Question about thermal performance (Razer Blade 15)

Discussion in 'Hardware Components and Aftermarket Upgrades' started by w.kni, Jun 19, 2018.

  1. w.kni

    w.kni Newbie

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    I have been taking some thermal measurements for my new Razer Blade 15 and am curious what other owners have been experiencing. Basically, I'm looking to see whether what I'm seeing with my Blade is normal or if it's running unusually hot.

    All temperatures are in Celsius. All tests were run with the laptop elevated so as to ensure a clear airflow.

    Benchmark
    Idle CPU temp (average): 43.4
    Idle CPU temp (max): 61

    Prime95 & Furmark CPU test temp (average): 89.8
    Prime95 & Furmark CPU test temp (max): 94

    Gaming CPU temp (average): 86.8
    Gaming CPU temp (max): 100

    Prime95 & Furmark GPU test temp (average): 81.3
    Prime95 & Furmark GPU test temp (max): 86

    Gaming GPU temp (average): 80.6
    Gaming GPU temp (max): 87

    Undervolted
    Idle CPU temp (average): 42.7
    Idle CPU temp (max): 61

    Prime95 & Furmark CPU test temp (average): 88.8
    Prime95 & Furmark CPU test temp (max): 93

    Gaming CPU temp (average): 82.7
    Gaming CPU temp (max): 100

    Prime95 & Furmark GPU test temp (average): 81.3
    Prime95 & Furmark GPU test temp (max): 86

    Gaming GPU temp (average): 76.6
    Gaming GPU temp (max): 80

    Undervolting seems to make almost no difference when running stress tests and when the CPU is idle. I am seeing about a 4 degree drop in temperatures when gaming. I am curious as to why I am not seeing overall lower temperatures from undervolting.

    These numbers seem a bit hot to me. I've been considering opening up the laptop and repasting (if needed), but do not want to void my warranty yet (just in case).

    For those of you with hardware experience, are these numbers good, okay, or bad?

    *I am not looking for fanboy answers like "sell your Blade and get a ..." I am aware of Razer's shortcomings, but I have had great experiences with them in the past and enjoy the portability and power of their systems.
     
    Last edited: Jun 19, 2018
  2. rinneh

    rinneh Notebook Virtuoso

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    They are quite hot, expected better fromt their statements.But still just under the limit.
     
  3. bennyg

    bennyg Notebook Deity

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    When you undervolt do the fans spin slower? And how much is the undervolt?
     
  4. w.kni

    w.kni Newbie

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    I am currently undervolting the CPU by 142.6 mV and the GPU by 65 mV. I'm not sure about the fan speeds, I'll need to take some measurements to see if they are spinning slower on the undervolt. I suspect that reducing CPU voltage may also be reducing the voltage going to the fans on my laptop.
     
  5. bennyg

    bennyg Notebook Deity

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    That's certainly a decent enough undervolt that it should be showing up as reduced temperatures.

    No it wouldn't work like that, the CPU is on its own complex circuit. Slower fans would be due to the fan speed algorithm deciding to increase & decrease speed depending on temperature. So fans spin slower despite the CPU drawing less power, leading to similar overall temps.

    The other possibility is that the CPU's and GPU's turbo/boost is eating up the power headroom gained due to the undervolt, and end up using the same amounts of power as before still showing as a thermal throttle on the CPU. So a higher average operating frequency is all you may see in that situation
     
  6. openglcg

    openglcg Notebook Consultant

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    The undervolt will not show up as reduced temps in this case. You are hitting the full throttling limits of the cpu. So the cpu hits 100c throttles and doesnt go higher. Probably with the undervolt it goes for longer before it hits 100c though. Even at lower temps some throttling can happen and it keeps the temps about the same.

    You should be noticing some stutters in game as the cpu hits various throttle conditions.

    These temps are very hot and you are for sure not getting anywhere near full performance of your cpu and gpu with them. Even with a thin laptop you should be below 100c. Ideally you are below 90c to avoid the most intense throttling and below 80c is nice to have when you can.

    You may want to look into repasting your cpu and gpu with something good like thermal grizzly kryonaut. Another help can be a laptop cooler that raises your computer and blows air on the bottom helping the vents and cooling the outside. Laptop cooler is easier but the paste will help a bit more.

    Sent from my SM-N950U using Tapatalk
     
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