CPU 40% - Heat 80 Degrees

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    • Official Post

    Without knowing more about your setup and what you were running at the time, it's difficult to diagnose.

    I'm guessing you have your RPi4 in a case and/or in a hot space. Try improving the ventilation to the CPU or think about a heatsink or a fan. Also, look at what addons you have installed, as not all are optimised for the RPi4.

    The RPi4 is known to run a little hot but not that hot - at idle it should be around 55 - 60 degrees.

    FYI:
    Playing mp4 with .264 and Dolby without mmal-HW acceleration box checked, my Pi4 heats up to 75° Celsius, mostly around 70° with cheap passive heat sink (and open case without cover!), idle as Iridium said around 60° max....
    and CPU load under these circumstances is really very low.
    HTH

    Ok you're right I should have said a bit more. What was running... well I posted the screenshots. Nothing.

    I know the Pi gets warm and I had that problem before, but not literally in idle. What is a bit weird is that cpu consumption is only around 40%.

    With the case not closed (Front door open) and no heatsink it should not get over 80 degrees right?

    This is a replacement I got the other day and I have not installed a heatsink yet, but I had one on the old one and that didn't do much, maybe 2-3 deg.

    The PI is running without a monitor connected. Maybe that's why;)

    I changed the usb power cable from a rather cheap one 1m to a shorter one around 40cm, and guess what, the temperature went down to 73 degrees. Then I changed it again to a rather expensive one from Anker and the temperature went down again. Now I have around 63 degrees in idle.

    Interesting.

    I have some addons installed, but not an awful lot. Some streaming apps like Netflix, Dazn, Mediathek stuff, Robwebber addons Cron, Backup, Auto library update and some subtitle addons like opensubtitle... enigma PVR is disabled.

    That's it basically.

    I have now tested the cables again and the difference between the good and the bad is approx. 10 degrees. Between 67 and 77 degrees.