What is the ideal Raspberry Pi CPU temperature range?


11 posts
by sim_tcr » Tue Apr 09, 2013 10:09 am
Hello,

I live in Bangalore, India. Where the current temperature is 33c. And my Pi runs at 60c. (it runs 24/7). Temperature may vary 1 or 2 degree above/below 60c occasionally. Is this a safe temperature to operate? Sometimes after 6 or 7 days pi automatically reboots. I don't know if its because of the high CPU temperature. (if 60c is really high).

Are there any ideal CPU working temperature range documented somewhere?

Thanks,
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by forumisto » Tue Apr 09, 2013 10:35 am
The temperature of my pi is around 41 to 43 degress. It is not in a case. I plan to put it in closed case and use a cooler, and, and mayby, several heatsinks.
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by RaTTuS » Tue Apr 09, 2013 10:35 am
less than 80 is fine
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by pjc123 » Tue Apr 09, 2013 12:03 pm
I can't speak for running my Rev 2 pis in such high ambient temperature conditions (33 degrees C), but at room temperature (22 degrees C) I am seeing pi temperatures in the 40-ish degree C range. If I add the cover to the one pi which is in a plastic case (even though it has several openings in the case cover), the temperature quickly goes up to 50 degrees C. My other pi is in a sealed chassis with other heat generating components, so I have added a small fan to the chassis; It will also be used outdoors in higher ambient temperatures.
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by Komak57 » Tue Apr 16, 2013 9:30 pm
In a room averaging 80f (27c) my pi would typically run around 110f (40-45c). I received a few crashes which were actually due to a low-amp power sources, but I felt it unsafe to get so hot. What did I do? Well, first I looked around my obsolete circuits for old video cards and such for fast, and small fans. My spare parts Dreamcast gave me an 8000rpm fan that had a frame great for directing air flow over the CPU. This alone settled my pi at <100f(37c) even being run long term. This was great, but I wanted even safer cooling. On another board, designed for adding extra HDD's to a server, I found 2 small heat sinks. One was a fraction too big, and one was almost perfect. Added some thermal paste, and bam. Now my CPU sits at 93f (33c) all times of day in all temperatures. As soon as I make a custom case to incorporate the fan better, I will start overclocking and see how well it holds up.

The "allowed" temperatures range to about 80c before any damage becomes apparent. The "safe" temperatures cap out around 60c, and the "preferred" range caps around 40c. If I recall, you can get the temperature down to around 0c with proper insulation. Just depends on what you do with your pi. A fan and a heat sync on the CPU is all most need to keep their pi's safe for years to come.
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by jamesh » Wed Apr 17, 2013 8:50 am
Komak57 wrote:In a room averaging 80f (27c) my pi would typically run around 110f (40-45c). I received a few crashes which were actually due to a low-amp power sources, but I felt it unsafe to get so hot. What did I do? Well, first I looked around my obsolete circuits for old video cards and such for fast, and small fans. My spare parts Dreamcast gave me an 8000rpm fan that had a frame great for directing air flow over the CPU. This alone settled my pi at <100f(37c) even being run long term. This was great, but I wanted even safer cooling. On another board, designed for adding extra HDD's to a server, I found 2 small heat sinks. One was a fraction too big, and one was almost perfect. Added some thermal paste, and bam. Now my CPU sits at 93f (33c) all times of day in all temperatures. As soon as I make a custom case to incorporate the fan better, I will start overclocking and see how well it holds up.

The "allowed" temperatures range to about 80c before any damage becomes apparent. The "safe" temperatures cap out around 60c, and the "preferred" range caps around 40c. If I recall, you can get the temperature down to around 0c with proper insulation. Just depends on what you do with your pi. A fan and a heat sync on the CPU is all most need to keep their pi's safe for years to come.


45c isn't particularly hot...should be good for considerably more than that. Remember these devices are designed to sit inside mobile devices with no airflow.
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by eried » Wed Apr 17, 2013 9:11 am
At 19ºC mine runs about 40ºC, so maybe 60ºC is a nice temp for 30ºC:

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by leopheard » Sat Jan 04, 2014 10:12 pm
My RPI was just at 48 degrees celsius in a cupboard.

Turned it on its side (greater surface area exposed) and turned on a very low powered pathetic USB fan (run off RPi) pointed at it. In under 5m, it's now at 39 C.
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by jamesh » Sun Jan 05, 2014 10:22 am
I believe the temperature at which it starts to throttle itself is 85degC. No-one here has even got close to that. Hence there seems little or no need for active (or even passive) cooling systems except in very extreme environments (metal boxes in the desert come to mind)
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by geoffs » Mon Jan 27, 2014 4:34 am
Just thought I'd check the CPU temperature of my Raspberry PIi and it's sitting at 56°.
Mind you , the Raspberry PI is sitting in a sealed metal box (camera housing) on the wall of the shed and it's over 34° outside.
No problems so far.
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by AndyD » Mon Jan 27, 2014 6:22 am
It's about 30°C in my house at the moment and my Raspberry Pi is running at 54.6°C
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