Intel® NUCs
Support for Intel® NUC products
Do you have improvements you would like us to make on this community site? If so, we would love to hear your feedback! Click here for an 8 question survey. Thanks!

11441 Discussions

NUC6i5SYH cpu 80C and fan 4000RPM Playing League of Legends


I tried play League of Legends(the graphics scene is set to middle, not high) last night, found the cpu is 80c, and fan runs at 4000RPM, which is too loud.

I adjust the bios coolling settings before, make it minimal duty cycle as 25%, and when temp rise to 70C, add 2%.

I am wondering if my game cpu temperature and fan speed is normal? Can I reduce the fan noise during game playing, is there any way to limit the GPU? It looks like the GPU is the heat producer.

and what about my cooling settings, is that OK?

0 Kudos
3 Replies

Also interested in this. My NUC6i5SYK runs damn hot playing Heroes of the Storm, which should be relatively close to LoL in demand. I have installed the latest graphics / video drivers, and tweaked the performance settings in the graphics management app. Have not adjusted BIOS settings.


Hi bobjj and mgilbert,

It is better to run Intel® NUC Kits with default BIOS settings. Games demands a lot of resources from the system, specially Video. Make sure you are using the latest BIOS version 0033 and Windows® 10 updates.

For better performance, I recommend you to use 8GB of RAM or more.



Mike C
Super User Retired Employee

If you want to setup your own configuration, there are a few things that you need to understand...

  • Most processors publish a Control Temperature (called Tcontrol) that specifies the temperature limit that the fan speed control system is supposed to keep the temperature at or below. Provided the temperature is kept at of below this limit, no degradation due to temperature will occur. If you allow the temperature to rise above this limit, thermal degradation could occur over time. If the temperature rises too far above this limit (i.e. to the next limit, the Maximum Junction Temperature (called Tjmax)), the processor's Thermal Control Circuit (TCC) will power off the processor to protect it (this is called a ThermTrip). While it varies from one individual processor to another, Tjmax is somewhere in the vicinity of 100°C and Tcontrol is somewhere in the vicinity of 80°C. By definition, the fan should be at full speed (100% duty cycle) at and above the Tcontrol limit.

  • Your fan speed control algorithm consists of three parameters, a minimum temperature (Min-Temp), a minimum duty cycle (Min-Duty) and a per-degree increment in duty cycle (Rise) to occur above this minimum temperature. The (implied) maximum temperature should be your processor's Tcontrol temperature (use 80°C if you don't know it exactly) and the maximum duty cycle is (obviously) 100%. To calculate the per-degree rise necessary, use this algorithm:

Rise = (100 - Min-Duty) / (Tcontrol - Min-Temp)

  • By default, the BIOS automatically ascertains your processor's Tcontrol temperature and adjusts the Rise setting accordingly. It then gives you three automatic modes, Cool, Balanced and Quiet, that you can choose from (alternatively, you can choose Manual if you want to set the parameters your self). The difference between these three automatic modes is the Min-Temp value used:

  • The Cool setting uses a lower Min-Temp value, so that, as temperatures rise above it, the Rise (per degree) is smaller. The advantage of this approach is that, the smaller the Rise, the less noticeable changes in fan speed are. Bigger changes in fan speed are more noticeable and could become a source of irritation (this is the field of psycho-acoustics, which studies how changes in acoustics (noise level) affect people). The disadvantage of this approach is that fan speed begins increasing at a lower temperature.

  • The Quiet setting uses a higher Min-Temp value. The advantage of this approach is that increases in fan speed don't happen until a much higher temperature. The disadvantage of this approach is that, when temperatures rise and fan speed increases do occur, these increases are larger and more noticeable.

  • The Balanced setting uses an in-between Min-Temp value, playing off the advantages and disadvantages of the other two schemes against each other.

  • The fan on the processor is a 4-wire Pulse-Width Modulated (PWM) fan. That is, duty cycle values are transmitted to the fan via a PWM signal and the fan speed is accurately controlled from there. This fan should be used with a minimum duty cycle of 25% or higher. Lower settings could cause fan to operate unreliably (struggle) and could affect its overall lifetime.

Hope this helps,