PicoCoreMX8MM normal CPU core temperature

Hello again,

I am working with the PicoCoreMX8MM + FS-BaseBoard.

Currently I am taking a look at the temperature while running an UI-Application.

Setup:

• Qt-Application with simple animation (3 simultaneously moving arrows)
• Resolution: Full-HD 1920x1080
• Cooling: PicoCore heat sink from F&S
• Temperature reading from: /sys/class/thermal/thermal_zone0/temp

Testcase 1: Software-Rendering (linuxfb backend)

• Result without cooling
  • CPU usage: 65%
  • Temp: 74°C
• Result with cooling
  • CPU usage: 65%
  • Temp: 60°C

Testcase 2: GPU-Rendering (eglfs backend)

• Result without cooling
  • CPU usage: 5%
  • Temp: 73°C
• Result with cooling
  • CPU usage: 5%
  • Temp: 58°C

Regarding the CPU usage, the big drop is expected, as the GPU does the heavy lifting now with the animation.

But I was expecting a more significant drop in temperature, as it basically stayed the same.

Are these measurements ok?
What are "normal" or expected temperatures when running an UI-Application with animations on full-hd panel?

The objective of those tests is to decide whether we need a heat sink or not.

Is it safe to run the PicoCoreMX8MM without heat sink in those temperatures (70-80°C)?

Thank you and best regards,

Stefan

I am currently using the heat sink that came with the evaluation package, which is a combination of the Heat Spreader PicoCore100 and Heat Sink PicoCore100.

Alright, thank you for the information!