I read this article on Make: today that stated, that the Pi 3 was getting to temperatures as high as 87.6 Celsius! I don't have my Pi 3 yet does anyone have this problem?
"Make: Article" http://makezine.com/2016/03/02/raspberr ... atch-fire/
Pi 3 Overheating Issue?
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Re: Pi 3 Overheating Issue?
There's a thread here about this with some more info and commentary: viewtopic.php?f=63&t=138193
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Re: Pi 3 Overheating Issue?
It's not a problem and my Pi3 didn't catch fire when I got it to 82.5°C - the big make -j4 compile I was running completed OK.ItsMurf wrote:I read this article on Make: today that stated, that the Pi 3 was getting to temperatures as high as 87.6 Celsius! I don't have my Pi 3 yet does anyone have this problem?
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Re: Pi 3 Overheating Issue?
The article title appears to be from an old programming joke list of suggested additional machine instructions. I was always kind of partial to "Backspace and stretch tape" and "Execute operator immediate".ItsMurf wrote:I read this article on Make: today that stated, that the Pi 3 was getting to temperatures as high as 87.6 Celsius! I don't have my Pi 3 yet does anyone have this problem?
"Make: Article" http://makezine.com/2016/03/02/raspberr ... atch-fire/
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Re: Pi 3 Overheating Issue?
if you are worried get a heatsink 

Re: Pi 3 Overheating Issue?
or fit one of these http://cpc.farnell.com/honest-well/t23a ... dp/SW03177oryxhasapi wrote:if you are worried get a heatsink

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Re: Pi 3 Overheating Issue?
or find a pi gpio compatible fan the size of the cpu
Re: Pi 3 Overheating Issue?
Sounds good! Thanks to everyone who responded!
Much Pi Very Program.
-Murf
-Murf
Re: Pi 3 Overheating Issue?
We came across the overheating issue in our internal engineering review of this product. 207F (97C) with CPU load only in 71F (22C) ambient. We attempted to measure CPU+GPU load but the board crashed on numerous attempts. We saw temperatures go up to 210+F.
http://amzn.to/1Tqednr, temperature went down to a more manageable 50C.
After heatsink treatment: Re: Pi 3 Overheating Issue?
Nice advert!
Just the one heatsink on the SOC should nearly always be sufficient. Pimoroni are selling a nice one for £1.

Just the one heatsink on the SOC should nearly always be sufficient. Pimoroni are selling a nice one for £1.

Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.
Re: Pi 3 Overheating Issue?
deleted
Last edited by Nickcn on Mon May 16, 2016 3:29 am, edited 3 times in total.
Re: Pi 3 Overheating Issue?
Our heatsinks are better and cheaper after shipping. You can buy both and test yourselfGTR2Fan wrote:Nice advert!![]()
Just the one heatsink on the SOC should nearly always be sufficient. Pimoroni are selling a nice one for £1.

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Re: Pi 3 Overheating Issue?
I'm not sure what I'm doing wrong but a fingertip on the SoC occasionally and I'm finding it only slightly warm.
I think it's because I'm just using the thing and not deliberately trying to make it thrash.
I think it's because I'm just using the thing and not deliberately trying to make it thrash.
Re: Pi 3 Overheating Issue?
You are not doing anything wrong. loverpi is spamming us. See identical posts in other threads.
Memory in C++ is a leaky abstraction .
Re: Pi 3 Overheating Issue?
You may think it's spam but we consider it a legitimate issue with the board. I'm sure the foundation will put out a new Raspbian image with new firmware to fix the overheating issue by throttling the SoC more aggressively. For the HDMI signal to get corrupted is simply unacceptable. Even if the SoC cools down, the problem won't go away until you reboot.
Run the test yourself: apt-get install -y sysbench && sysbench --num-threads=4 --max-requests=999999 --test=cpu run
Warning: you may damage your board if you have this on for too long. To stop, press control C.
https://www.youtube.com/watch?v=0bC3dQYHfmQ
Run the test yourself: apt-get install -y sysbench && sysbench --num-threads=4 --max-requests=999999 --test=cpu run
Warning: you may damage your board if you have this on for too long. To stop, press control C.
https://www.youtube.com/watch?v=0bC3dQYHfmQ
Re: Pi 3 Overheating Issue?
I suspect your board may have a fault, since you seem to be the only one with any problems as you describe. Statistically, one example is insignificant.loverpi wrote:You may think it's spam but we consider it a legitimate issue with the board. I'm sure the foundation will put out a new Raspbian image with new firmware to fix the overheating issue by throttling the SoC more aggressively. For the HDMI signal to get corrupted is simply unacceptable. Even if the SoC cools down, the problem won't go away until you reboot.
Run the test yourself: apt-get install -y sysbench && sysbench --num-threads=4 --max-requests=999999 --test=cpu run
Warning: you may damage your board if you have this on for too long. To stop, press control C.
https://www.youtube.com/watch?v=0bC3dQYHfmQ
There is no way the chip will fail if it gets over 85, they are tested to 120 and will go higher (they have a reduced lifetime at those temps).
Principal Software Engineer at Raspberry Pi Ltd.
Working in the Applications Team.
Working in the Applications Team.
Re: Pi 3 Overheating Issue?
I've done a one hour job running with 400% CPU, When the temperature reached 80+ C, the RPi started to throttle down and never went beyond 83 C. It was mostly running with a clock speed between 922 and 960 MHz.loverpi wrote:You may think it's spam but we consider it a legitimate issue with the board. I'm sure the foundation will put out a new Raspbian image with new firmware to fix the overheating issue by throttling the SoC more aggressively. For the HDMI signal to get corrupted is simply unacceptable. Even if the SoC cools down, the problem won't go away until you reboot.
Run the test yourself: apt-get install -y sysbench && sysbench --num-threads=4 --max-requests=999999 --test=cpu run
Warning: you may damage your board if you have this on for too long. To stop, press control C.
https://www.youtube.com/watch?v=0bC3dQYHfmQ
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Optional fullscreen kiosk mode and command interface for embedded applications
Includes omxplayerGUI, an X front end for omxplayer
Re: Pi 3 Overheating Issue?
loverpi wrote:We came across the overheating issue in our internal engineering review of this product. 207F (97C) with CPU load only in 71F (22C) ambient.
Did you record the SOC's temperature sensor during this test? ( cat /sys/class/thermal/thermal_zone0/temp )
What are you using for a power supply to the board? Inadequate power would also be suspect in this scenario.We attempted to measure CPU+GPU load but the board crashed on numerous attempts. We saw temperatures go up to 210+F.
For what it's worth, your picture indicates that the 50 C reading is from the circuit board adjacent to the SOC so the SOC is likely considerably hotter, but is hidden behind the heat sink.After heatsink treatment: temperature went down to a more manageable 50C.
Re: Pi 3 Overheating Issue?
Is this with a Pi3 inside a case or with a "naked" Pi3 ?gkreidl wrote:I've done a one hour job running with 400% CPU, When the temperature reached 80+ C, the RPi started to throttle down and never went beyond 83 C. It was mostly running with a clock speed between 922 and 960 MHz.
I suspect a case, because there I get similar behavior. Without case, under full load the clock changed between 1150 and 1190 MHz in my case (without case) [edit: but with a passive heat-sink on top of the Soc]. But I only used the Linux program "stress --cpu 4" to create a full load on all cores for 15+ minutes. You did some compilation, I suppose?
Some say the produced heat depended on the ARM instructions being use. But isn't an ARM core either being under full 100% load or not? (Another questions is when we started to produce GPU load in parallel to a full ARM load...)
Also I still didn't find a reliable source clarifying the question whether the Broadcom Soc's internal temperature sensor's °C value differs significantly from an external temperature sensor's °C value, as one poster suggested in the other heating thread. Does anybody know?
Last edited by Fidelius on Fri Mar 11, 2016 7:57 am, edited 1 time in total.
Re: Pi 3 Overheating Issue?
Fidelius,
What on Earth do you expect?
Of course they will differ. One is very close to the action, the source of heat, the other is far away.Also I still didn't find a reliable source clarifying the question whether the Broadcom Soc's internal temperature sensor's °C value differs significantly from an external temperature sensor's °C value,
What on Earth do you expect?
Memory in C++ is a leaky abstraction .
Re: Pi 3 Overheating Issue?
My understanding is that these sorts of internal temperature sensors aren't particularly accurate. They need to be good enough for the intended purpose of monitoring for potentially damaging conditions, but they aren't calibrated. Somewhere I saw potential errors on the order of 10 C tossed out by an engineer working on a different (not Broadcom) ARM processor.Fidelius wrote:[Also I still didn't find a reliable source clarifying the question whether the Broadcom Soc's internal temperature sensor's °C value differs significantly from an external temperature sensor's °C value, as one poster suggested in the other heating thread. Does anybody know?
Keep in mind also that the chip die might not be at a uniform temperature. Generally the logic is segregated into different sections so exercising the CPU(s) with the GPU section essentially idle would produce a temperature gradient across the die and vice versa. If the temperature is sensed on an idle portion of the chip it would be different than the hottest part. I couldn't say how big an effect this would be, but I believe it is significant.
Finally there is the potential for measurement error in the various infrared photos that have been published. We have a tendency to believe numbers on a digital display, but instruments are subject to some level of error, particularly if they are not properly calibrated.
Re: Pi 3 Overheating Issue?
1) My Pi 3 is not in a case. And if it would be I would keep the lid open (have done so with all my Pis); it usually makes a difference of about 10 C. No heats sink (I've ordered some).Fidelius wrote:Is this with a Pi3 inside a case or with a "naked" Pi3 ?gkreidl wrote:I've done a one hour job running with 400% CPU, When the temperature reached 80+ C, the RPi started to throttle down and never went beyond 83 C. It was mostly running with a clock speed between 922 and 960 MHz.
I suspect a case, because there I get similar behavior. Without case, under full load the clock changed between 1150 and 1190 MHz in my case (without case). But I only used the Linux program "stress --cpu 4" to create a full load on all cores for 15+ minutes. You did some compilation, I suppose?
Some say the produced heat depended on the ARM instructions being use. But isn't an ARM core either being under full 100% load or not? (Another questions is when we started to produce GPU load in parallel to a full ARM load...)
Also I still didn't find a reliable source clarifying the question whether the Broadcom Soc's internal temperature sensor's °C value differs significantly from an external temperature sensor's °C value, as one poster suggested in the other heating thread. Does anybody know?
2) I converted a video with HandBrake and watched from a terminal via SSH (top, measure temp and arm freq. etc).
3) Regarding the GPU: the video decoder doesn't produce much heat, but the 3D part does:
playing a 1080p video with omxplayer: 48 C
playing the same video with kodi, also using omxplayer: 63 C; kodi uses OpenGL ES for the interface.
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Optional fullscreen kiosk mode and command interface for embedded applications
Includes omxplayerGUI, an X front end for omxplayer
Re: Pi 3 Overheating Issue?
What I fail to understand, is here the folks are crying in their milk, that the RPi 3, running stock speeds is overheating. Elsewhere, the folks are doing fairly well overclocking the bejeezers out of their RPi 3's, with and without heatsinks, and mostly smiling.
This does not make much sense to me. I don't have a RPi 3 yet, hopefully the budget will allow me to buy one, come month end.
Got a Pi B, Pi 2 and a Pi Zero - very happy with all of them.
This does not make much sense to me. I don't have a RPi 3 yet, hopefully the budget will allow me to buy one, come month end.
Got a Pi B, Pi 2 and a Pi Zero - very happy with all of them.
Re: Pi 3 Overheating Issue?
Regarding overclocking the Pi3: it may be possible to overclock the SDRAM or the SD card interface, but overclocking the processor is rather useless, because it will start to throttle down if multiple cores are used to a certain degree.java wrote:What I fail to understand, is here the folks are crying in their milk, that the RPi 3, running stock speeds is overheating. Elsewhere, the folks are doing fairly well overclocking the bejeezers out of their RPi 3's, with and without heatsinks, and mostly smiling.
This does not make much sense to me. I don't have a RPi 3 yet, hopefully the budget will allow me to buy one, come month end.
Got a Pi B, Pi 2 and a Pi Zero - very happy with all of them.
Minimal Kiosk Browser (kweb)
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Optional fullscreen kiosk mode and command interface for embedded applications
Includes omxplayerGUI, an X front end for omxplayer
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Optional fullscreen kiosk mode and command interface for embedded applications
Includes omxplayerGUI, an X front end for omxplayer
Re: Pi 3 Overheating Issue?
Thank you MarkTF and Gkreidl for your explanations. Very interesting.
(And I forgot to mention next to my throttle-back values, that I have a small passive heat-sink sitting on-top of the SoC. Edited now.)
That's what had surprised me, despite the logical explanation that the internal sensor needn't be calibrated an can have errors up to 10° C (like Mark explained).
(And I forgot to mention next to my throttle-back values, that I have a small passive heat-sink sitting on-top of the SoC. Edited now.)
Yes, that's clear, but in the other thread the external and more far away sensor showed 15-20° C more than the internal and closer sensor. :-)Heater wrote:Of course they will differ. One is very close to the action, the source of heat, the other is far away.Also I still didn't find a reliable source clarifying the question whether the Broadcom Soc's internal temperature sensor's °C value differs significantly from an external temperature sensor's °C value,
That's what had surprised me, despite the logical explanation that the internal sensor needn't be calibrated an can have errors up to 10° C (like Mark explained).