show an offset of 0.000V for Core and Cache if you have done this correctly.

    As for your iGPU under volt, I think for this to work correctly, the System Agent offset has to be set to the same offset voltage as the iGPU. If you have an Nvidia GPU then I would not worry about fine tuning the iGPU voltage until you get everything else sorted out first.

    For maximum performance, I would enable Speed Shift and I would use an EPP value of 0. This is useful when plugged in. For a lower CPU speed when idle, switch the EPP value to somewhere between 80 and 128. Also get rid of the Clamp option in the Package Power Limits section.

    For anyone wondering, I am still alive. Just on a holiday from ThrottleStop. :D

    But I did get some work done on TS lately. I have finished adding IccMax adjustment and that is working great. Looking to add AVX Offset adjustment too. TS is always a work in progress.

    [​IMG]
     
    0lok, Vasudev and Falkentyne like this.
  3. w.kni

    w.kni Newbie

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    Thanks a ton! Just checking that box and correctly setting up the Benchmarking profile dropped my temperatures by about 3 degrees on the undervolt profile. I'm not sure why that would happen, perhaps it wasn't correctly applying before. I'll have to run a few tests and see what kind of heat I get under high CPU/GPU usage (I've been averaging around 80 degrees with frequent spikes to 100 degrees, I was hoping to avoid temperatures like that by undervolting).
     
    Vasudev likes this.
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