How can I make my CPU not work as hard?

Blender Asked by Squirrel on November 28, 2020

I’m rendering edited footage using Blender, meaning everything is an emission shader with basic textures, so the samples are only at 1. However, the video is over 5500 frames long, and for some reason, my computer hums really loud and it gets extremely annoying. I wouldn’t mind if I only had to render for an hour or so, but since each frame takes an average of 2 seconds to render, and I have over 5500 frames in my animation, my computer will be screaming for over 3 hours. Is there a way I could make my CPU not work as hard? Is that even possible?

NOTE: I don’t mind if it takes longer to render

3 Answers

Under Performance, set the number of threads to "Fixed" and just use one or two threads. That should help keep the temperature lower and your fan slower if that's what's making the noise. It will take proportionally longer to render though (just leave it on overnight). Other than placing your computer in another room, that's about it.

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Correct answer by bertmoog on November 28, 2020

Blender 2.8x requires graphics card and driver with support for opengl 3.3 or higher as it is in the requirements

Answered by Tony Serra on November 28, 2020

I know that an answer specific for Blender was already posted, but some generic alternatives, to achieve this goal that I regularly use on Windows, are:

  • Battle Encoder Shirase: a program, that throttles CPU-usage on per process basis by regularly sending it to sleep. The program was originally developped for keeping the CPU cool while encoding media files but was also in large use in the BOINC-community
  • setting a lower process priority in task manager (doesn't help with overheating but keeps other processes responsive)
  • setting the maximum CPU-performance in the energy saving settings to for example 60%

Answered by H. Idden on November 28, 2020

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