Raspberry Pi 3 B+ Extreme Cooling
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- เผยแพร่เมื่อ 13 ต.ค. 2024
- Raspberry Pi 3 B+ cooling solutions -- from a small heat sink and a 30mm fan, to a 40mm Noctua fan and a large heat sink! See how the idle and load temperatures of a Raspberry Pi 3 Model B Plus can be significantly reduced . . .
The components I used in this video are on Amazon here (affiliate links):
Noctua 40mm 5V fan on Amazon.com: amzn.to/2IbP4ym
Noctua 40mm 5V fan on Amazon.co.uk: www.amazon.co.u...
30mm 5V fan equivalent on Amazon.com: amzn.to/2rCq2x6
30mm 5V Pi fan on Amazon.co.uk: www.amazon.co.u...
AAB Cooling NB Cooler 1 on Amazon.co.uk:
www.amazon.co.u...
AAB Cooling NB Cooler 1 on Amazon.com: amzn.to/2Iiq1pj
Note: the base of this large heat sink is 38 x 40 mm.
You can watch me overclocking a Raspberry Pi B+ using the Noctua fan and heat sink in this follow-up video: • Raspberry Pi 3 B+ Over...
More videos on computing and related topics can be found at: / explainingcomputers
You may also enjoy my recent book “Digital Genesis: The Future of Computing, Robots and AI”: amzn.to/2C2WrA6
And I have another TH-cam channel called ExplainingTheFuture at: / explainingthefuture
Liquid Nitrogen should get you there, failing that stand in a walk in freezer ;-)
Great video as always Chris. Love your SBC videos.
RoboNuggie I haven't tried the freezer but I did try using and old beer fridge putting the Pi inside and insulating the gap for the wires to come out , it made very little difference about 3°c all in all so just put beer back in the fridge and called it a day
lol, brilliant Mark...a win-win situation really:
Pi = Cooler --> Drink Beer (shame to let it warm up)
Pi= Not much cooler ---> Put back in fridge, drink beer later...
Huzzah!
i would just dual sided thermal tape to put directly the big heat sink on the rpi.
with noctua fan.
would be perfect.
RoboNuggie
So damn cool..
Am a software guy (CS) how can I start learning to program FPGS and use VHDL ... do I need to learn anything else before that ....
Can I get into Arduino immediately without taking other courses
RoboNuggie hahaha or sent it to space 😁🤣
I discovered ExplainingComputers on TH-cam about a year ago when I was first interested in Raspberry Pi. Now I find myself trying to watch the backlog of 10+ years of Chris Barnatt's videos any time my wife and kids are busy binging on Netflix. Today I discovered a whole list of his books available on Amazon!!! Thanks Chris, for sharing your knowledge and experience! You really make the best videos on TH-cam!
When it comes to heatsinks, I always go by the theory of making sure to have copper touch the CPU/GPU and then lead that copper into some type of aluminum. In my experience it's usually some type of aluminum fins. I noticed a huge difference when I first did this with using an all aluminum heatsink and then switching to one where copper touches the chip and leads off into aluminum. There's actually some physics behind this as copper absorbs heat much quicker and aluminum's ability to spread out and dissipate heat. I think that's how it works anyway, but it definitely makes a huge difference with the type of metals you use in regards to touching the chip to be cooled and so on.
Fantastic video on cooling the too hot from the oven pi down to a reasonable temperature, I especially like your little script for testing the temps and have promptly pirated a copy for myself. In fact all of your videos that I have watched have been very well done, easily understood and included enough of a back story to put everything into context without adding gratuitous fluff. Excellent job and please keep up the good work, I very much appreciate all that you put into your videos.
Thanks for your kind feedback.
This is the most helpful stress testing video for the Raspberry Pi I have seen on TH-cam. Excellent and well thought out with clear repeatable information. Thank you.
Thanks. Look out for the follow-up using a Pi 4B -- today! :)
I love the experience you make us live. Thanks.
Nice review :) I like the small heat sink and Noctua fan combination it seems a versatile and fairly robust solution. At some point in the future would you consider revisiting this topic with the same solutions and use the stress or stress-ng utility to see how well the cooling continues. I appreciate the number of combinations that the stress tool can provide might be a little daunting, therefore configuring a load that sits at load average of 8 over 1 minute would work well. I use these tools occasionally to see how well our scheduler is supporting my Linux audio components to prevent audio drop outs.
The fan is a good solution. Im using it for the SBC projects, mostly from small netbooks, and Im also using the small heat sink. Last one was for my godson, when I fitted the SBC in a toy car, and the fan on the roof. He is using it for gaming purposes, and the temperature never raises above 60 C.
Anyway, the final combination looks impressive. If you ever do decide to put such a massive radiator on the Pi, consider overclocking the CPU, and testing the results how far you can push the Pi limits
Thanks for the experiments. Superb, crystal-clear photography as usual.
That's it, i'll build one for myself. My Pi3 started showing the temperature icon while using Ubuntu Mate. And as always, thanks for the awesome content!
And I did adapt an aluminum heat sink! I was surprised at how hot it gets while doing unattended upgrades just after booting Ubuntu Mate. I wish there was a way to attach a picture.
great job on the cooling!!
Nice
This is truly amazing seeing a pi reach maximum performance while remaining at idle temperatures!!!
Cant wait for raspberry pi 4B 4gb ram to be tested with extreme cooling like this :D
That will happen!
Hypetrain is rolling
Please try a peltier 😀
I'm testing it with a 115W TDP Cooler that is supposed to cool i7s and Ryzens this weekend, to kick off the blog I'm launching after that. Try googling "Raspberry Pi 4 Arctic Freezer" mid August. Going to hook up a Pi with an SSD, an Arctic Freezer 7 Pro, Noctua NF-B9 and Thermal Grizzly Kryonaut paste, then bench the temps with and without overclocking in hardware hungry Retropie games like Perfect Dark (N64), Shen Mue (Dreamcast) or Monster Hunter Freedom (PSP).
@@ExplainingComputers now the 8 GB!!
I'm trying to learn more about what parts I should look for when trying to get my RPi3B+, and your channel is teaching me a lot. This video was specially helpful, and made me believe that SHS plus the smaller fan are a good enough team for my needs while saving up space. Thanks for that!
Once again another brilliant video , I've personally gone down the water cooling route at a cost of £120 for a pre made kit but only on the RPi 3 and so far I had practically the same results as you had on the large passive cool system you got with the new Pi , I'll let you know my results when I finally get around to upgrading
I am glad not to be the only one here trying these kinds of things! :)
Just discovered your channel, what a refreshing change! Clear, precise, informative, and intelligently presented videos. Keep up the good work sir!
Wow that's amazing that the idle temperature with no heatsink or fan is higher than the temperature the Pi had after the test with the LHS and the fan
Absolutely amazing! :D
And a great observation -- I wish I had spotted that in the video!
Thanks! xD
I was thinking water cooling, too just as you said it!!! But, I do agree, the middle of the road with the black heat sink and the fan. Great videos I enjoy them.
I could not stop LOL that big cooler on that little Raspberry Pie
thank you
Very , very Interesting .Since one hour , i was looking for information on the heat dissipation of the RPI and it was stressful to read debilitated forums. Nothing like an excellent demonstration video pedagogical. Thanks a lot
Thank you , Dr. Barnatt, for this interesting, ambitious, practical, and useful research effort you have done for us. It has indeed helped me to decide how to best cool my various RPi contraptions. It would also be a truly wonderful world if all those commentators who are suggesting to you that you undertake to do many alternative research variations, would themselves instead do them for us, and then offer up their professionally-presented results to the rest of us, entirely free-of-charge as you do. In that case I could continue to enjoy the benefits of all those efforts without actually having to do anything myself. A wonderful world indeed!
Lovely stuff. I once ventured into overvolting and overclocking a Raspi 2 using a 50W peltier cooler, that had the hot side cooled with a large liquid cooling system. I got CPU temps down to -11C and frost started to grow on the back of the PCB. By some kind of miracle the Raspi actually survived.
I bought a Noctua NF-A4x10 5V fan (10mm high) and placed into a home made frame facing downwords just 2mm above a small heatsink as showed on the video and a small heatsink on the 2 Gb memory chip. The airstream is blowing out from the frame. Now the Raspberry Pi4b is hoovering around 49 to 50° C at full load and 35° C on idle with an ambient room temperature of 21.5° C
Delid the pi, and use liquid metal with a Peltier chip! Do pi-bong cooling, hook it up to a water cooling loop from your well, I love cooling videos! Especially on odd components.
Just as an aside, the accessory care package that comes with Noctua stuff is part of the reason we who like them in our PCs buy them. That fan can be got for about £10 although £13 is more common. There's at least £5 of accessories included in the extension/low noise cables and those silicone mounts.
Good point. :)
Ask Linus tech Tips to do liquid cooling on Pi.
They don't care about anything that costs less than a gtx 1080.
People have done this already, it's not worth it, it's actually worse than a fan and a heatsink lol you can really only pull a .2ghz more out of it, so really what's the point? lol
@@samsh0-q3a i hope the foundation next gen pi will not come with factory locked processor.
@@minepro1206 unless it's droppable.
Bobby Bologna actually water cooling PCs works better than fans
Hey Chris you're videos are great man. I really appreciate what you're doing here. Anyways I just wanted to say that I'm not sure why you say that people have trouble getting their Pi 3B+ up to 1.6GHZ as long as you have great cooling. I must've hit the silicone lottery with mine because I have been running mine full tilt at 1.62Ghz for weeks now. The response time and loading time are a 1/4 of what they were at the beginning thanks to your videos.
You have done well in the silicon lottery to achieve 1.62. :)
There are many possibilities with this, imagine the servers you could make, because if you can keep it that cool, making 24/7 NAS servers or Web servers is possible. Pretty awesome video.
It's perfectly possible to keep a NAS or web server 24/7 as-is, with no cooling at all... Trust me, the SD card will be the thing that dies sooner.
Cracking video. Just got a pi a few days ago and getting in to the swing of things. Came across this video and it's incredibly helpful. Really well delivered concise info. Looking through your other videos it seems I'll enjoy all the non-pi content you've put out so far as well :)
Welcome aboard! :)
inspired by one of your video's I did something similar on a android box but used HC 910 thermal adhesive a very strong way to secure the heatsink cheers
I love watching you experimenting with different options with the goal of optimizing until you can't go much futher
Curiously I noticed you directed the airflow away from CPU with the cheaper fan but directed the airflow towards the CPU with the noctua. Was that deliberate? Does it make any difference? Am I asking a stupid question?
Oh right, and thanks for another video.
It is a very good question, and I think an error on my behalf with the smaller fan. :(
ExplainingComputers sorry I was just curious. My Pi case's instructions showed the fan blowing air away from the CPU but I set it up to blow on the CPU, so I wasn't sure if there was some CPU cooling secret I wasn't privy to.
if you have an open air design, i find it better for your fan to blow on the heat sink and if you have a closed case design, for it to pull air off of it. in the end though, the difference is marginal - you're still using the fan to promote airflow and the main difference is where you're going to get dust buildup over time. You should check out PC building airflow videos for explanations on that.
josh blowing away may be more effective, blowing down on a heatsink is known to be inefficient because air will hit the flat bottom of the heatsink. Always make air move across a heatsink so the airflow is unopstructed
not that you'd want to but could you re-run the cheaper fan again I'm curious as to how that'll play out against the noctua
Extreme: now that’s an understatement!
Towards the end in fact I wondered how far you would go 😄😄😄 and there you are!
I never thought you could get such drastic changes amazing video thanks again.
Hi Christopher, I really like your Raspberry PI videos, 2 months ago I got my first PI and I am now waiting for my 4th to arrive, I especially liked your Devastator Robot Videos as I would like to make a FPV Explorer Vehicle.
Keep up the good work :)
Thanks for this. I will return to the Devastator Robot project fairly soon.
I think I like the passive cooling with the big heat sink. The cooling was satisfactory with no extra power consumption although it bit bulky. Great video.
Really interesting video, would be nice to see the test with a overclocked Raspberry.
Overclocking makes a HUGE difference when you're using kodi, from stuttering 1080p30 h.265, to no stuttering at all.
Good idea about using a copper spacers. I just pressed a pretty big hewtsink on mine and could free it touching some other components.. I just crossed my fingers and it still worked when I turned it on so I figured it didn't short anything. I may pick up of of those copper spacers.
It would have been interesting to see the results when using a Pi fan without the small heatsink. In other words, to find the minimal configuration to keep the processor below 70C at full power.
Ah, I missed that one. Would indeed be interesting to try given the heat spreader on the Pi 3 B+.
watched a vid where a fella added a water cooling set up to his pi.. kind of defeated the mobility of the small board with a radiator that was way bigger than the board and with the reservoir and line made the area needed about 3 times as big... He called himself a "hacker" (I do not know what that is supposed to be these days) But he was obviously proud of himself.. A bit overboard I thought.. but this was a helpful experiment thanks Chris...
Wow! the noctua fan actually works... interesting! thank you for this vid i'm learning everyday.
the noctua fan is probably quieter too, they're extremely good fans.
rickster4k Yeah! Noctua stuff works great. If only they'd offer better color choices...
Of course a noctua fan works.
Hey 1974 color schemes can't be beat!
they do offer better colour choices...
Passive cooling with a large copper heatsink would be best as it will conduct the heat way from the die more efficiently, but if you become obsessive about getting the temperature then water cooling is really great. Back in the old days of Athlons I was water cooling my PC components and achieved an impressively low 2 degree rise above ambient temperature rise. Compared with a 50 to 70 degree C temperature rise using the OEM supplied heatsink and fan kit. Not only than but water cooling was so much quieter. Water cooling is perhaps less practical for something so small unless planning to build a cluster of raspberry PIs and off the shelf plumbing parts could be utilised in copper. Anyway, great video. Never realised just how hot the CPU SOC gets. Now going to fit a heatsink to mine.
Just curious, if you tested the (3 rd) with the fan blowing on the heatsink as you did with the Noctua fan just to see how they compare. I noticed that in the video you had the small 30 mm fan blowing up instead of down on the HS.
Great video on the other scenarios though . :)
Edit)- I scrolled down a little further and seen someone ask the same question :).
Thanks
The big heat sink appears to performed as well if not better than the smaller one. Indeed even better than the small heat sink and small fan combination. This may be the economical way to go. Just add the copper spacer (could an aluminum one worked?). No power connection/draws to worry about. What was the cost of this heat sink?
Regardless of the temperature, we'll always be big fans of these interesting videos.
The large heatsink's passive cooling ability was impressive. I shall most likely use a similar setup for my Orange Pi PC+. Where did you get the copper? Thanks.
The copper came from Amazon; I searched for "3mm copper plate", and managed to get a piece 50x50mm. Searching today on Amazon I first found a 100x50mm piece; amzn.to/2rUkwG8 But there may well be smaller bits. I looked at this in more depth -- cutting it and such -- in this video: th-cam.com/video/1AYGnw6MwFM/w-d-xo.html
Thanks for that. (A Mr Scissors fan.)
i would just dual sided thermal tape to put directly the big heat sink on the rpi.
with noctua fan.
would be perfect.
Your 'by the magic of film-making' is such an awesome catchphrase :)! I really appreciate all the hardwork you do. Keep on keeping on, Sir. Best of wishes from an awe-struck subscriber from Pakistan.
Thanks for subscribing! :)
You always make such "cool" videos.
Thanks. :)
This video was so interesting.
I'm planning on getting a Raspberry Pi 3 B,
but this video is still helpful and is making me think getting a small fan or at least a heatsink is a good idea.
You always make great videos, my Pi must be overheating with it's tiny heatsink and NESPi case.
The NESPi case has mounting for a 30mm fan as I used here.
ExplainingComputers think I'll have to invest in one! Poor Pi, has to work quite hard running emulators.
Knuckles the Echidn
Knuckles the Echidna Dude, add a fan. My Nespi with heat sinks and 30mm fan runs around 47 c. Even under load. If noctua made a 30 mm fan, I’d be using one. The pifan is a usable fix. A bit loud and needs proper mounting, otherwise it will vibrate and sound like a weed whacker. Also get a copper heatsink for the bottom chip.
I'd like to see longer term testing, actually saturating the heat sinks with thermal energy. great video!
47.2
47.2
47.2
47.2
47.2
47.2
47.2
OCD approved
It's always a good day when 'Stanley the Knife' makes an appearance!
Will there ever be a day when c.p.u's ( and computers ) are designed to take in localised heat ( including self generated ) and turn it into power which then can be used to cool in a efficient way
Saxon , I like how you think
Using the small heat sink and fan the overall size wasn't increased considerably, but still resulted in pretty good cooling.
Electronics on the Moon were cooled by heat sinks going to Octadecane and Eicosane wax... no air to move! That's per Ron Creel, LRV thermal control engineer... Something to try if I ever find a source...
I'm running behind and catching up on a few missed vids and the info here is great as I intend to make a few Pi rigs so that me and my daughter can play a few games like Minecraft as she's heavily into that and still plans for a career working in gaming, at the tender young age of 6.
I plan to see how good of a gaming experience can get gotten from various Pi's probably the Zero W and a Pi 3 B+ and I intend to do some overclocking for sport to see how far things can be pushed and remain stable with some well thought out but ghetto methods.
Another great vid, Chris.
Thanks for this -- I'm glad that you're catching up. :) And remember that a Pi comes with the Scratch visual language, which was created to get children into programming! :)
good vid, thanks for this, it wd be interesting to vary the ambient temp too, to simulate being iin a hot server room...just a thought
Nice idea -- noted for a future video if I can figure out how to control ambient.
If the server room is ”hot” then something isn’t right. Server rooms needs some kind of cooling installed, blowing around warm air doesnt’t do very much. But if by server room you mean a room at home where you keep a server that’s another thing :)
For a lot of digital electronics, engineers usually assume that the temperature rise (delta T) you see above your current ambient temp will apply at higher operating temps as well, within reason. So if you see a 15 degree rise in your system when ambient is 25C, you can be pretty confident you'll see the same 15C rise if ambient is at 50C, assuming your system is designed with reasonable airflow, all the parts are still in there listed operating range, and you don't have local hot spots likely to cause thermal runaway.
This assumption works well 95% of time. Measured temps are usually within a couple of degrees of where you would expect them to be, and that difference may be due to slight changes in the test setup and the accuracy of the thermocouples.
That doesn't absolve the engineers from testing the circuits at the top of their listed temperature range to insure an unexpected problem doesn't crop up.
If you're building a power amplifier with large discrete transistors however, much of the power may be dissipated in individual devices. Bipolar transistors tend to increase gain with increasing temperature (which increases power), and you could risk a thermal runaway problem. As such, the constant delta T assumption should be checked more carefully.
Cynthia is right, measuring the ambient temperature is enough to express a delta over ambient temperature. A lot of publications use the Delta T to compare cooling solutions rather than the measured absolute temperature.
Thanks to your videos I finally realized that an efficient cooling solution is indeed mandatory for the Raspberry Pi 3. And that the puny little heatsinks some manufacturers put in their kits are laughable at best. It seems that just putting a fan over the standard heatsink makes a huge difference, so I would say that to have a decent cooling system with a relatively small heatsink you have to have a fan. If not, heatsinks have to increase in size.
Oh and thanks for the sysbench tips!! Testing my system right now.
I also discovered that the "temp_limit" option in /boot/config.txt works pretty well.
Totally want the desktop PC coolers onto the RPi. Also want to see if cooling to ambient is even possible :)
Cooling to ambient is always possible. There is the one caveat that comes with that: WHY?
For Science, you monster. :)
Also, why not? :P
Yeah, yeah, I know.. just because you can, doesn't mean you should.
So, let Christopher do it for you and learn something along the way? ;)
Even if it turns out that there isn't much difference, its always good to see what is needed to keep it steady at a certain temperature. You know, for that "temperature sensitive" application that includes expensive crystals that throw out accuracy if it rises 0.1°C. Or not. It's academic at this point.
As an experienced overclocker, I do have to admit "just for the hell of it" is indeed a compelling argument. as for unstable crystals, well, a TCXO doesn't cost too much, or if you have access to good surplus an OCXO, or if you have a few extra bucks, Rubidium is cheap enough too ;) --... ...-- -.. . -.- -.-. ..... ...- -.. .---
interesting to see the difference. thank you from Spain.
My Favorite CS teacher is Mr Christopher Barranet.
I like Counter Strike also!
I know this is old but i still reference this video to this day. Love all your vids by the way! I think i have been subscribed for officially 3 years now! i am 13 and im pretty certain i subscribed on this day when i was 10. I actually did not know that there was the GPIO pins that tap directly to the micro USB port. Thanks for the info! I salvaged an old PC fan and cut off some female ends of some GPIO wires and attached them to the positive and negative wires. Works great!
You should take into consideration the time it takes to perform a heavy task, because if the cooling is poor then not only will the temperature change, but it will also begin to throttle, taking a longer time to complete the task.
True.
Impressive effort and results, i never heard of Noctua before, so checking them out now.
I think the main problem with small heat sink and big fan was that there was death zone under fan motor similar in size to the size of small heat sink itself. You could try puting fan not directly above heat sink but a bit to the right or left. Also to stabilize big heat sink you could just use another DIY plastic frame that would tight fit the heat sink.
In both cases the fan was not directly over the CPU -- in part due to mounting practicalities, but also to avoid the death zone as you note.
Ok, out of curiosity have you considered something like this:
www.amazon.co.uk/Enzotech-Corp-MOS-C10-MOSFET-heatsink/dp/B004CL89D8/ref=sr_1_22?ie=UTF8&qid=1526824983&sr=8-22&keywords=small+heatsink+copper
Or even go wild and try to fit this:
www.amazon.co.uk/SVF152C29M-Processor-Heatsink-Cooler-3VHK9TMN010/dp/B07D5MW85P/ref=sr_1_30?ie=UTF8&qid=1526824983&sr=8-30&keywords=small+heatsink+copper
Amazing Video ! Congratulations ! The last two coolers are amazing !
😂Haha. When I saw baseline, petroleum jelly came to my mind (that's how it is called in Greek). Nice video. Also you can enable a taskbar object that measures the cpu temperature in real time, while doing the benchmark.
@Julius Songling Ναι!
When the cooling solution is bigger than the device it should cool. (j/k, I love your videos.)
With a single Kintaro aluminium passive heatsink I'm having pretty remarkable results not surpassing 55°C at full load (Arctic MX-4 as thermal compound) on my Raspberry Pi 3 model B, just what I need for my portable project - it can't draw too much current out of the li-ion batteries. Only drawback is that it has to be mounted with screws through the same holes I need to mount the Pi where it has to go.
Solution: craft my own heatsink from spare heatsinks scavenged from old video cards, and secure it with thermal adhesive. That's the best solution I can think of at the moment.
Sounds like you have crafted a good solution.
Thanks to make this video. Thinking a microprocessor can work without any problem over 100 °C (at 170°C the internal solder are destroyed) I think you can use your Raspberry without any additional heathink safe.
I don't know of any microprocesor at works at anything close to 100 °C! :) Somewhere between 70 and 85 most chips will cease to function, or experience a very short life span.
All Intel cpus run up to around 100 degrees, the 4700MQ for instance thermal throttle at 99 degrees (C). Almost all modern laptops and Macbooks run at this temp under load. Somewhere from 85-99.
My i5 3380m Works at 102°C Without a Problem. It throttles at 105°C.
I've never actually seen a CPU fail in years of answering questions on broken PCs. The worst I've heard was a 8350 that was such a bad bin it had to be underclocked to be stable (and was RMAed at that point).
Toxy , Great to know that you think running a Chip at 100 Degrees is a " good " idea.
❌ Bad Choice though , unless you Don't like your computer
Never stop doing these "because u can" experiments. They're fun if not very practical
nice. they must modify the pie to have 4 small holes for more cooling mounting ideas.
Such holes would be so good!
No freaking space
I love your videos Mr.Barnatt. I have one little suggestion. For this kind of cooling videos, if you can add a time stamp (a temperature-time graph would be wonderful) that would be more informative in my opinion. I really would like to see the how different kind of passive cooling reach 70 degree mark before slowing down.
With the large heat sink covering the wifi chip, did you see any connectivity issues? I would think it could possibly interfere with signal strength.
I did not notice an issue, but did not explicitly experiment with the WiFi to find issues. Good point.
Interesting results, I wonder how well the larger heat-sink and fan would work here in California with our far higher ambient air temps? I must admit your voice always reminds me of the open university television lectures of my youth (yes I am a British transplant).
Would the 30mm fan not be more effective if it were blowing towards the cpu ?
It would make very little difference in an open rig like this -- probably none! :)
Maybe even more effective as it'll be drawing air through the heatsink and pushing it away ! @@ExplainingComputers
I have found that although sysbench maxes out the cpu cores nicely at 100%, not all 100% cpu loads are created equal. For example if you run: openssl speed -multi 4
The core temperatures ramp up much faster and peak higher. This would not
make a difference for one of one of your 'extreme cooling' solutions but it does make a significant difference for most average cooling solutions.
For example, those cute little 15x15x10mm heatsink ramp up to 80C very quickly under this load, and start to show the temperature warning thermometer icon and throttle back the CPU.
Even non-overclocked and installed in the well respected FLIRC case (one of the best stock thermal solutions) my P3b starts to intermittently show the temperature icon warning after running this benchmark for several minutes.
When invoked with the simple command above, openssl will run through all it's crypto hashing and cypher algorithms, and you will see the temperature shift a few degrees as the cpu load changes slightly.
You can experiment by locking it to a single algorithm aes, rsa, sha256, etc.
openssl speed -multi 4 aes
openssl speed -multi 4 rsa
openssl speed -multi 4 sha256
Unlike the Odroid C2, XU4 etc, which ship with adequate thermal solutions, the Pi 3, even the latest 3b+, is a thermal basket case as shipped, so be sure to include an extra 10 to 15 dollars for an adequate large heatsink/fan when comparing price/performance.
You sure you're not gonna go all the way and add a water block? Haha!
I do like that noctua fan setup, especially with the cable management, making it look nice and neat, if you want to use an extreme cooling method, try mounting a Pentium 4 northwood cooler from an old early 2000's Dell on it
I wish these tests also included the execution time of the benchmarks. It would help demonstrate how long the Raspberry Pi spent in the throttled state.
Fair point.
Sweet spot seems to be the fan and SHS. A few quid gets a decent reduction in temps. Seems against the point of buying a Pi if you then have to spend more than half as much again to keep it cool. Shows what can be done though and is very interesting
Very cool, very cool.
I always find the Pi cooling tests fascinating. Thank you. Two things. First, I take it that the hole on the metal covering on the chip is for cooling purposes. I wonder if a hole drilled into the heat sink that lined up with the hole on the chips metal case would affect the outcome of the small passive heat sink test. Second, could a person slow the clock of the Pi down and significantly affect the cooling (not that anyone would use a Pi set up that way), but if one did clock the B+ to perform like an original Pi, if one could find the Pi running cool enough without added cooling measures. Thanks for this video!
Overclocking? 1.5ghz! Hmm mini water cooler! I must try :)
Very helpful video! Applying these results to my MISTer!
Excellent video... but what about liquid nitrogen? ;-)
Uhm, now I wonder if I can get some on Amazon! :)
ExplainingComputers that would be awesome!! ;)
Great improvement for lower temperature. Any solution for warming are still pretty decent. Nice job! :D
Next time you should also add a timer so that it is possible to see if it is thermal throttling/how much it is thermal throttling. The less it thermal throttles, the faster it will complete the test.
True.
Add a Peltier cooler to the tests. Thanks for the demonstrations.
we now need the 2 fans the other way to see the difference
Why is this so satisfying?
I think I know what's next. An extreme overclock video that overclocks it to 1585 mhz. Because I overclocked my model B to 1385mhz and my ram to 635 mhz. I didn't overclock GPU. It didn't want to overclock.
Try overclockimg sdcard.
I did that. 100.25 mhz. The sd card READER. Yeah, it now performs full speed.
30G Put a heatsink on the RAM, take it to 700 Mhz. Also you can overvolt the CPU to get better OC.
A great test! Thanks for the video. By the way, even I would like to see water cooling on the raspberry pi.
Pimp my pi :)
Frankenstein's monster toward the end haha !
Water cooling would be an interesting experiment. Thanks i do say the BHS and Noctua fan combo was the best the Noctua and the smaller heat sink works best.
Go for mineral oil, and theme it as a aquarium lol
With fish? You certainly wouldn't need a heater!
Well Done Chris. Thank you for this presentation. What if you took the black heatsink and used some thermal paste? The adhesive backing on that first heatsink in my view is a good barrier to thermal conductivity.
Should have tried liquid cooling it.
I would mount the noctua with airflow drawing up and out on the small heatsink test. It’s more efficient to suck heat out, than to blow cool air in.
You should have run the test a few times if you wanted accurate results. There may have been outliers
I could always do more! But there are severe practicalities when recording too. 77GB of recorded data as I recall.
I don't think too much would change anyway. Thanks for the great videos! I would love to see how far you could push an overclock with this cooling!
Yes, I must try an overclock. :)